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Spindle shaped eggs Stock Photos and Images
Oriental darter or Snakebird (Anhinga melanogaster) at its nest with chicks : (pix SShukla) Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/oriental-darter-or-snakebird-anhinga-melanogaster-at-its-nest-with-chicks-pix-sshukla-image453251394.htmlRF2H9BANP–Oriental darter or Snakebird (Anhinga melanogaster) at its nest with chicks : (pix SShukla)
. The Australian Museum magazine. Natural history. Two White Caper Butterflies. (Male above and Female below). The spindle-shaped eggs of the butterfly are laid on the upper side of a leaf, sometimes as many as fifty being deposited on a single leaf. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Australian Museum; Australian Museum. Sydney, Australian Museum Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-australian-museum-magazine-natural-history-two-white-caper-butterflies-male-above-and-female-below-the-spindle-shaped-eggs-of-the-butterfly-are-laid-on-the-upper-side-of-a-leaf-sometimes-as-many-as-fifty-being-deposited-on-a-single-leaf-the-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-australian-museum-australian-museum-sydney-australian-museum-image235299925.htmlRMRJPRCN–. The Australian Museum magazine. Natural history. Two White Caper Butterflies. (Male above and Female below). The spindle-shaped eggs of the butterfly are laid on the upper side of a leaf, sometimes as many as fifty being deposited on a single leaf. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Australian Museum; Australian Museum. Sydney, Australian Museum
. A text-book of agricultural zoology. Zoology, Economic. DIPTEKA OE TEUE ELIES. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most .frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Tipula oleracea). 1 and 2, Male and female; 3, ova; 4, larva; 6, pupa. (Whitehead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larva living in water, even in b Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-text-book-of-agricultural-zoology-zoology-economic-dipteka-oe-teue-elies-205-sharp-conical-ovipositor-the-end-of-the-male-is-blunt-the-female-by-means-of-this-tube-lays-her-black-spindle-shaped-eggs-on-the-grass-or-near-some-plantsthe-greater-the-shelter-the-more-they-frequent-it-hence-we-find-these-pests-always-most-frequent-in-permanent-pastures-they-prefer-damp-spots-fig-99crane-fly-tipula-oleracea-1-and-2-male-and-female-3-ova-4-larva-6-pupa-whitehead-to-ovipositin-fact-most-tipulidse-frequent-damp-and-swampy-places-some-larva-living-in-water-even-in-b-image216446961.htmlRMPG408H–. A text-book of agricultural zoology. Zoology, Economic. DIPTEKA OE TEUE ELIES. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most .frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Tipula oleracea). 1 and 2, Male and female; 3, ova; 4, larva; 6, pupa. (Whitehead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larva living in water, even in b
Oriental darter or Snakebird (Anhinga melanogaster) at its nest with chicks : (pix SShukla) Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/oriental-darter-or-snakebird-anhinga-melanogaster-at-its-nest-with-chicks-pix-sshukla-image453251390.htmlRF2H9BANJ–Oriental darter or Snakebird (Anhinga melanogaster) at its nest with chicks : (pix SShukla)
![. Australian insects. Insects. Galleruca semipullata, lays its spindle-shaped eggs in patches on the leaves of both the wild and cultivated figs, upon the surface of which the dirty yellow coloured larvae^ feed, finally crawling down the trunks and pupating in the ground. The beetle measures about ^sof an inch in length; is of a. Fig- 99-âMonolepfa rosae (Blackburn). The Painted Leaf Beetle, ("Agri'tultural Gazette," N.S-W.) â dull ochreous yellow, with the outer margins of the broad elytra striped with dull bluish black. Hoplostinus viridi- pennis is a much smaller, dull brownish ye Stock Photo](https://c8.alamy.com/comp/RJRH44/australian-insects-insects-galleruca-semipullata-lays-its-spindle-shaped-eggs-in-patches-on-the-leaves-of-both-the-wild-and-cultivated-figs-upon-the-surface-of-which-the-dirty-yellow-coloured-larvae-feed-finally-crawling-down-the-trunks-and-pupating-in-the-ground-the-beetle-measures-about-sof-an-inch-in-length-is-of-a-fig-99-monolepfa-rosae-blackburn-the-painted-leaf-beetle-quotagritultural-gazettequot-ns-w-dull-ochreous-yellow-with-the-outer-margins-of-the-broad-elytra-striped-with-dull-bluish-black-hoplostinus-viridi-pennis-is-a-much-smaller-dull-brownish-ye-RJRH44.jpg ". Australian insects. Insects. Galleruca semipullata, lays its spindle-shaped eggs in patches on the leaves of both the wild and cultivated figs, upon the surface of which the dirty yellow coloured larvae^ feed, finally crawling down the trunks and pupating in the ground. The beetle measures about ^sof an inch in length; is of a. Fig- 99-âMonolepfa rosae (Blackburn). The Painted Leaf Beetle, ("Agri'tultural Gazette," N.S-W.) â dull ochreous yellow, with the outer margins of the broad elytra striped with dull bluish black. Hoplostinus viridi- pennis is a much smaller, dull brownish ye Stock Photo")
. Australian insects. Insects. Galleruca semipullata, lays its spindle-shaped eggs in patches on the leaves of both the wild and cultivated figs, upon the surface of which the dirty yellow coloured larvae^ feed, finally crawling down the trunks and pupating in the ground. The beetle measures about ^sof an inch in length; is of a. Fig- 99-âMonolepfa rosae (Blackburn). The Painted Leaf Beetle, ("Agri'tultural Gazette," N.S-W.) â dull ochreous yellow, with the outer margins of the broad elytra striped with dull bluish black. Hoplostinus viridi- pennis is a much smaller, dull brownish ye Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/australian-insects-insects-galleruca-semipullata-lays-its-spindle-shaped-eggs-in-patches-on-the-leaves-of-both-the-wild-and-cultivated-figs-upon-the-surface-of-which-the-dirty-yellow-coloured-larvae-feed-finally-crawling-down-the-trunks-and-pupating-in-the-ground-the-beetle-measures-about-sof-an-inch-in-length-is-of-a-fig-99-monolepfa-rosae-blackburn-the-painted-leaf-beetle-quotagritultural-gazettequot-ns-w-dull-ochreous-yellow-with-the-outer-margins-of-the-broad-elytra-striped-with-dull-bluish-black-hoplostinus-viridi-pennis-is-a-much-smaller-dull-brownish-ye-image235316932.htmlRMRJRH44–. Australian insects. Insects. Galleruca semipullata, lays its spindle-shaped eggs in patches on the leaves of both the wild and cultivated figs, upon the surface of which the dirty yellow coloured larvae^ feed, finally crawling down the trunks and pupating in the ground. The beetle measures about ^sof an inch in length; is of a. Fig- 99-âMonolepfa rosae (Blackburn). The Painted Leaf Beetle, ("Agri'tultural Gazette," N.S-W.) â dull ochreous yellow, with the outer margins of the broad elytra striped with dull bluish black. Hoplostinus viridi- pennis is a much smaller, dull brownish ye
. Botany for agricultural students . Botany. 420 BRYOPHYTES (MOSS PLANTS) plants of some Mosses can be identified by a small terminal cup in which the antheridia are produced. The antheridia produce numerous swimming sperms, and, when there is suitable moisture, the sperms reach the archegonia, swim down the long necks into the venters, and fertilize the eggs. The fertilized egg begins to grow almost immediately after fer- tilization, and like the fertilized egg of the Liverworts, it develops in the place in which it was formed. By rapid growth and cell division, it soon forms a spindle-shaped Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/botany-for-agricultural-students-botany-420-bryophytes-moss-plants-plants-of-some-mosses-can-be-identified-by-a-small-terminal-cup-in-which-the-antheridia-are-produced-the-antheridia-produce-numerous-swimming-sperms-and-when-there-is-suitable-moisture-the-sperms-reach-the-archegonia-swim-down-the-long-necks-into-the-venters-and-fertilize-the-eggs-the-fertilized-egg-begins-to-grow-almost-immediately-after-fer-tilization-and-like-the-fertilized-egg-of-the-liverworts-it-develops-in-the-place-in-which-it-was-formed-by-rapid-growth-and-cell-division-it-soon-forms-a-spindle-shaped-image216454930.htmlRMPG4AD6–. Botany for agricultural students . Botany. 420 BRYOPHYTES (MOSS PLANTS) plants of some Mosses can be identified by a small terminal cup in which the antheridia are produced. The antheridia produce numerous swimming sperms, and, when there is suitable moisture, the sperms reach the archegonia, swim down the long necks into the venters, and fertilize the eggs. The fertilized egg begins to grow almost immediately after fer- tilization, and like the fertilized egg of the Liverworts, it develops in the place in which it was formed. By rapid growth and cell division, it soon forms a spindle-shaped
![. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. I Phratora vitelline: Willow Beetle, catorpillarB. and eggs, magnified ; lines showing nat. length. o u , fromlf pSi^J'V fi.^^*'f °?,' ^^'' caterpillars or grubs hatched Thi« S-1*^'-'},''*!'' '°^*^"^e *he mischief. Ihese whitish spindle-shaped eggs are aid m Stock Photo](https://c8.alamy.com/comp/REMBG1/a-manual-of-injurious-insects-microform-with-methods-of-prevention-and-remedy-for-their-attacks-to-food-crops-forest-trees-and-fruit-to-which-is-appended-a-short-introduction-to-entomology-insect-pests-agricultural-pests-entomology-insectes-nuisibles-lutte-contre-les-ennemis-des-cultures-lutte-contre-les-entomologie-i-phratora-vitelline-willow-beetle-catorpillarb-and-eggs-magnified-lines-showing-nat-length-o-u-fromlf-psijv-fif-caterpillars-or-grubs-hatched-thi-s-1-!-quote-he-mischief-ihese-whitish-spindle-shaped-eggs-are-aid-m-REMBG1.jpg ". A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. I Phratora vitelline: Willow Beetle, catorpillarB. and eggs, magnified ; lines showing nat. length. o u , fromlf pSi^J'V fi.^^*'f °?,' ^^'' caterpillars or grubs hatched Thi« S-1*^'-'},''*!'' '°^*^"^e *he mischief. Ihese whitish spindle-shaped eggs are aid m Stock Photo")
. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. I Phratora vitelline: Willow Beetle, catorpillarB. and eggs, magnified ; lines showing nat. length. o u , fromlf pSi^J'V fi.^^*'f °?,' ^^'' caterpillars or grubs hatched Thi« S-1*^'-'},''*!'' '°^*^"^e *he mischief. Ihese whitish spindle-shaped eggs are aid m Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-manual-of-injurious-insects-microform-with-methods-of-prevention-and-remedy-for-their-attacks-to-food-crops-forest-trees-and-fruit-to-which-is-appended-a-short-introduction-to-entomology-insect-pests-agricultural-pests-entomology-insectes-nuisibles-lutte-contre-les-ennemis-des-cultures-lutte-contre-les-entomologie-i-phratora-vitelline-willow-beetle-catorpillarb-and-eggs-magnified-lines-showing-nat-length-o-u-fromlf-psijv-fif-caterpillars-or-grubs-hatched-thi-s-1-!-quote-he-mischief-ihese-whitish-spindle-shaped-eggs-are-aid-m-image232788081.htmlRMREMBG1–. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. I Phratora vitelline: Willow Beetle, catorpillarB. and eggs, magnified ; lines showing nat. length. o u , fromlf pSi^J'V fi.^^*'f °?,' ^^'' caterpillars or grubs hatched Thi« S-1*^'-'},''*!'' '°^*^"^e *he mischief. Ihese whitish spindle-shaped eggs are aid m
. Zoology : for students and general readers . Zoology. THE BOniNORTNCHUS. 165 Order 1. Acanthocepliali.—These are aberrant Nematode worms (sometimes referred to a separate class), without any mouth or digestive tract, but with an extensible spiny beak, living by imbibition of the fluids of the alimentary canal of their host. The thick subcuticula is penetrated by a network of ves- sels, whose trunks form two oval bodies of unknown use called UmnUci, whicli hang down free in the body-cavity. The sexes of Ecliinorhynchus are distinct. The eggs are usually spindle-shaped. The embryo develops in Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/zoology-for-students-and-general-readers-zoology-the-boninortnchus-165-order-1-acanthoceplialithese-are-aberrant-nematode-worms-sometimes-referred-to-a-separate-class-without-any-mouth-or-digestive-tract-but-with-an-extensible-spiny-beak-living-by-imbibition-of-the-fluids-of-the-alimentary-canal-of-their-host-the-thick-subcuticula-is-penetrated-by-a-network-of-ves-sels-whose-trunks-form-two-oval-bodies-of-unknown-use-called-umnuci-whicli-hang-down-free-in-the-body-cavity-the-sexes-of-ecliinorhynchus-are-distinct-the-eggs-are-usually-spindle-shaped-the-embryo-develops-in-image216404424.htmlRMPG221C–. Zoology : for students and general readers . Zoology. THE BOniNORTNCHUS. 165 Order 1. Acanthocepliali.—These are aberrant Nematode worms (sometimes referred to a separate class), without any mouth or digestive tract, but with an extensible spiny beak, living by imbibition of the fluids of the alimentary canal of their host. The thick subcuticula is penetrated by a network of ves- sels, whose trunks form two oval bodies of unknown use called UmnUci, whicli hang down free in the body-cavity. The sexes of Ecliinorhynchus are distinct. The eggs are usually spindle-shaped. The embryo develops in
![. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. DIPTJSKA Oil TRUE I'LIKS. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Ti]niln uUracm). 1 and 2, Male and female; 8, ova ; 4, larva; 5, pupa. (Whiteliead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larvie Stock Photo](https://c8.alamy.com/comp/RDY34K/a-text-book-of-agricultural-zoology-zoology-agricultural-zoology-economic-diptjska-oil-true-iliks-205-sharp-conical-ovipositor-the-end-of-the-male-is-blunt-the-female-by-means-of-this-tube-lays-her-black-spindle-shaped-eggs-on-the-grass-or-near-some-plantsthe-greater-the-shelter-the-more-they-frequent-it-hence-we-find-these-pests-always-most-frequent-in-permanent-pastures-they-prefer-damp-spots-fig-99crane-fly-ti-niln-uuracm-1-and-2-male-and-female-8-ova-4-larva-5-pupa-whiteliead-to-ovipositin-fact-most-tipulidse-frequent-damp-and-swampy-places-some-larvie-RDY34K.jpg ". A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. DIPTJSKA Oil TRUE I'LIKS. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Ti]niln uUracm). 1 and 2, Male and female; 8, ova ; 4, larva; 5, pupa. (Whiteliead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larvie Stock Photo")
. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. DIPTJSKA Oil TRUE I'LIKS. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Ti]niln uUracm). 1 and 2, Male and female; 8, ova ; 4, larva; 5, pupa. (Whiteliead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larvie Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-text-book-of-agricultural-zoology-zoology-agricultural-zoology-economic-diptjska-oil-true-iliks-205-sharp-conical-ovipositor-the-end-of-the-male-is-blunt-the-female-by-means-of-this-tube-lays-her-black-spindle-shaped-eggs-on-the-grass-or-near-some-plantsthe-greater-the-shelter-the-more-they-frequent-it-hence-we-find-these-pests-always-most-frequent-in-permanent-pastures-they-prefer-damp-spots-fig-99crane-fly-ti-niln-uuracm-1-and-2-male-and-female-8-ova-4-larva-5-pupa-whiteliead-to-ovipositin-fact-most-tipulidse-frequent-damp-and-swampy-places-some-larvie-image232320499.htmlRMRDY34K–. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. DIPTJSKA Oil TRUE I'LIKS. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Ti]niln uUracm). 1 and 2, Male and female; 8, ova ; 4, larva; 5, pupa. (Whiteliead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larvie
. A manual for the study of insects. Insects. i8o THE STUDY OF INSECTS. Family CliRYSOPID^ (Chry-sop'i-dae). Tlie Lace-zvinged-flies or Aphis-lions, If one will search the foliage of herbs, shrubs, or trees, there may be found, running rapidly around on the leaves, sturdy, spindle-formed, little insects that have great sickle- shaped jaws (Fig. 219). These larvae are always hungry, and will kill and eat any insects that they can overpower;. Fig. 219.—Eggs, larva, cocoon, and adult of Chrysopa, but as they are especially destructive to plant-Hce, they are called Aphis-lions. When an Aphis-lion Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-manual-for-the-study-of-insects-insects-i8o-the-study-of-insects-family-clirysopid-chry-sopi-dae-tlie-lace-zvinged-flies-or-aphis-lions-if-one-will-search-the-foliage-of-herbs-shrubs-or-trees-there-may-be-found-running-rapidly-around-on-the-leaves-sturdy-spindle-formed-little-insects-that-have-great-sickle-shaped-jaws-fig-219-these-larvae-are-always-hungry-and-will-kill-and-eat-any-insects-that-they-can-overpower-fig-219eggs-larva-cocoon-and-adult-of-chrysopa-but-as-they-are-especially-destructive-to-plant-hce-they-are-called-aphis-lions-when-an-aphis-lion-image216311526.htmlRMPFWRFJ–. A manual for the study of insects. Insects. i8o THE STUDY OF INSECTS. Family CliRYSOPID^ (Chry-sop'i-dae). Tlie Lace-zvinged-flies or Aphis-lions, If one will search the foliage of herbs, shrubs, or trees, there may be found, running rapidly around on the leaves, sturdy, spindle-formed, little insects that have great sickle- shaped jaws (Fig. 219). These larvae are always hungry, and will kill and eat any insects that they can overpower;. Fig. 219.—Eggs, larva, cocoon, and adult of Chrysopa, but as they are especially destructive to plant-Hce, they are called Aphis-lions. When an Aphis-lion
. A text-book of agricultural zoology. Zoology, Economic. DIPTEKA OE TEUE ELIES. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most .frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Tipula oleracea). 1 and 2, Male and female; 3, ova; 4, larva; 6, pupa. (Whitehead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larva living in water, even in b Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-text-book-of-agricultural-zoology-zoology-economic-dipteka-oe-teue-elies-205-sharp-conical-ovipositor-the-end-of-the-male-is-blunt-the-female-by-means-of-this-tube-lays-her-black-spindle-shaped-eggs-on-the-grass-or-near-some-plantsthe-greater-the-shelter-the-more-they-frequent-it-hence-we-find-these-pests-always-most-frequent-in-permanent-pastures-they-prefer-damp-spots-fig-99crane-fly-tipula-oleracea-1-and-2-male-and-female-3-ova-4-larva-6-pupa-whitehead-to-ovipositin-fact-most-tipulidse-frequent-damp-and-swampy-places-some-larva-living-in-water-even-in-b-image232125887.htmlRMRDJ6X7–. A text-book of agricultural zoology. Zoology, Economic. DIPTEKA OE TEUE ELIES. 205 sharp conical ovipositor, the end of the male is blunt. The female, by means of this tube, lays her black spindle-shaped eggs on the grass or near some plants—the greater the shelter the more they frequent it, hence we find these pests always most .frequent in permanent pastures. They prefer damp spots. Fig. 99.—Crane-fly (Tipula oleracea). 1 and 2, Male and female; 3, ova; 4, larva; 6, pupa. (Whitehead.) to oviposit—in fact, most Tipulidse frequent damp and swampy places, some larva living in water, even in b
The evolution of man : a popular exposition of the principal points of human ontogeny and phylogeny . Figs. 180, 181.—Haliphysema primordiale, an extant Gastraea-forin.Fig. I8O0 External view of the whole spindle-shaped animal (attached by-its foot to seaweed). Fig. 181. Longitudinal section of the same. Theprimitive intestine (d) opens at its upper end in the primitive mouth (m).Between the whip.cells (g) lie amoeboid eggs (e). The skin-layer (h) belowis encrusted with grains of sand, above with sponge-spicules. opening at the top is the mouth-opening (Fig. 181, m).The two cell-strata forming Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-evolution-of-man-a-popular-exposition-of-the-principal-points-of-human-ontogeny-and-phylogeny-figs-180-181haliphysema-primordiale-an-extant-gastraea-forinfig-i8o0-external-view-of-the-whole-spindle-shaped-animal-attached-by-its-foot-to-seaweed-fig-181-longitudinal-section-of-the-same-theprimitive-intestine-d-opens-at-its-upper-end-in-the-primitive-mouth-mbetween-the-whipcells-g-lie-amoeboid-eggs-e-the-skin-layer-h-belowis-encrusted-with-grains-of-sand-above-with-sponge-spicules-opening-at-the-top-is-the-mouth-opening-fig-181-mthe-two-cell-strata-forming-image342779478.htmlRM2AWJXM6–The evolution of man : a popular exposition of the principal points of human ontogeny and phylogeny . Figs. 180, 181.—Haliphysema primordiale, an extant Gastraea-forin.Fig. I8O0 External view of the whole spindle-shaped animal (attached by-its foot to seaweed). Fig. 181. Longitudinal section of the same. Theprimitive intestine (d) opens at its upper end in the primitive mouth (m).Between the whip.cells (g) lie amoeboid eggs (e). The skin-layer (h) belowis encrusted with grains of sand, above with sponge-spicules. opening at the top is the mouth-opening (Fig. 181, m).The two cell-strata forming
The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene . Figs. 180, 181.—Haliphysema primordiale, an extant Gastraea-form.Fig. 180. External view of the whole spindle-shaped animal (attached by-its foot to seaweed). Fig. 181. Longitudinal section of the same. Theprimitive intestine (d) opens at its npper end in the primitive month {m).Between the whip-cells (g) lie amoeboid eggs (e). The skin-layer (h) belowis encrusted with grains of sand, above with sponge-spicnles. opening at the top is the mouth-opening (Fig. 181, m).The two cell-strata forming t Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-evolution-of-man-a-popular-exposition-of-the-principal-points-of-human-ontogeny-and-phylogene-figs-180-181haliphysema-primordiale-an-extant-gastraea-formfig-180-external-view-of-the-whole-spindle-shaped-animal-attached-by-its-foot-to-seaweed-fig-181-longitudinal-section-of-the-same-theprimitive-intestine-d-opens-at-its-npper-end-in-the-primitive-month-mbetween-the-whip-cells-g-lie-amoeboid-eggs-e-the-skin-layer-h-belowis-encrusted-with-grains-of-sand-above-with-sponge-spicnles-opening-at-the-top-is-the-mouth-opening-fig-181-mthe-two-cell-strata-forming-t-image340000660.htmlRM2AN4A8M–The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene . Figs. 180, 181.—Haliphysema primordiale, an extant Gastraea-form.Fig. 180. External view of the whole spindle-shaped animal (attached by-its foot to seaweed). Fig. 181. Longitudinal section of the same. Theprimitive intestine (d) opens at its npper end in the primitive month {m).Between the whip-cells (g) lie amoeboid eggs (e). The skin-layer (h) belowis encrusted with grains of sand, above with sponge-spicnles. opening at the top is the mouth-opening (Fig. 181, m).The two cell-strata forming t
The evolution of man: a popular exposition of the principal points of human ontogeny and phylogenyFrom the German of Ernst Haeckel . Ftgs. 180, 181.—Baliphysema primordiale, an extant Gastraea-forra.Fig. 180. External view of the whole spindle-shaped animal (attached byil^s foot to seaweed). Fig. 181. Longitudinal section of the same. Theprimitive intestine (d) opens at its upper end in the primitive mouth (»).Between the whip-cells (g) lie amoeboid eggs (e). The skin-layer (h) belowis encrusted with grains of sand, above with sponge-spicules. opening at the top is the mouth-opening (Fig. 181, Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-evolution-of-man-a-popular-exposition-of-the-principal-points-of-human-ontogeny-and-phylogenyfrom-the-german-of-ernst-haeckel-ftgs-180-181baliphysema-primordiale-an-extant-gastraea-forrafig-180-external-view-of-the-whole-spindle-shaped-animal-attached-byils-foot-to-seaweed-fig-181-longitudinal-section-of-the-same-theprimitive-intestine-d-opens-at-its-upper-end-in-the-primitive-mouth-between-the-whip-cells-g-lie-amoeboid-eggs-e-the-skin-layer-h-belowis-encrusted-with-grains-of-sand-above-with-sponge-spicules-opening-at-the-top-is-the-mouth-opening-fig-181-image339997822.htmlRM2AN46KA–The evolution of man: a popular exposition of the principal points of human ontogeny and phylogenyFrom the German of Ernst Haeckel . Ftgs. 180, 181.—Baliphysema primordiale, an extant Gastraea-forra.Fig. 180. External view of the whole spindle-shaped animal (attached byil^s foot to seaweed). Fig. 181. Longitudinal section of the same. Theprimitive intestine (d) opens at its upper end in the primitive mouth (»).Between the whip-cells (g) lie amoeboid eggs (e). The skin-layer (h) belowis encrusted with grains of sand, above with sponge-spicules. opening at the top is the mouth-opening (Fig. 181,
Journal of experimental zoology . ve hemisphere. Fig 18. Eggs in sea-water at 1.55 p. m. Centrifuged 2.30 p. m. Fertilized 2.45 p. m. Drawn3.40 P.M. The gray cap extends into the polar lobe. Beginning of the first cleavage. Fig. 19. Eggs in sea-water 8.50 a. m. Centrifuged 9.40 a. m. Fertilized 9.45 a. m. Drawn 9.55A. M. The gray cap surrounds the maturation spindle and is thus ring-shaped. Fig. 20. Eggs in sea-water 1.55 p. m. Fertilized 2.03 p. m. Centrifuged 2.50 p. m. Drawn 3.0x2p. M. The gray cap has passed entirely into the larger cell CD. Fig. 21. Eggs in sea-water 8.50 a. m. Centrifuge Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/journal-of-experimental-zoology-ve-hemisphere-fig-18-eggs-in-sea-water-at-155-p-m-centrifuged-230-p-m-fertilized-245-p-m-drawn340-pm-the-gray-cap-extends-into-the-polar-lobe-beginning-of-the-first-cleavage-fig-19-eggs-in-sea-water-850-a-m-centrifuged-940-a-m-fertilized-945-a-m-drawn-955a-m-the-gray-cap-surrounds-the-maturation-spindle-and-is-thus-ring-shaped-fig-20-eggs-in-sea-water-155-p-m-fertilized-203-p-m-centrifuged-250-p-m-drawn-30x2p-m-the-gray-cap-has-passed-entirely-into-the-larger-cell-cd-fig-21-eggs-in-sea-water-850-a-m-centrifuge-image338065042.htmlRM2AJ05BE–Journal of experimental zoology . ve hemisphere. Fig 18. Eggs in sea-water at 1.55 p. m. Centrifuged 2.30 p. m. Fertilized 2.45 p. m. Drawn3.40 P.M. The gray cap extends into the polar lobe. Beginning of the first cleavage. Fig. 19. Eggs in sea-water 8.50 a. m. Centrifuged 9.40 a. m. Fertilized 9.45 a. m. Drawn 9.55A. M. The gray cap surrounds the maturation spindle and is thus ring-shaped. Fig. 20. Eggs in sea-water 1.55 p. m. Fertilized 2.03 p. m. Centrifuged 2.50 p. m. Drawn 3.0x2p. M. The gray cap has passed entirely into the larger cell CD. Fig. 21. Eggs in sea-water 8.50 a. m. Centrifuge
. A history of British birds : the figures engraved on wood . are never seen to alight on theground, gather these materials; some have supposedthat they catch them in the air as they are carried up bythe wind-, others, that they raise them by glancing * Buffon. BRITISH BIRDS. ^65 along the surface cf the ground; while others assert,with more probability, that they often rob the Sparrowof its little hoard, and frequently occupy the same hole,after driving out the former possessor. The female laysfive white eggs, rather pointed and spindle-shaped : theyoung ones are hatched about the latter end Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-history-of-british-birds-the-figures-engraved-on-wood-are-never-seen-to-alight-on-theground-gather-these-materials-some-have-supposedthat-they-catch-them-in-the-air-as-they-are-carried-up-bythe-wind-others-that-they-raise-them-by-glancing-buffon-british-birds-65-along-the-surface-cf-the-ground-while-others-assertwith-more-probability-that-they-often-rob-the-sparrowof-its-little-hoard-and-frequently-occupy-the-same-holeafter-driving-out-the-former-possessor-the-female-laysfive-white-eggs-rather-pointed-and-spindle-shaped-theyoung-ones-are-hatched-about-the-latter-end-image375298456.htmlRM2CPG908–. A history of British birds : the figures engraved on wood . are never seen to alight on theground, gather these materials; some have supposedthat they catch them in the air as they are carried up bythe wind-, others, that they raise them by glancing * Buffon. BRITISH BIRDS. ^65 along the surface cf the ground; while others assert,with more probability, that they often rob the Sparrowof its little hoard, and frequently occupy the same hole,after driving out the former possessor. The female laysfive white eggs, rather pointed and spindle-shaped : theyoung ones are hatched about the latter end
. Botany for agricultural students . Botany. 420 BRYOPHYTES (MOSS PLANTS) plants of some Mosses can be identified by a small terminal cup in which the antheridia are produced. The antheridia produce numerous swimming sperms, and, when there is suitable moisture, the sperms reach the archegonia, swim down the long necks into the venters, and fertilize the eggs. The fertilized egg begins to grow almost immediately after fer- tilization, and like the fertilized egg of the Liverworts, it develops in the place in which it was formed. By rapid growth and cell division, it soon forms a spindle-shaped Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/botany-for-agricultural-students-botany-420-bryophytes-moss-plants-plants-of-some-mosses-can-be-identified-by-a-small-terminal-cup-in-which-the-antheridia-are-produced-the-antheridia-produce-numerous-swimming-sperms-and-when-there-is-suitable-moisture-the-sperms-reach-the-archegonia-swim-down-the-long-necks-into-the-venters-and-fertilize-the-eggs-the-fertilized-egg-begins-to-grow-almost-immediately-after-fer-tilization-and-like-the-fertilized-egg-of-the-liverworts-it-develops-in-the-place-in-which-it-was-formed-by-rapid-growth-and-cell-division-it-soon-forms-a-spindle-shaped-image231989524.htmlRMRDC104–. Botany for agricultural students . Botany. 420 BRYOPHYTES (MOSS PLANTS) plants of some Mosses can be identified by a small terminal cup in which the antheridia are produced. The antheridia produce numerous swimming sperms, and, when there is suitable moisture, the sperms reach the archegonia, swim down the long necks into the venters, and fertilize the eggs. The fertilized egg begins to grow almost immediately after fer- tilization, and like the fertilized egg of the Liverworts, it develops in the place in which it was formed. By rapid growth and cell division, it soon forms a spindle-shaped
. British dragonflies (Odonata). Dragon-flies; Odonata -- Great Britain. 302 British Dragonflies. surrounded with a coatint:^ of air, the surface-film of the water next which gHstened hkc sih'er. She appeared to lay some eggs, or, at any rate, dip the end of her abdomen before descending, and even while flying. In shape closely resembling that of Al. jiincecx ; length about imm., breadth about •2mm. ; spindle-. FiG. 53.—Mask of Nvmph of Enallagma cvathigerum. (Much magnified,) shaped, more pointed at one end than at the other, rather broader near the sharp end ; transjiarent, or ver}' nearly s Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/british-dragonflies-odonata-dragon-flies-odonata-great-britain-302-british-dragonflies-surrounded-with-a-coatint-of-air-the-surface-film-of-the-water-next-which-ghstened-hkc-siher-she-appeared-to-lay-some-eggs-or-at-any-rate-dip-the-end-of-her-abdomen-before-descending-and-even-while-flying-in-shape-closely-resembling-that-of-al-jiincecx-length-about-imm-breadth-about-2mm-spindle-fig-53mask-of-nvmph-of-enallagma-cvathigerum-much-magnified-shaped-more-pointed-at-one-end-than-at-the-other-rather-broader-near-the-sharp-end-transjiarent-or-ver-nearly-s-image234237803.htmlRMRH2CKR–. British dragonflies (Odonata). Dragon-flies; Odonata -- Great Britain. 302 British Dragonflies. surrounded with a coatint:^ of air, the surface-film of the water next which gHstened hkc sih'er. She appeared to lay some eggs, or, at any rate, dip the end of her abdomen before descending, and even while flying. In shape closely resembling that of Al. jiincecx ; length about imm., breadth about •2mm. ; spindle-. FiG. 53.—Mask of Nvmph of Enallagma cvathigerum. (Much magnified,) shaped, more pointed at one end than at the other, rather broader near the sharp end ; transjiarent, or ver}' nearly s
. The butterflies of the eastern United States. For the use of classes in zoology and private students. Butterflies; Butterflies. EASTERN UNITED STATES. 137 which is on the end of the cell. Fore wings as in the males. This species feed on senna, Cassia Marilandica, and possibly other species. The eggs are long, narrow, spindle- shaped ; the sides marked by about thirty longitudinal ribs without cross-striae. When first deposited they are greenish yellow, turning red after a few hours. The young larva is whitish, semi-translucent, a few whitish clubbed appendages to each segment. The mature lar Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-butterflies-of-the-eastern-united-states-for-the-use-of-classes-in-zoology-and-private-students-butterflies-butterflies-eastern-united-states-137-which-is-on-the-end-of-the-cell-fore-wings-as-in-the-males-this-species-feed-on-senna-cassia-marilandica-and-possibly-other-species-the-eggs-are-long-narrow-spindle-shaped-the-sides-marked-by-about-thirty-longitudinal-ribs-without-cross-striae-when-first-deposited-they-are-greenish-yellow-turning-red-after-a-few-hours-the-young-larva-is-whitish-semi-translucent-a-few-whitish-clubbed-appendages-to-each-segment-the-mature-lar-image233714660.htmlRMRG6HC4–. The butterflies of the eastern United States. For the use of classes in zoology and private students. Butterflies; Butterflies. EASTERN UNITED STATES. 137 which is on the end of the cell. Fore wings as in the males. This species feed on senna, Cassia Marilandica, and possibly other species. The eggs are long, narrow, spindle- shaped ; the sides marked by about thirty longitudinal ribs without cross-striae. When first deposited they are greenish yellow, turning red after a few hours. The young larva is whitish, semi-translucent, a few whitish clubbed appendages to each segment. The mature lar
. The butterflies of the eastern United States. For the use of classes in zoology and private students. Butterflies -- United States Identification. EASTERN UNITED STATES. 137 which is on the end of the cell. Fore wings as in the males. This species feed on senna, Cassia Marilandica, and possibly other species. The eggs are long, narrow, spindle- shaped; the .sides marked by about thirty longitudinal ribs without cross-strise. When first deposited they are greenish yellow, turning red after a few hours. The young larva is whitish, semi-translucent, a few whitish clubbed appendages to each segm Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-butterflies-of-the-eastern-united-states-for-the-use-of-classes-in-zoology-and-private-students-butterflies-united-states-identification-eastern-united-states-137-which-is-on-the-end-of-the-cell-fore-wings-as-in-the-males-this-species-feed-on-senna-cassia-marilandica-and-possibly-other-species-the-eggs-are-long-narrow-spindle-shaped-the-sides-marked-by-about-thirty-longitudinal-ribs-without-cross-strise-when-first-deposited-they-are-greenish-yellow-turning-red-after-a-few-hours-the-young-larva-is-whitish-semi-translucent-a-few-whitish-clubbed-appendages-to-each-segm-image233714994.htmlRMRG6HT2–. The butterflies of the eastern United States. For the use of classes in zoology and private students. Butterflies -- United States Identification. EASTERN UNITED STATES. 137 which is on the end of the cell. Fore wings as in the males. This species feed on senna, Cassia Marilandica, and possibly other species. The eggs are long, narrow, spindle- shaped; the .sides marked by about thirty longitudinal ribs without cross-strise. When first deposited they are greenish yellow, turning red after a few hours. The young larva is whitish, semi-translucent, a few whitish clubbed appendages to each segm
. Zoology : for students and general readers . Zoology. THE BOniNORTNCHUS. 165 Order 1. Acanthocepliali.—These are aberrant Nematode worms (sometimes referred to a separate class), without any mouth or digestive tract, but with an extensible spiny beak, living by imbibition of the fluids of the alimentary canal of their host. The thick subcuticula is penetrated by a network of ves- sels, whose trunks form two oval bodies of unknown use called UmnUci, whicli hang down free in the body-cavity. The sexes of Ecliinorhynchus are distinct. The eggs are usually spindle-shaped. The embryo develops in Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/zoology-for-students-and-general-readers-zoology-the-boninortnchus-165-order-1-acanthoceplialithese-are-aberrant-nematode-worms-sometimes-referred-to-a-separate-class-without-any-mouth-or-digestive-tract-but-with-an-extensible-spiny-beak-living-by-imbibition-of-the-fluids-of-the-alimentary-canal-of-their-host-the-thick-subcuticula-is-penetrated-by-a-network-of-ves-sels-whose-trunks-form-two-oval-bodies-of-unknown-use-called-umnuci-whicli-hang-down-free-in-the-body-cavity-the-sexes-of-ecliinorhynchus-are-distinct-the-eggs-are-usually-spindle-shaped-the-embryo-develops-in-image231942151.htmlRMRD9TG7–. Zoology : for students and general readers . Zoology. THE BOniNORTNCHUS. 165 Order 1. Acanthocepliali.—These are aberrant Nematode worms (sometimes referred to a separate class), without any mouth or digestive tract, but with an extensible spiny beak, living by imbibition of the fluids of the alimentary canal of their host. The thick subcuticula is penetrated by a network of ves- sels, whose trunks form two oval bodies of unknown use called UmnUci, whicli hang down free in the body-cavity. The sexes of Ecliinorhynchus are distinct. The eggs are usually spindle-shaped. The embryo develops in
. The butterflies of the eastern United States. For the use of classes in zoology and private students. Butterflies. EASTERN UNITED STATES. 137 which is on the end of the cell. Fore wings as in the males. This species feed on senna, Cassia Marilandiea, and possibly other species. The eggs are long, narrow, spindle- shaped ; the sides marked by about thirty longitudinal ribs without cross-strise. When first deposited they are greenish yellow, turning red after a few hours. The young larva is whitish, semi-translucent, a few whitish clubbed appendages to each segment. The mature larva is about a Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-butterflies-of-the-eastern-united-states-for-the-use-of-classes-in-zoology-and-private-students-butterflies-eastern-united-states-137-which-is-on-the-end-of-the-cell-fore-wings-as-in-the-males-this-species-feed-on-senna-cassia-marilandiea-and-possibly-other-species-the-eggs-are-long-narrow-spindle-shaped-the-sides-marked-by-about-thirty-longitudinal-ribs-without-cross-strise-when-first-deposited-they-are-greenish-yellow-turning-red-after-a-few-hours-the-young-larva-is-whitish-semi-translucent-a-few-whitish-clubbed-appendages-to-each-segment-the-mature-larva-is-about-a-image233715114.htmlRMRG6J0A–. The butterflies of the eastern United States. For the use of classes in zoology and private students. Butterflies. EASTERN UNITED STATES. 137 which is on the end of the cell. Fore wings as in the males. This species feed on senna, Cassia Marilandiea, and possibly other species. The eggs are long, narrow, spindle- shaped ; the sides marked by about thirty longitudinal ribs without cross-strise. When first deposited they are greenish yellow, turning red after a few hours. The young larva is whitish, semi-translucent, a few whitish clubbed appendages to each segment. The mature larva is about a
. Zoology for high schools and colleges. Zoology. THE EGHINORYNCHUS. 165 Order 1. Acantliocephali.âThese are aberrant ISTematode â worms (sometimes referred to a separate class), without auy mouth or digestive tract, but with an extensible spiny beak, living by imbibition of the fluids of the alimentary canal of their host. The thick subcuticula is penetrated by a network of ves- sels, whose trunks form two oval bodies of unknown use called lemnisci, which hang down free in the body-cavity. The sexes of Ecliinorliynclius are distinct. The eggs are usually spindle-shaped. The embryo develops in Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/zoology-for-high-schools-and-colleges-zoology-the-eghinorynchus-165-order-1-acantliocephalithese-are-aberrant-istematode-worms-sometimes-referred-to-a-separate-class-without-auy-mouth-or-digestive-tract-but-with-an-extensible-spiny-beak-living-by-imbibition-of-the-fluids-of-the-alimentary-canal-of-their-host-the-thick-subcuticula-is-penetrated-by-a-network-of-ves-sels-whose-trunks-form-two-oval-bodies-of-unknown-use-called-lemnisci-which-hang-down-free-in-the-body-cavity-the-sexes-of-ecliinorliynclius-are-distinct-the-eggs-are-usually-spindle-shaped-the-embryo-develops-in-image232352409.htmlRMRE0FT9–. Zoology for high schools and colleges. Zoology. THE EGHINORYNCHUS. 165 Order 1. Acantliocephali.âThese are aberrant ISTematode â worms (sometimes referred to a separate class), without auy mouth or digestive tract, but with an extensible spiny beak, living by imbibition of the fluids of the alimentary canal of their host. The thick subcuticula is penetrated by a network of ves- sels, whose trunks form two oval bodies of unknown use called lemnisci, which hang down free in the body-cavity. The sexes of Ecliinorliynclius are distinct. The eggs are usually spindle-shaped. The embryo develops in
. The cell in development and inheritance. Cells. THE CE.XTROSOME 307 the changes of mitosis, the chromatin-network giving rise to a group of chromosomes and a spindle, or more frequently a fan-shaped half-spindle, arising from the achromatic substance. In some cases not only a complete spindle appeared but also asters at the poles, though no centrosomes were observed (Fig. 151). Morgan's experi- ments along the same lines were mainly performed upon the sea- urchin Arbacia, but included also the eggs of Asterias, Siptincnlus, and Ccrchmtitlns (Figs. 150, 151). In these eggs numerous asters may Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-cell-in-development-and-inheritance-cells-the-cextrosome-307-the-changes-of-mitosis-the-chromatin-network-giving-rise-to-a-group-of-chromosomes-and-a-spindle-or-more-frequently-a-fan-shaped-half-spindle-arising-from-the-achromatic-substance-in-some-cases-not-only-a-complete-spindle-appeared-but-also-asters-at-the-poles-though-no-centrosomes-were-observed-fig-151-morgans-experi-ments-along-the-same-lines-were-mainly-performed-upon-the-sea-urchin-arbacia-but-included-also-the-eggs-of-asterias-siptincnlus-and-ccrchmtitlns-figs-150-151-in-these-eggs-numerous-asters-may-image235049489.htmlRMRJBC0H–. The cell in development and inheritance. Cells. THE CE.XTROSOME 307 the changes of mitosis, the chromatin-network giving rise to a group of chromosomes and a spindle, or more frequently a fan-shaped half-spindle, arising from the achromatic substance. In some cases not only a complete spindle appeared but also asters at the poles, though no centrosomes were observed (Fig. 151). Morgan's experi- ments along the same lines were mainly performed upon the sea- urchin Arbacia, but included also the eggs of Asterias, Siptincnlus, and Ccrchmtitlns (Figs. 150, 151). In these eggs numerous asters may
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 8. Diagrams to illustrate structure of the ground substance of the egg of Cheetoptcrus as revealed by centrifuging. A and C, controls : the arrow in each repre- sents the direction of the centrifugal force. B and D, resultant conditions after centri- fuging ; B when the direction of the centrifugal force is as in A, D when the direc- tion of the centrifugal force is as in C. i, spindle area; 2, spongy area of control eggs > 2-2, secondary axis of centrifuged eggs ; j, dense ring-shaped zone in the ground substance ; Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-biological-bulletin-biology-zoology-biology-marine-biology-fig-8-diagrams-to-illustrate-structure-of-the-ground-substance-of-the-egg-of-cheetoptcrus-as-revealed-by-centrifuging-a-and-c-controls-the-arrow-in-each-repre-sents-the-direction-of-the-centrifugal-force-b-and-d-resultant-conditions-after-centri-fuging-b-when-the-direction-of-the-centrifugal-force-is-as-in-a-d-when-the-direc-tion-of-the-centrifugal-force-is-as-in-c-i-spindle-area-2-spongy-area-of-control-eggs-gt-2-2-secondary-axis-of-centrifuged-eggs-j-dense-ring-shaped-zone-in-the-ground-substance-image234696990.htmlRMRHRABA–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 8. Diagrams to illustrate structure of the ground substance of the egg of Cheetoptcrus as revealed by centrifuging. A and C, controls : the arrow in each repre- sents the direction of the centrifugal force. B and D, resultant conditions after centri- fuging ; B when the direction of the centrifugal force is as in A, D when the direc- tion of the centrifugal force is as in C. i, spindle area; 2, spongy area of control eggs > 2-2, secondary axis of centrifuged eggs ; j, dense ring-shaped zone in the ground substance ;
. A manual for the study of insects. Insects. i8o THE STUDY OF INSECTS. Family CliRYSOPID^ (Chry-sop'i-dae). Tlie Lace-zvinged-flies or Aphis-lions, If one will search the foliage of herbs, shrubs, or trees, there may be found, running rapidly around on the leaves, sturdy, spindle-formed, little insects that have great sickle- shaped jaws (Fig. 219). These larvae are always hungry, and will kill and eat any insects that they can overpower;. Fig. 219.—Eggs, larva, cocoon, and adult of Chrysopa, but as they are especially destructive to plant-Hce, they are called Aphis-lions. When an Aphis-lion Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-manual-for-the-study-of-insects-insects-i8o-the-study-of-insects-family-clirysopid-chry-sopi-dae-tlie-lace-zvinged-flies-or-aphis-lions-if-one-will-search-the-foliage-of-herbs-shrubs-or-trees-there-may-be-found-running-rapidly-around-on-the-leaves-sturdy-spindle-formed-little-insects-that-have-great-sickle-shaped-jaws-fig-219-these-larvae-are-always-hungry-and-will-kill-and-eat-any-insects-that-they-can-overpower-fig-219eggs-larva-cocoon-and-adult-of-chrysopa-but-as-they-are-especially-destructive-to-plant-hce-they-are-called-aphis-lions-when-an-aphis-lion-image231889669.htmlRMRD7DHW–. A manual for the study of insects. Insects. i8o THE STUDY OF INSECTS. Family CliRYSOPID^ (Chry-sop'i-dae). Tlie Lace-zvinged-flies or Aphis-lions, If one will search the foliage of herbs, shrubs, or trees, there may be found, running rapidly around on the leaves, sturdy, spindle-formed, little insects that have great sickle- shaped jaws (Fig. 219). These larvae are always hungry, and will kill and eat any insects that they can overpower;. Fig. 219.—Eggs, larva, cocoon, and adult of Chrysopa, but as they are especially destructive to plant-Hce, they are called Aphis-lions. When an Aphis-lion
. The cell in development and inheritance. Cells. THE CENTROSOME 307 the changes of mitosis, the chromatin-network giving rise to a group of chromosomes and a spindle, or more frequently a fan-shaped half-spindle, arising from the achromatic substance. In some cases not only a complete spindle appeared but also asters at the poles, though no centrosomes were observed (Fig. 151). Morgan's experi- ments along the same lines were mainly performed upon the sea- urchin Arhacia, but included also the eggs of Astei'ias, Sipujicidiis, and Cerebratulns (Figs. 150, 151). In these eggs numerous asters ma Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-cell-in-development-and-inheritance-cells-the-centrosome-307-the-changes-of-mitosis-the-chromatin-network-giving-rise-to-a-group-of-chromosomes-and-a-spindle-or-more-frequently-a-fan-shaped-half-spindle-arising-from-the-achromatic-substance-in-some-cases-not-only-a-complete-spindle-appeared-but-also-asters-at-the-poles-though-no-centrosomes-were-observed-fig-151-morgans-experi-ments-along-the-same-lines-were-mainly-performed-upon-the-sea-urchin-arhacia-but-included-also-the-eggs-of-asteiias-sipujicidiis-and-cerebratulns-figs-150-151-in-these-eggs-numerous-asters-ma-image235049138.htmlRMRJBBG2–. The cell in development and inheritance. Cells. THE CENTROSOME 307 the changes of mitosis, the chromatin-network giving rise to a group of chromosomes and a spindle, or more frequently a fan-shaped half-spindle, arising from the achromatic substance. In some cases not only a complete spindle appeared but also asters at the poles, though no centrosomes were observed (Fig. 151). Morgan's experi- ments along the same lines were mainly performed upon the sea- urchin Arhacia, but included also the eggs of Astei'ias, Sipujicidiis, and Cerebratulns (Figs. 150, 151). In these eggs numerous asters ma
![. Zoology for high schools and colleges. Zoology. HABITS OF FLUKE-WORMS. 151. occurring in the liver of a single sheep. At this time it passes into the intestine, and thence is carried out with the excre- ment. The eggs or flukes in many cases drop into pools, ditclies, or ponds ; here the cili- ated young (like Pig. 99) is liberated. Its body is spindle-shaped, with a double eye- spot. It is very active, and soon after birth enters the body of a snail (Limnceus), whei'e it transforms into a large sac, and develops new ]arv« in its interior. This sac-like larva is called a "nurse," & Stock Photo](https://c8.alamy.com/comp/RE0FWC/zoology-for-high-schools-and-colleges-zoology-habits-of-fluke-worms-151-occurring-in-the-liver-of-a-single-sheep-at-this-time-it-passes-into-the-intestine-and-thence-is-carried-out-with-the-excre-ment-the-eggs-or-flukes-in-many-cases-drop-into-pools-ditclies-or-ponds-here-the-cili-ated-young-like-pig-99-is-liberated-its-body-is-spindle-shaped-with-a-double-eye-spot-it-is-very-active-and-soon-after-birth-enters-the-body-of-a-snail-limnceus-wheie-it-transforms-into-a-large-sac-and-develops-new-arv-in-its-interior-this-sac-like-larva-is-called-a-quotnursequot-RE0FWC.jpg ". Zoology for high schools and colleges. Zoology. HABITS OF FLUKE-WORMS. 151. occurring in the liver of a single sheep. At this time it passes into the intestine, and thence is carried out with the excre- ment. The eggs or flukes in many cases drop into pools, ditclies, or ponds ; here the cili- ated young (like Pig. 99) is liberated. Its body is spindle-shaped, with a double eye- spot. It is very active, and soon after birth enters the body of a snail (Limnceus), whei'e it transforms into a large sac, and develops new ]arv« in its interior. This sac-like larva is called a "nurse," & Stock Photo")
. Zoology for high schools and colleges. Zoology. HABITS OF FLUKE-WORMS. 151. occurring in the liver of a single sheep. At this time it passes into the intestine, and thence is carried out with the excre- ment. The eggs or flukes in many cases drop into pools, ditclies, or ponds ; here the cili- ated young (like Pig. 99) is liberated. Its body is spindle-shaped, with a double eye- spot. It is very active, and soon after birth enters the body of a snail (Limnceus), whei'e it transforms into a large sac, and develops new ]arv« in its interior. This sac-like larva is called a "nurse," & Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/zoology-for-high-schools-and-colleges-zoology-habits-of-fluke-worms-151-occurring-in-the-liver-of-a-single-sheep-at-this-time-it-passes-into-the-intestine-and-thence-is-carried-out-with-the-excre-ment-the-eggs-or-flukes-in-many-cases-drop-into-pools-ditclies-or-ponds-here-the-cili-ated-young-like-pig-99-is-liberated-its-body-is-spindle-shaped-with-a-double-eye-spot-it-is-very-active-and-soon-after-birth-enters-the-body-of-a-snail-limnceus-wheie-it-transforms-into-a-large-sac-and-develops-new-arv-in-its-interior-this-sac-like-larva-is-called-a-quotnursequot-image232352440.htmlRMRE0FWC–. Zoology for high schools and colleges. Zoology. HABITS OF FLUKE-WORMS. 151. occurring in the liver of a single sheep. At this time it passes into the intestine, and thence is carried out with the excre- ment. The eggs or flukes in many cases drop into pools, ditclies, or ponds ; here the cili- ated young (like Pig. 99) is liberated. Its body is spindle-shaped, with a double eye- spot. It is very active, and soon after birth enters the body of a snail (Limnceus), whei'e it transforms into a large sac, and develops new ]arv« in its interior. This sac-like larva is called a "nurse," &
![. Carnegie Institution of Washington publication. 24 Hybridizalion of EcJiinoids. From all the evidence obtainable I have concluded that the number of chromosomes present in these eggs is 37 and 38. This difference is due to the fact that half of the eggs contain a single V-shaped chro- mosome, this shape being due to the atelomitic attachment of spindle fibers, and the remaining half a pair of these V-shaped elements. '^,//'0 ^''^^"IWS^^ I..) (I M M'/J/' i^Uiinl |V^' h a. h K't'f// c Fig. G, a, h, and c. Three successive sections of a first-cleavage am- phiaster, 35-41. Two heterochromos Stock Photo](https://c8.alamy.com/comp/RFRH8A/carnegie-institution-of-washington-publication-24-hybridizalion-of-ecjiinoids-from-all-the-evidence-obtainable-i-have-concluded-that-the-number-of-chromosomes-present-in-these-eggs-is-37-and-38-this-difference-is-due-to-the-fact-that-half-of-the-eggs-contain-a-single-v-shaped-chro-mosome-this-shape-being-due-to-the-atelomitic-attachment-of-spindle-fibers-and-the-remaining-half-a-pair-of-these-v-shaped-elements-0-quotiws-i-i-m-mj-iuiinl-v-h-a-h-ktf-c-fig-g-a-h-and-c-three-successive-sections-of-a-first-cleavage-am-phiaster-35-41-two-heterochromos-RFRH8A.jpg ". Carnegie Institution of Washington publication. 24 Hybridizalion of EcJiinoids. From all the evidence obtainable I have concluded that the number of chromosomes present in these eggs is 37 and 38. This difference is due to the fact that half of the eggs contain a single V-shaped chro- mosome, this shape being due to the atelomitic attachment of spindle fibers, and the remaining half a pair of these V-shaped elements. '^,//'0 ^''^^"IWS^^ I..) (I M M'/J/' i^Uiinl |V^' h a. h K't'f// c Fig. G, a, h, and c. Three successive sections of a first-cleavage am- phiaster, 35-41. Two heterochromos Stock Photo")
. Carnegie Institution of Washington publication. 24 Hybridizalion of EcJiinoids. From all the evidence obtainable I have concluded that the number of chromosomes present in these eggs is 37 and 38. This difference is due to the fact that half of the eggs contain a single V-shaped chro- mosome, this shape being due to the atelomitic attachment of spindle fibers, and the remaining half a pair of these V-shaped elements. '^,//'0 ^''^^"IWS^^ I..) (I M M'/J/' i^Uiinl |V^' h a. h K't'f// c Fig. G, a, h, and c. Three successive sections of a first-cleavage am- phiaster, 35-41. Two heterochromos Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/carnegie-institution-of-washington-publication-24-hybridizalion-of-ecjiinoids-from-all-the-evidence-obtainable-i-have-concluded-that-the-number-of-chromosomes-present-in-these-eggs-is-37-and-38-this-difference-is-due-to-the-fact-that-half-of-the-eggs-contain-a-single-v-shaped-chro-mosome-this-shape-being-due-to-the-atelomitic-attachment-of-spindle-fibers-and-the-remaining-half-a-pair-of-these-v-shaped-elements-0-quotiws-i-i-m-mj-iuiinl-v-h-a-h-ktf-c-fig-g-a-h-and-c-three-successive-sections-of-a-first-cleavage-am-phiaster-35-41-two-heterochromos-image233473082.htmlRMRFRH8A–. Carnegie Institution of Washington publication. 24 Hybridizalion of EcJiinoids. From all the evidence obtainable I have concluded that the number of chromosomes present in these eggs is 37 and 38. This difference is due to the fact that half of the eggs contain a single V-shaped chro- mosome, this shape being due to the atelomitic attachment of spindle fibers, and the remaining half a pair of these V-shaped elements. '^,//'0 ^''^^"IWS^^ I..) (I M M'/J/' i^Uiinl |V^' h a. h K't'f// c Fig. G, a, h, and c. Three successive sections of a first-cleavage am- phiaster, 35-41. Two heterochromos
![. The cell in development and inheritance. Cells. Oi/A;!,,, -/ v//ii;W/.''i> B Fig. 151. — Formation of centiosomes and asters in unfertilized echinoderm-eggs. A, B, Morgan ; C-E, R. Hf.rtvvig.] A. Arbacia, after 4V2 liours in 1.5 % solution of sodium chloride, then 5 hours in sea-water; scattered chromosomes and asters. B. Asters formed after 6V2 hours in NaCl. C-E. Echinus after treatment with 0.5 % strychnine-solution, showing various forms of astral formations (fan- shaped aster, half spindle, and complete mitotic figure). are believed by Morgan to arise de novo from the tgg substa Stock Photo](https://c8.alamy.com/comp/RJBC02/the-cell-in-development-and-inheritance-cells-oia!-viiwigt-b-fig-151-formation-of-centiosomes-and-asters-in-unfertilized-echinoderm-eggs-a-b-morgan-c-e-r-hfrtvvig-a-arbacia-after-4v2-liours-in-15-solution-of-sodium-chloride-then-5-hours-in-sea-water-scattered-chromosomes-and-asters-b-asters-formed-after-6v2-hours-in-nacl-c-e-echinus-after-treatment-with-05-strychnine-solution-showing-various-forms-of-astral-formations-fan-shaped-aster-half-spindle-and-complete-mitotic-figure-are-believed-by-morgan-to-arise-de-novo-from-the-tgg-substa-RJBC02.jpg ". The cell in development and inheritance. Cells. Oi/A;!,,, -/ v//ii;W/.''i> B Fig. 151. — Formation of centiosomes and asters in unfertilized echinoderm-eggs. A, B, Morgan ; C-E, R. Hf.rtvvig.] A. Arbacia, after 4V2 liours in 1.5 % solution of sodium chloride, then 5 hours in sea-water; scattered chromosomes and asters. B. Asters formed after 6V2 hours in NaCl. C-E. Echinus after treatment with 0.5 % strychnine-solution, showing various forms of astral formations (fan- shaped aster, half spindle, and complete mitotic figure). are believed by Morgan to arise de novo from the tgg substa Stock Photo")
. The cell in development and inheritance. Cells. Oi/A;!,,, -/ v//ii;W/.''i> B Fig. 151. — Formation of centiosomes and asters in unfertilized echinoderm-eggs. A, B, Morgan ; C-E, R. Hf.rtvvig.] A. Arbacia, after 4V2 liours in 1.5 % solution of sodium chloride, then 5 hours in sea-water; scattered chromosomes and asters. B. Asters formed after 6V2 hours in NaCl. C-E. Echinus after treatment with 0.5 % strychnine-solution, showing various forms of astral formations (fan- shaped aster, half spindle, and complete mitotic figure). are believed by Morgan to arise de novo from the tgg substa Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-cell-in-development-and-inheritance-cells-oia!-viiwigt-b-fig-151-formation-of-centiosomes-and-asters-in-unfertilized-echinoderm-eggs-a-b-morgan-c-e-r-hfrtvvig-a-arbacia-after-4v2-liours-in-15-solution-of-sodium-chloride-then-5-hours-in-sea-water-scattered-chromosomes-and-asters-b-asters-formed-after-6v2-hours-in-nacl-c-e-echinus-after-treatment-with-05-strychnine-solution-showing-various-forms-of-astral-formations-fan-shaped-aster-half-spindle-and-complete-mitotic-figure-are-believed-by-morgan-to-arise-de-novo-from-the-tgg-substa-image235049474.htmlRMRJBC02–. The cell in development and inheritance. Cells. Oi/A;!,,, -/ v//ii;W/.''i> B Fig. 151. — Formation of centiosomes and asters in unfertilized echinoderm-eggs. A, B, Morgan ; C-E, R. Hf.rtvvig.] A. Arbacia, after 4V2 liours in 1.5 % solution of sodium chloride, then 5 hours in sea-water; scattered chromosomes and asters. B. Asters formed after 6V2 hours in NaCl. C-E. Echinus after treatment with 0.5 % strychnine-solution, showing various forms of astral formations (fan- shaped aster, half spindle, and complete mitotic figure). are believed by Morgan to arise de novo from the tgg substa
