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A disk which surrounds the mouth and bears the tentacles of the Bryozoa. See Phylactolemata.

A genus of acalephs, having a bell-shaped body with eight groups of short tentacles around the margin. It attaches itself by a sucker at the base of the pedicel.

A kind of gonophore produced by hydroids of the genus Gonothyræa. It has tentacles, and otherwise resembles a free medusa, but remains attached by a pedicel.

topod annelids, having a well-formed head, with two pairs of eyes, antennæ, four pairs of tentacles, and a protrusile pharynx, armed with a pair of hooked jaws.

Having tentacles without vibratile cilia. Carpenter.

ean actinian (Anemonia, or Anthea, sulcata); -- so called because it does not retract its tentacles.

A remarkable genus of marine worms having tentacles around the mouth. It is usually classed with the gephyreans. Its larva (Actinotrocha) undergoes a peculiar metamorphosis.

An order of fresh-water Bryozoa in which the tentacles are arranged on a horseshoe-shaped lophophore, and the mouth is covered by an epistome. Called also Lophopoda, and hippocrepians.

A genus of ctenophores having an ovate body and two long plumose tentacles.

, arranged along an axis like a feather; feathery; plumelike; as, a plumose leaf; plumose tentacles.

An old name for those Anthozoa which, like the actinias, have numerous simple tentacles.

Like a polyp; having the nature of a polyp, but lacking the tentacles or other parts.

A genus of marine Bryozoa in which the tubular cells have a centralchitinous axis and the tentacles are borne on a bilobed lophophore. It is the type of the order Pterobranchia, or Podostomata

One of the two tentacle-like organs on the back of the head or neck of a nudibranch or tectibranch mollusk. They are usually retractile, and often transversely furrowed or plicate, and are regarded as olfactory organs. Called also dorsal tentacles. See Illust. under Pygobranchia, and Opisthobranchia.…

A suborder of Medusæ which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix.

rtaining to the Saccata, a suborder of ctenophores having two pouches into which the long tentacles can be retracted.

ends, a pointed or spadelike foot for burrowing, and many long, slender, prehensile oral tentacles. It includes Dentalium, or the tooth shells, and other similar shells. Called also Prosopocephala, and Solenoconcha.

i) having a bright orange convex body covered with finely granulated scales. Its expanded tentacles are bright red.

A special organ of the nautilus, due to a modification of the posterior tentacles.

An extensive division of marine Annelida, including those that are without oral tentacles or cirri, and have the gills, when present, mostly arranged along the sides of the body. They generally live in burrows or tubes.