. Seaside studies in natural history. Marine animals. CAUDINA. 97 tions is much like that of leeches, and on this account these SynaptaB were long supposed to be a transition type between the Radiates and worms. The body grows to a great length, often half a yard and more, but constantly drops large portions from its posterior part, by means of its own contractions, or breaks it- self up by the expulsion of the intestines, which are very readily cast out. The tentacles are hollow, consisting of a central rib with branches from either side. In the Synaptse, as in all the Holothurians, the madre
. Seaside studies in natural history. Marine animals. CAUDINA. 97 tions is much like that of leeches, and on this account these SynaptaB were long supposed to be a transition type between the Radiates and worms. The body grows to a great length, often half a yard and more, but constantly drops large portions from its posterior part, by means of its own contractions, or breaks it- self up by the expulsion of the intestines, which are very readily cast out. The tentacles are hollow, consisting of a central rib with branches from either side. In the Synaptse, as in all the Holothurians, the madreporic body is placed near the mouth, between two of the ambulacra, and opposite the fifth or odd one. The tiibe, connecting with the central tube aroimd the mouth, by means of which it commimicates with the ambulacral tubes, is very short. Oaudina. (Caudina arenata Stimps.) Several other Holothurians are frequently met with on our shores. Among them is the Oaudina arenata (Fig. 126), a small Holothurian, yellowish in color, and thick in texture, ng. by no means so pretty as thfe white transparent Synapta j the tentacles are short, resembling a crown of cloves aroimd the mouth. It lives in the sand, and may be found in great numbers on the sandy beaches after a storm. Vig. 126. Caudlna arenata; natural BiM. 13. 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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