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

Pneumatocyst :: Pneumatocyst (n.) A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia..

Siphonobranchiate :: Siphonobranchiate (n.) One of the Siphonobranchiata.

Nectostem :: Nectostem (n.) That portion of the axis which bears the nectocalyces in the Siphonophora.

Siphonophora :: Siphonophora (n. pl.) An order of pelagic Hydrozoa including species which form complex free-swimming communities composed of numerous zooids of various kinds, some of which act as floats or as swimming organs, others as feeding or nutritive zooids, and others as reproductive zooids. See Illust. under Physallia, and Porpita..

Porpita :: Porpita (n.) A genus of bright-colored Siphonophora found floating in the warmer parts of the ocean. The individuals are round and disk-shaped, with a large zooid in the center of the under side, surrounded by smaller nutritive and reproductive zooids, and by slender dactylozooids near the margin. The disk contains a central float, or pneumatocyst..

Physaliae :: Physaliae (n. pl.) An order of Siphonophora which includes Physalia.

Involucrum :: Involucrum (n.) A sheath which surrounds the base of the lasso cells in the Siphonophora.

Siphoniferous :: Siphoniferous (a.) Siphon-bearing, as the shell of the nautilus and other cephalopods..

Asiphonate :: Asiphonate (n.) An asiphonate mollusk.

Siphonia :: Siphonia (pl. ) of Siphoniu.

Phragmosiphon :: Phragmosiphon (n.) The siphon of a phragmocone.

Siphon :: Siphon (n.) One of the tubes or folds of the mantle border of a bivalve or gastropod mollusk by which water is conducted into the gill cavity. See Illust. under Mya, and Lamellibranchiata..

Gynophore :: Gynophore (n.) One of the branches bearing the female gonophores, in certain Siphonophora..

Siphoid :: Siphoid (n.) A siphon bottle. See under Siphon, n..

Hydrozoa :: Hydrozoa (n. pl.) The Acalephae; one of the classes of coelenterates, including the Hydroidea, Discophora, and Siphonophora..

Limpet :: Limpet (n.) Any species of Siphonaria, a genus of limpet-shaped Pulmonifera, living between tides, on rocks..

Taster :: Taster (n.) One of a peculiar kind of zooids situated on the polyp-stem of certain Siphonophora. They somewhat resemble the feeding zooids, but are destitute of mouths. See Siphonophora..

Siphonoglyphe :: Siphonoglyphe (n.) A gonidium.

Asiphonida :: Asiphonida (n. pl.) A group of bivalve mollusks destitute of siphons, as the oyster; the asiphonate mollusks..

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