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Belonging to the Coelentra. -- n.

The entire body of a coelenterate.

The mouth or anterior opening of a coelenterate animal.

The anterior surface or oral area of coelenterate animals, as of sea anemones.

the functions, both of digestive and circulatory organs; as, the gastrovascular cavity of coelenterates.

The Acalephæ; one of the classes of coelenterates, including the Hydroidea, Discophora, and Siphonophora.

a peculiar kind of defensive and offensive stinging cells, found in great numbers in all coelenterates, and in a few animals of other groups. They are most highly developed in the tentacles of jellyfishes, hydroids, and Actiniæ. Each of these cells is filled with, fluid, and contains a long, slender, often barbed, hol…

A thin gelatinous tissue separating the ectoderm and endoderm in certain coelenterates. -- Mes`o*gloeal, a.

The entire covering of an invertebrate animal, as echinoderm or coelenterate; the integument.

The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.

and heterogeneous group of animals, formerly adopted by many zoölogists. It included the coelenterates, echinoderms, sponges, Bryozoa, Protozoa, etc.