. Echinoderms of Connecticut. Echinodermata. No. ip.] ECHINODERMS OF CONNECTICUT. 23 Both anipullse and tube-feet have highly muscular walls, and both are filled with fluid from the water-vascular system;. When, in locomotion, the ampulla of any particular tube-foot is con- tracted, the fluid contained therein is forced into the tube-foot itself, extending this organ until it becomes a long, finger-like process. On coming in contact with any external object the disk at the end of the tube-foot may be pressed tightly against it. If now the muscles of the tube-foot contract, the water which. Fig
![. Echinoderms of Connecticut. Echinodermata. No. ip.] ECHINODERMS OF CONNECTICUT. 23 Both anipullse and tube-feet have highly muscular walls, and both are filled with fluid from the water-vascular system;. When, in locomotion, the ampulla of any particular tube-foot is con- tracted, the fluid contained therein is forced into the tube-foot itself, extending this organ until it becomes a long, finger-like process. On coming in contact with any external object the disk at the end of the tube-foot may be pressed tightly against it. If now the muscles of the tube-foot contract, the water which. Fig Stock Photo](https://c8.alamy.com/comp/RDNH55/echinoderms-of-connecticut-echinodermata-no-ip-echinoderms-of-connecticut-23-both-anipullse-and-tube-feet-have-highly-muscular-walls-and-both-are-filled-with-fluid-from-the-water-vascular-system-when-in-locomotion-the-ampulla-of-any-particular-tube-foot-is-con-tracted-the-fluid-contained-therein-is-forced-into-the-tube-foot-itself-extending-this-organ-until-it-becomes-a-long-finger-like-process-on-coming-in-contact-with-any-external-object-the-disk-at-the-end-of-the-tube-foot-may-be-pressed-tightly-against-it-if-now-the-muscles-of-the-tube-foot-contract-the-water-which-fig-RDNH55.jpg)
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. Echinoderms of Connecticut. Echinodermata. No. ip.] ECHINODERMS OF CONNECTICUT. 23 Both anipullse and tube-feet have highly muscular walls, and both are filled with fluid from the water-vascular system;. When, in locomotion, the ampulla of any particular tube-foot is con- tracted, the fluid contained therein is forced into the tube-foot itself, extending this organ until it becomes a long, finger-like process. On coming in contact with any external object the disk at the end of the tube-foot may be pressed tightly against it. If now the muscles of the tube-foot contract, the water which. Fig. I. Transverse section of a decalcified ray of a young starfish, showing the relations of the internal organs. The two ampullM (amp) open by wide canals into the tube-feet (0, the water supply of which is provided by the radial canal (re). The openings into the ampullae from the radial canal are furnished with delicate valves, as indicated, which pre- vent the back flow of the water when the ampuUse are contracted and the tube-feet extended. Beneath the radial canal are the two radial perihsemal vessels (rv), separated by a vertical septum, and beneath these is the radial nerve-cord (n), which extends from the circum-oral nerve to the tip of the ray. Sections of the spines (s), branchiae (b), and pedicellariae (p) are indicated. The pyloric caeca (h) are attached by mesenteries to the dorsal wall of the ray. The spaces between the organs constitute the coelom (c), and are in life filled with a fluid somewhat resembling the blood, and like it containing floating corpuscles.. 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.. Coe, Wesley Roswell, 1869-. Hartford, Printed for the State Geological and Natural History Survey