Clitellum hi-res stock photography and images

Earthworm - showing clitellum Stock Photo

RM2XKX110–Earthworm - showing clitellum

EARTHWORM OR NIGHTCRAWLERS (LUMBRICUS TERRESTRIS) SHOWING CLITELLUM, GIRDLE, DARK COLORED ANTERIOR AND SEGMENTATION Stock Photo

RMB3KB6W–EARTHWORM OR NIGHTCRAWLERS (LUMBRICUS TERRESTRIS) SHOWING CLITELLUM, GIRDLE, DARK COLORED ANTERIOR AND SEGMENTATION

Brandling worm (Eisenia foetida), a lover of compost heaps, in a garden and showing the clitellum UK Stock Photo

RMBKR459–Brandling worm (Eisenia foetida), a lover of compost heaps, in a garden and showing the clitellum UK

Segmented worm (Annelida) showing swollen middle section Stock Photo

RMPFMDPT–Segmented worm (Annelida) showing swollen middle section

Closeup of earthworm body showing yellow clitellum and digestive track, Satara, Maharashtra, India Stock Photo

RF2E1HKRB–Closeup of earthworm body showing yellow clitellum and digestive track, Satara, Maharashtra, India

Common earthworm illustration against white background Stock Photo

RF2GWG50N–Common earthworm illustration against white background

common earthworm, earthworm; lob worm, dew worm, squirreltail worm, twachel (Lumbricus terrestris), close-up of the clitellum Stock Photo

RMEBN24D–common earthworm, earthworm; lob worm, dew worm, squirreltail worm, twachel (Lumbricus terrestris), close-up of the clitellum

Tubifex tubifex, sludge worm, or sewage worm Stock Photo

RF2G4R4B0–Tubifex tubifex, sludge worm, or sewage worm

Leech Dissection which is share a clitellum and are hermaphrodites, vintage line drawing or engraving illustration. Stock Vector

RFT61FDK–Leech Dissection which is share a clitellum and are hermaphrodites, vintage line drawing or engraving illustration.

Amsterdam The Netherlands 14th March 2024 Earthworm in a hand of a gardener on an allotment with the clitellum visible. gardening, soil, worm, worms, animal, moestuin, Stock Photo

RM2WRXGWR–Amsterdam The Netherlands 14th March 2024 Earthworm in a hand of a gardener on an allotment with the clitellum visible. gardening, soil, worm, worms, animal, moestuin,

RFHRJ1ET–Earthworm

Tangled mass of earthworms on soil surface Stock Photo

RMAGE871–Tangled mass of earthworms on soil surface

Common Earthworm, Lumbricus terrestris. On ground Stock Photo

RMAWG6TW–Common Earthworm, Lumbricus terrestris. On ground

Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy Stock Photo

RFR5T3CH–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy

Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy Stock Photo

RFR5T3CK–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy

common leech hirudo medicinalis Stock Photo

RMBC3A46–common leech hirudo medicinalis

A pink worm in a brown hat stuck with oval-shaped green leaf has two eyes and keenly looks while raising its head, vector, color drawing or illustrati Stock Vector

RFT8FT4B–A pink worm in a brown hat stuck with oval-shaped green leaf has two eyes and keenly looks while raising its head, vector, color drawing or illustrati

. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects . kemost other worms, it bears a considerable varietyof names, but it is entered in Beddards Mono-graph of the Oligochaeta, which is our standardwork on Annelids, under the title Allolobophoracyanea (Savigny). He gives the followingaccount of it. The length is 120 mm., the breadth7 mm., and the number of segments 156. Thegirdle or clitellum extends from segment 29 tosegment 34, and the tubercula pubertatis are on30 to 33. The bristles or setae are not strictlypaired. The colour is dirty-grey, with a p Stock Photo

RM2CDX3PP–. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects . kemost other worms, it bears a considerable varietyof names, but it is entered in Beddards Mono-graph of the Oligochaeta, which is our standardwork on Annelids, under the title Allolobophoracyanea (Savigny). He gives the followingaccount of it. The length is 120 mm., the breadth7 mm., and the number of segments 156. Thegirdle or clitellum extends from segment 29 tosegment 34, and the tubercula pubertatis are on30 to 33. The bristles or setae are not strictlypaired. The colour is dirty-grey, with a p

Earthworm or Lumbricus terrestris, vintage engraved illustration. Dictionary of Words and Things - Larive and Fleury - 1895 Stock Vector

RFEW9CYB–Earthworm or Lumbricus terrestris, vintage engraved illustration. Dictionary of Words and Things - Larive and Fleury - 1895

Common Earthworm (Lumbricus terrestris) in soil, Morrison Colorado US Stock Photo

RMBBH65J–Common Earthworm (Lumbricus terrestris) in soil, Morrison Colorado US

RF2GXXAGN–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

Close up shot of earthworms mating in damp soil after rain storm Stock Photo

RF2X21H62–Close up shot of earthworms mating in damp soil after rain storm

Redhead Worm - Lumbricus rubellus - in a garden soil. The yypical size of adult is 6.5cm. The upper surface of the body, from the first segment to the Stock Photo

RF2FNWDKC–Redhead Worm - Lumbricus rubellus - in a garden soil. The yypical size of adult is 6.5cm. The upper surface of the body, from the first segment to the

RMBWP1NM–Compost bin

Closeup macro large earthworm slithering through dirt and gravel Stock Photo

RF2H9EBNF–Closeup macro large earthworm slithering through dirt and gravel

RF2GXXAHE–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

Tubifex is a cosmopolitan genus Stock Photo

RF2G4R4AP–Tubifex is a cosmopolitan genus

. The earthworms (lumbricidae and sparganophilidae) of Ontario . SADDLE ANNULAR In the case of Eisenia rosea the clitellum has been termed flared. This ventral flared condition is easily recognizable. Stock Photo

RMMAB065–. The earthworms (lumbricidae and sparganophilidae) of Ontario . SADDLE ANNULAR In the case of Eisenia rosea the clitellum has been termed flared. This ventral flared condition is easily recognizable.

Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida Stock Photo

RF2HYFM2J–Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida

Archive image from page 304 of Discovery reports (1932) Discovery reports discoveryreports04inst Year: 1932 MEGASCOLECIDAE 283 Prostomium epilobic {,. Clitellum |i3-|i6, complete ventrally. Copulatory papillae absent. Dorsal pores present from intersegment 8/9 backwards, except in the clitellar region where pores are apparently absent. Nephridial pores on the anterior Stock Photo

RMT246RG–Archive image from page 304 of Discovery reports (1932) Discovery reports discoveryreports04inst Year: 1932 MEGASCOLECIDAE 283 Prostomium epilobic {,. Clitellum |i3-|i6, complete ventrally. Copulatory papillae absent. Dorsal pores present from intersegment 8/9 backwards, except in the clitellar region where pores are apparently absent. Nephridial pores on the anterior

Earthworm anatomy illustration Stock Photo

RF2G4R450–Earthworm anatomy illustration

Common Earthworm, Lumbricus terrestris. Head close-up Stock Photo

RMAWX57M–Common Earthworm, Lumbricus terrestris. Head close-up

RFK7M30G–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

horse leech haemopis sanguisorba skate sucker albione muricata Stock Photo

RMBC3A4C–horse leech haemopis sanguisorba skate sucker albione muricata

. Animal biology. Zoology; Biology. WWII Clitellum. 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.. Wolcott, Robert Henry, 1868-1934. New York ; London : McGraw-Hill Book Company, Inc. Stock Photo

RMRN560J–. Animal biology. Zoology; Biology. WWII Clitellum. 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.. Wolcott, Robert Henry, 1868-1934. New York ; London : McGraw-Hill Book Company, Inc.

RFEW9R5M–Earthworm or Lumbricus terrestris, vintage engraved illustration. Dictionary of Words and Things - Larive and Fleury - 1895

A brown worm with body segmented has two eyes rolled up peeps out of the apple fruit with a green leaf on the stalk looks cute and lovely over white b Stock Vector

RFT8FT4A–A brown worm with body segmented has two eyes rolled up peeps out of the apple fruit with a green leaf on the stalk looks cute and lovely over white b

RF2GXXAGF–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RF2X21H5H–Close up shot of earthworms mating in damp soil after rain storm

RF2FNWDKH–Redhead Worm - Lumbricus rubellus - in a garden soil. The yypical size of adult is 6.5cm. The upper surface of the body, from the first segment to the

RMBWP1WD–Compost bin

RF2H9EBMW–Closeup macro large earthworm slithering through dirt and gravel

RF2GXXAG6–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Earthworms and their allies . Fig. 4. The same species. Ventral view of segments xvi-xx (numbered in the figure) which form the clitellum, the posterior boundary of which is shown by a curved line on segment xx. The figure will be understood from the annexed description. minute pair of pores on segment xviii do not take up the position of the ventral setae; for these are present and to the inside of each pore. A groove, shaped something like a reversed 3 or the Greek letter X, connects the orifices of each side of the body, the middle part of the groove, where the two semicircular halves of Stock Photo

RMMAAY2G–. Earthworms and their allies . Fig. 4. The same species. Ventral view of segments xvi-xx (numbered in the figure) which form the clitellum, the posterior boundary of which is shown by a curved line on segment xx. The figure will be understood from the annexed description. minute pair of pores on segment xviii do not take up the position of the ventral setae; for these are present and to the inside of each pore. A groove, shaped something like a reversed 3 or the Greek letter X, connects the orifices of each side of the body, the middle part of the groove, where the two semicircular halves of

Elementary textbook of economic zoology Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] EARTHWORMS, LEECHES, ETC. 103 They pass through the septum between the thirteenth and fourteenth segments and open through the ventral wall of the fourteenth segment. The sperm cells do not fertilize the ova from the same individual. When the reproductive elements are ripe, two worms mate and there is a transference of spermatozoa from each individual to the other. The clitellum then becomes very much swollen, and finally forms a collar- like structure about th Stock Photo

RMRYR12W–Elementary textbook of economic zoology Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] EARTHWORMS, LEECHES, ETC. 103 They pass through the septum between the thirteenth and fourteenth segments and open through the ventral wall of the fourteenth segment. The sperm cells do not fertilize the ova from the same individual. When the reproductive elements are ripe, two worms mate and there is a transference of spermatozoa from each individual to the other. The clitellum then becomes very much swollen, and finally forms a collar- like structure about th

RMAWY38E–Common Earthworm, Lumbricus terrestris. On ground

RFK7M2Y3–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Animal biology. Zoology; Biology. XXXVII Clitellum. 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.. Wolcott, Robert Henry, 1868-1934; University of Nebraska (Lincoln campus). Dept. of Zoology. New York ; London : McGraw-Hill Book Company, Inc. Stock Photo

RMRN5HRT–. Animal biology. Zoology; Biology. XXXVII Clitellum. 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.. Wolcott, Robert Henry, 1868-1934; University of Nebraska (Lincoln campus). Dept. of Zoology. New York ; London : McGraw-Hill Book Company, Inc.

RF2GXXAHT–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RF2X21H57–Close up shot of earthworms mating in damp soil after rain storm

RMBWP1RG–Compost bin

RF2GXXAKE–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RMMAAYB7–. Earthworms and their allies . Fig. 4. The same species. Ventral view of segments xvi-xx (numbered in the figure) which form the clitellum, the posterior boundary of which is shown by a curved line on segment xx. The figure will be understood from the annexed description. minute pair of pores on segment xvm do not take up the position of the ventral setae; for these are present and to the inside of each pore. A groove, shaped something like a reversed 3 or the Greek letter 2, connects the orifices of each side of the body, the middle part of the groove, where the two semicircular halves of wh

Elementary entomology elementaryentomo00sand Year: [c1912] PART I. THE STRUCTURE AND GROWTH OF INSECTS CHAPTER II INSECTS AND THEIR NEAR RELATIVES If we are to study insects, it is necessary that we should have a clear conception of just what an insect is and how insects may be distinguished from other animals. Most of us recognize bees, flies, beetles, and butterflies as insects, but other forms of insect life we C FIG. i. Earthworm m, mouth ; r, girdle, or clitellum. (After Jordan and Heath) ' worms,' and various insectlike animals are should probably call commonly termed ' insects.' The a Stock Photo

RMRYEGM6–Elementary entomology elementaryentomo00sand Year: [c1912] PART I. THE STRUCTURE AND GROWTH OF INSECTS CHAPTER II INSECTS AND THEIR NEAR RELATIVES If we are to study insects, it is necessary that we should have a clear conception of just what an insect is and how insects may be distinguished from other animals. Most of us recognize bees, flies, beetles, and butterflies as insects, but other forms of insect life we C FIG. i. Earthworm m, mouth ; r, girdle, or clitellum. (After Jordan and Heath) ' worms,' and various insectlike animals are should probably call commonly termed ' insects.' The a

RFK7M30F–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. The earthworms (lumbricidae and sparganophilidae) of Ontario. Lumbricidae; Worms. SADDLE ANNULAR In the case of Eisenia rosea the clitellum has been termed flared. This ventral flared condition is easily recognizable.. 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.. Reynolds, John W. , 1941-; Royal Ontario Museum. Toronto : Royal Ontario Museum Stock Photo

RMRE659E–. The earthworms (lumbricidae and sparganophilidae) of Ontario. Lumbricidae; Worms. SADDLE ANNULAR In the case of Eisenia rosea the clitellum has been termed flared. This ventral flared condition is easily recognizable.. 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.. Reynolds, John W. , 1941-; Royal Ontario Museum. Toronto : Royal Ontario Museum

RF2X21H5F–Close up shot of earthworms mating in damp soil after rain storm

RF2GXXAGG–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. The earthworms (lumbricidae and sparganophilidae) of Ontario . girdle See clitellum. gizzard (Fr. gesier m.) (g) The muscularized portion of the digestive system, in Lumbricidae, anterior to the intestine and posterior to the crop (Fig. 2). gonopore (Fr. gonopore m.) See male pores, female pores. hearts (Fr. coeurs m.) (h) The enlarged, segmental, pulsating connectives of the blood system between the ventral and one or two other longitudinal trunks (e.g., dorsal and/or supra-oesophageal) (Fig. 2). hemerobiont A species dependent on human culture. hemerodiaphore A species indifferent to the i Stock Photo

RMMAB020–. The earthworms (lumbricidae and sparganophilidae) of Ontario . girdle See clitellum. gizzard (Fr. gesier m.) (g) The muscularized portion of the digestive system, in Lumbricidae, anterior to the intestine and posterior to the crop (Fig. 2). gonopore (Fr. gonopore m.) See male pores, female pores. hearts (Fr. coeurs m.) (h) The enlarged, segmental, pulsating connectives of the blood system between the ventral and one or two other longitudinal trunks (e.g., dorsal and/or supra-oesophageal) (Fig. 2). hemerobiont A species dependent on human culture. hemerodiaphore A species indifferent to the i

Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] PART I. THE STRUCTURE AND GROWTH OF INSECTS CHAPTER II INSECTS AND THEIR NEAR RELATIVES If we are to study insects, it is necessary that we should have a clear conception of just what an insect is and how insects may be distinguished from other animals. Most of us recognize bees, flies, beetles, and butterflies as insects, but other forms of insect life we C FIG. i. Earthworm m, mouth ; r, girdle, or clitellum. (After Jordan and Heath) ' worms,' and various insectlike animals are should probably call co Stock Photo

RMRWNYHG–Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] PART I. THE STRUCTURE AND GROWTH OF INSECTS CHAPTER II INSECTS AND THEIR NEAR RELATIVES If we are to study insects, it is necessary that we should have a clear conception of just what an insect is and how insects may be distinguished from other animals. Most of us recognize bees, flies, beetles, and butterflies as insects, but other forms of insect life we C FIG. i. Earthworm m, mouth ; r, girdle, or clitellum. (After Jordan and Heath) ' worms,' and various insectlike animals are should probably call co

RFK7M2T9–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2IO FOOTE AND STROBELL. on single worms, was to dump daily several pots, each contain- ing one hundred worms and carefully to examine the clitellum of each worm. The presence of a slime-tube, with or without a cocoon, can be detected, by constrictions at each end of the cli- tellum. These constrictions are very marked when the worm is contracted and difficult to see when the worm stretches out. When the worm succeeds in partially escaping from the slime- tube, one or both constrictions can be seen on, or near, the cli- tellu Stock Photo

RMRHPD30–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2IO FOOTE AND STROBELL. on single worms, was to dump daily several pots, each contain- ing one hundred worms and carefully to examine the clitellum of each worm. The presence of a slime-tube, with or without a cocoon, can be detected, by constrictions at each end of the cli- tellum. These constrictions are very marked when the worm is contracted and difficult to see when the worm stretches out. When the worm succeeds in partially escaping from the slime- tube, one or both constrictions can be seen on, or near, the cli- tellu

RF2GXXAMN–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

Elements of biology, with special Elements of biology, with special reference to their rÃ´le in the lives of animals elementsofbiolog00buch Year: 1933 MULTICELLULAR ANIMALS 139 PROSTOMIUM SEGMENT 10 SEGMENT 14 SEGMENT 15 CLITELLUM 'iEGMENTS 31-37 MOUTH SPERMATHECAL OPENINGS OVIDUCT OPENING SPERM DUCT OPENING â SEGMENT larger space required by reproductive and excretory organs, fill the ccelom and its divisions (Fig. 65). The distinctive feature of the Annelida is the division of the body into segments or meta- meres. Metamerism is most highly developed in this phy- lum; it continues to be Stock Photo

RMRWPPPJ–Elements of biology, with special Elements of biology, with special reference to their rÃ´le in the lives of animals elementsofbiolog00buch Year: 1933 MULTICELLULAR ANIMALS 139 PROSTOMIUM SEGMENT 10 SEGMENT 14 SEGMENT 15 CLITELLUM 'iEGMENTS 31-37 MOUTH SPERMATHECAL OPENINGS OVIDUCT OPENING SPERM DUCT OPENING â SEGMENT larger space required by reproductive and excretory organs, fill the ccelom and its divisions (Fig. 65). The distinctive feature of the Annelida is the division of the body into segments or meta- meres. Metamerism is most highly developed in this phy- lum; it continues to be

RFK7M2XW–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Biology; the story of living things. 188 ORGANISMS ILLUSTRATING BIOLOGICAL PRINCIPLES distinguished by the rounded mouth which is just ventral to or under a small protuberance, the 'prostomium, while the anus, or posterior end of the digestive tract, is a tiny slit in the last segment. The posterior end is also flattened, and between segments 32 to 37, not counting the prostomium enclosing the mouth as the first, there is found a swollen region, called the clitellum, important in reproduction. The upper or dorsal side may be distinguished by its darker color, while the ventral side is slight Stock Photo

RMRHJX5M–. Biology; the story of living things. 188 ORGANISMS ILLUSTRATING BIOLOGICAL PRINCIPLES distinguished by the rounded mouth which is just ventral to or under a small protuberance, the 'prostomium, while the anus, or posterior end of the digestive tract, is a tiny slit in the last segment. The posterior end is also flattened, and between segments 32 to 37, not counting the prostomium enclosing the mouth as the first, there is found a swollen region, called the clitellum, important in reproduction. The upper or dorsal side may be distinguished by its darker color, while the ventral side is slight

RF2GXXAM5–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFT420YX–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Enchytræidæ of the west coast of North America. Enchytraeidae; Annelida. 112 EISEN son, the well-known zoologist, to whom I am indebted for several interesting Oligochieta. Characteristics. —This species is characterized by its spermathecEe without diverticles and by the position of its chylus cells in somites X, XI and XII. In most other species the chylus cells are found in somites posterior to clitellum.. Fig. 72. Fridericia johnsont. Chylus cells.—The unusual position of these cells has just been mentioned. The cells are long and narrow, with somewhat warty surface. The nucleus is oval, Stock Photo

RMREKE54–. Enchytræidæ of the west coast of North America. Enchytraeidae; Annelida. 112 EISEN son, the well-known zoologist, to whom I am indebted for several interesting Oligochieta. Characteristics. —This species is characterized by its spermathecEe without diverticles and by the position of its chylus cells in somites X, XI and XII. In most other species the chylus cells are found in somites posterior to clitellum.. Fig. 72. Fridericia johnsont. Chylus cells.—The unusual position of these cells has just been mentioned. The cells are long and narrow, with somewhat warty surface. The nucleus is oval,

RF2GXXAGJ–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFK7M2TY–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

$. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. 36 Clltellum.— The clitellar cells small, narrow, and not prominent; extend all around the body. The clitellar cells and the transverse layer of muscles together equal in thickness the longitudinal layer of muscles. All through the body the longitudinal layer is unusually developed. Outside of the clitellum the epithelium and the transverse layer measure one unit each, while the longitudinal layer alone measures thirteen units. Spermathccce {^^. i^h). — Only one specimen dissected. Both sper- mathecae found to be of the same Stock Photo$

RMRPXR8E–. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. 36 Clltellum.— The clitellar cells small, narrow, and not prominent; extend all around the body. The clitellar cells and the transverse layer of muscles together equal in thickness the longitudinal layer of muscles. All through the body the longitudinal layer is unusually developed. Outside of the clitellum the epithelium and the transverse layer measure one unit each, while the longitudinal layer alone measures thirteen units. Spermathccce {^^. i^h). — Only one specimen dissected. Both sper- mathecae found to be of the same

RF2GXXAK9–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFK7M2XH–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

$. Enchytræidæ of the west coast of North America. Enchytraeidae; Annelida. 36 EISEN Clitellum.— The clitellar cells small, narrow, and not prominent; extend all around the body. The clitellar cells and the transverse layer of muscles together equal in thickness the longitudinal layer of muscles. All through the body the longitudinal layer is unusually developed. Outside of the clitellum the epithelium and the transverse layer measure one unit each, while the longitudinal layer alone measures thirteen units. Spermathccce {^g. I4<5). — Only one specimen dissected. Both sper- mathecEe found to Stock Photo$

RMREN3G6–. Enchytræidæ of the west coast of North America. Enchytraeidae; Annelida. 36 EISEN Clitellum.— The clitellar cells small, narrow, and not prominent; extend all around the body. The clitellar cells and the transverse layer of muscles together equal in thickness the longitudinal layer of muscles. All through the body the longitudinal layer is unusually developed. Outside of the clitellum the epithelium and the transverse layer measure one unit each, while the longitudinal layer alone measures thirteen units. Spermathccce {^g. I4<5). — Only one specimen dissected. Both sper- mathecEe found to

RF2GXXAKB–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFK7M2XC–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. A manual of elementary zoology . Zoology. 216 MANUAL OF ELEMENTARY ZOOLOGY the peristomium.1 There are about 150 segments. At about one-third of the length of the body from its front ,,, end, in segments 32-37 inclusive, a glandular thickening of the epider- mis lies athwart the back like a saddle and is often mistaken for the scar of a wound. This is known as the clitellum. The skin of the worm is brownish above and paler below; it is covered with a fine, tough, iridescent cuticle secreted by the underlying cells. In every segment except the first and the last there are eight bristles or se Stock Photo

RMRDHR80–. A manual of elementary zoology . Zoology. 216 MANUAL OF ELEMENTARY ZOOLOGY the peristomium.1 There are about 150 segments. At about one-third of the length of the body from its front ,,, end, in segments 32-37 inclusive, a glandular thickening of the epider- mis lies athwart the back like a saddle and is often mistaken for the scar of a wound. This is known as the clitellum. The skin of the worm is brownish above and paler below; it is covered with a fine, tough, iridescent cuticle secreted by the underlying cells. In every segment except the first and the last there are eight bristles or se

RF2GXXAHM–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFK7M2XN–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Annual report of the Michigan Academy of Science. Michigan Academy of Science; Science -- Michigan; Plants -- Michigan. 200 MICHIGAN ACADEMY OF SCIENCE. VARIATION AND CORRELATION IN THE EARTHWORM. RAYMOND PEARL AND WILBUR N. FULLER. (Abstract.) A statistical study of variation in the common earthworm, Lumhricus agricola Hoffm.. included the following characters: I. The total number of somites in the body. II. The total length of the body. III. The number of somites from the anterior end of the worm to the clitellum. IV. The number of somites in the clitellum. The worms measured were all coll Stock Photo

RMRM8XDC–. Annual report of the Michigan Academy of Science. Michigan Academy of Science; Science -- Michigan; Plants -- Michigan. 200 MICHIGAN ACADEMY OF SCIENCE. VARIATION AND CORRELATION IN THE EARTHWORM. RAYMOND PEARL AND WILBUR N. FULLER. (Abstract.) A statistical study of variation in the common earthworm, Lumhricus agricola Hoffm.. included the following characters: I. The total number of somites in the body. II. The total length of the body. III. The number of somites from the anterior end of the worm to the clitellum. IV. The number of somites in the clitellum. The worms measured were all coll

RF2GXXAJ8–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFK7M311–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LEECH GROWTH AND REPRODUCTION 329 (Mann, 1962), thus minimizing the distance that the sperm released from the implanted spermatophore have to migrate to reach the eggs. Gravid leeches could be recognized some weeks before they laid eggs, by a whitish clitellum that appeared in the ventral region surrounding the gonopores. Closer to the time of egg-laying, a large yellow area, showing yolky eggs in the ovisacs, could be seen on the ventral midline posterior to the gonopores. About 2 weeks before leeches laid eggs, the ventral Stock Photo

RMRHKRBB–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LEECH GROWTH AND REPRODUCTION 329 (Mann, 1962), thus minimizing the distance that the sperm released from the implanted spermatophore have to migrate to reach the eggs. Gravid leeches could be recognized some weeks before they laid eggs, by a whitish clitellum that appeared in the ventral region surrounding the gonopores. Closer to the time of egg-laying, a large yellow area, showing yolky eggs in the ovisacs, could be seen on the ventral midline posterior to the gonopores. About 2 weeks before leeches laid eggs, the ventral

RF2GXXAJ7–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFK7M304–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Breviora. BREVIORA NO. 81 is nearly circular in transverse section and deeply grooved on each side clear to level of the small median ridge on the ventral face. The grooves appear to be exactly opposite each other (not alternate) and produce, on each side, a series of laterally di- rected, haU'moon-shaped leaflets. Superficially, as previously suggested, the appearance suggests a stack of coins with a cord running along it. Behind the clitellum the lateral grooving gradually disappears and the typhlosole becomes more nearly thickly laraelliform. The grooving is typical, characterizing each o Stock Photo

RMRH57AE–. Breviora. BREVIORA NO. 81 is nearly circular in transverse section and deeply grooved on each side clear to level of the small median ridge on the ventral face. The grooves appear to be exactly opposite each other (not alternate) and produce, on each side, a series of laterally di- rected, haU'moon-shaped leaflets. Superficially, as previously suggested, the appearance suggests a stack of coins with a cord running along it. Behind the clitellum the lateral grooving gradually disappears and the typhlosole becomes more nearly thickly laraelliform. The grooving is typical, characterizing each o

RF2GXXAN3–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFT42112–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. A first book of zoology [microform]. Zoology; Zoologie. H ZOOLOGY tilizing substance and egga, but just as in plants the ova are generally fertilized by means of the pollen from another plant, so also in the worm cross-fertilization occurs. When the eggs are about to be laid, the skin in the clitellum region actively secretes or produces a fluid which exposure to the air converts into an elastic substance. Thus the clitellum region appears to be surrounded by a broad elastic ring or cocoon. The earthworm next begins to wriggle backwards out of the cocoon, and so the latter is pushed nearer a Stock Photo

RMREPBDC–. A first book of zoology [microform]. Zoology; Zoologie. H ZOOLOGY tilizing substance and egga, but just as in plants the ova are generally fertilized by means of the pollen from another plant, so also in the worm cross-fertilization occurs. When the eggs are about to be laid, the skin in the clitellum region actively secretes or produces a fluid which exposure to the air converts into an elastic substance. Thus the clitellum region appears to be surrounded by a broad elastic ring or cocoon. The earthworm next begins to wriggle backwards out of the cocoon, and so the latter is pushed nearer a

RF2GXXAGM–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFT4211E–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Animal biology; Human biology. Parts II & III of First course in biology. Biology. WORMS 47 egg cells. The reproductive girdle, or clitellum, already spoken of, forms the case which is to hold the eggs (see Fig. 71). When the sperm cells have been exchanged, and the ova are ready for fertili- zation, the worm draws itself backward from the collar-like case or clitellum so that this slips over the head. As it passes the four- teenth segment, it collects the ova, and as it passes the ninth and tenth segments, it collects the sperm cells previously received from another worm. The elastic, c Stock Photo

RMRN5MMD–. Animal biology; Human biology. Parts II & III of First course in biology. Biology. WORMS 47 egg cells. The reproductive girdle, or clitellum, already spoken of, forms the case which is to hold the eggs (see Fig. 71). When the sperm cells have been exchanged, and the ova are ready for fertili- zation, the worm draws itself backward from the collar-like case or clitellum so that this slips over the head. As it passes the four- teenth segment, it collects the ova, and as it passes the ninth and tenth segments, it collects the sperm cells previously received from another worm. The elastic, c

RF2GXXAMG–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFT4212J–Leech on the tweezers. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Elementary entomology. Entomology. PART I. THE STRUCTURE AND GROWTH OF INSECTS CHAPTER II INSECTS AND THEIR NEAR RELATIVES If we are to study insects, it is necessary that we should have a clear conception of just what an insect is and how insects may be distinguished from other animals. Most of us recognize bees, flies, beetles, and butterflies as insects, but other forms of insect life we Fig. I. Earthworm w, mouth ; c, girdle, or clitellum. (After Jordan and Heath) should probably call "worms," and various insectlike animals are commonly termed " insects." The animal k Stock Photo

RMRD1FGG–. Elementary entomology. Entomology. PART I. THE STRUCTURE AND GROWTH OF INSECTS CHAPTER II INSECTS AND THEIR NEAR RELATIVES If we are to study insects, it is necessary that we should have a clear conception of just what an insect is and how insects may be distinguished from other animals. Most of us recognize bees, flies, beetles, and butterflies as insects, but other forms of insect life we Fig. I. Earthworm w, mouth ; c, girdle, or clitellum. (After Jordan and Heath) should probably call "worms," and various insectlike animals are commonly termed " insects." The animal k

RF2GXXAGC–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

RFT42108–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. 112 EISEN son, the well-known zoologist, to whom I am indebted for several interesting Oligochteta. Characteristics. —This species is characterized by its spermathecae without diverticles and by the position of its chylus cells in somites X, XI and XII. In most other species the chylus cells are found in somites posterior to clitellum.. Fig. 72. Fridcricia johnso7it. Chylus cells. — The unusual position of these cells has just been mentioned. The cells are long and narrow, with somewhat warty surface. The nucleus is oval, sit Stock Photo

RMRPXP6M–. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. 112 EISEN son, the well-known zoologist, to whom I am indebted for several interesting Oligochteta. Characteristics. —This species is characterized by its spermathecae without diverticles and by the position of its chylus cells in somites X, XI and XII. In most other species the chylus cells are found in somites posterior to clitellum.. Fig. 72. Fridcricia johnso7it. Chylus cells. — The unusual position of these cells has just been mentioned. The cells are long and narrow, with somewhat warty surface. The nucleus is oval, sit

RF2GXXAJ2–Leech on the glass. Bloodsucking animal. subclass of ringworms from the belt-type class. Hirudotherapy.

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