. Seaside studies in natural history. Marine animals. 132 MARINE ANIMALS OF MASSACHUSETTS BAY. Fig. 176 the young Sea-urchin has so far encroached upon the Pluteus that it forms the essential part of the body, the arms and mg. rods appearing as mere appendages. Pig. 177 shows the same animal when we looked down upon it in its natural attitude ; the Sea-urchin is carried downward, and the arms stretch in every di- rection around it. In Pig. 178 the Pluteus is already in process of absorption; in Pig., 179 it ha,s wholly disappeared; in Pigs. fig. 176. Adult larva of Toxopaeustes, / brachi
. Seaside studies in natural history. Marine animals. 132 MARINE ANIMALS OF MASSACHUSETTS BAY. Fig. 176 the young Sea-urchin has so far encroached upon the Pluteus that it forms the essential part of the body, the arms and mg. rods appearing as mere appendages. Pig. 177 shows the same animal when we looked down upon it in its natural attitude ; the Sea-urchin is carried downward, and the arms stretch in every di- rection around it. In Pig. 178 the Pluteus is already in process of absorption; in Pig., 179 it ha,s wholly disappeared; in Pigs. fig. 176. Adult larva of Toxopaeustes, / brachilar 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 Agassiz, Elizabeth Cabot Cary, 1822-1907; Agassiz, Alexander, 1835-1910, joint author. Boston, J. R. Osgood and Company
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