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Siphonet :: Siphonet (n.) One of the two dorsal tubular organs on the hinder part of the abdomen of aphids. They give exit to the honeydew. See Illust. under Aphis.

Velella :: Velella (n.) Any species of oceanic Siphonophora belonging to the genus Velella.

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..

Siphonia :: Siphonia (pl. ) of Siphoniu.

Siphonium :: Siphonium (n.) A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible..

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

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

Siphonophore :: Siphonophore (n.) One of the Siphonophora.

Siphonobranchiata :: Siphonobranchiata (n. pl.) A tribe of gastropods having the mantle border, on one or both sides, prolonged in the form of a spout through which water enters the gill cavity. The shell itself is not always siphonostomatous in this group..

Siphon :: Siphon (n.) A tubular organ connected both with the esophagus and the intestine of certain sea urchins and annelids.

Tube-shell :: Tube-shell (n.) Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell..

Pallet :: Pallet (n.) One of a pair of shelly plates that protect the siphon tubes of certain bivalves, as the Teredo. See Illust. of Teredo..

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..

Infundibulum :: Infundibulum (n.) The siphon of Cephalopoda. See Cephalopoda.

Physophorae :: Physophorae (n. pl.) An order of Siphonophora, furnished with an air sac, or float, and a series of nectocalyces. See Illust. under Nectocalyx..

Siphonopoda :: Siphonopoda (n. pl.) A division of Scaphopoda including those in which the foot terminates in a circular disk.

Siphonostomatous :: Siphonostomatous (a.) Having the front edge of the aperture of the shell prolonged in the shape of a channel for the protection of the siphon; -- said of certain gastropods.

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..

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

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

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