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ic region of invertebrate animals, being either an organ of sense, prehension, or motion. Tentacle sheath (Zoöl.), a sheathlike structure around the base of the tentacles of many mollusks.

Having tentacles.

Sustenance. [Obs.] Dr. H. More.

Destitute of tentacles, as certain mollusks.

A large division of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not.

A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles.

s, blood vessels, and water tubes. These zones usually bear rows of locomotive suckers or tentacles, which protrude from regular pores. In star fishes they occupy the grooves along the under side of the rays.

A group of Pulmonifera having the eyes at the base of the tentacles, including the common pond snails.

h there may be two or more kinds in a single colony. The zooecia usually have a wreath of tentacles around the mouth, and a well developed stomach and intestinal canal; but these parts are lacking in the other zooids (Avicularia, Ooecia, etc.).

Lucernaria is the type. The body is cup-shaped with eight marginal lobes bearing clavate tentacles. An aboral sucker serves for attachment. The interior is divided into four large compartments. See Lucernarida.

A suborder of Bryozoa, usually having a circle of bristles below the tentacles.

A kind of zooid of Siphonophora which has an elongated or even vermiform body, with one tentacle, but no mouth. See Siphonophora.

ion of Cephalopoda which includes the squids, cuttlefishes, and others having ten arms or tentacles; -- called also Decapoda. [Written also Decacera.] See Dibranchiata.

An order of Bryozoa in which the anus lies outside the circle of tentacles.

A group of Bryozoa in which the anus is within the circle of tentacles. See Pedicellina.

One of a group of stalked rotifers, having ciliated tentacles around the lobed disk.

isk, or foot, on the ventral side of the body. The head usually bears one or two pairs of tentacles. See Mollusca. [Written also Gasteropoda.]

One of an order of fresh-water Bryozoa, in which the tentacles are on a lophophore, shaped like a horseshoe. See Phylactolæma.

undibulate Bryozoa (Zoöl.),a group of marine Bryozoa having a circular arrangement of the tentacles upon the disk.

oelenterates, 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, hollow thread coiled up within it. When the cell contracts the thread is quickly ejected, bein…