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

that; granting, allowing, or supposing that; -- introducing a condition or supposition. Tisiphone, that oft hast heard my prayer, Assist, if OEdipus deserve thy care. Pope. If thou be the Son of God, command that these stones be made bread. Matt. iv. 3.

The siphon of Cephalopoda. See Cephalopoda.

connected with natural reservoirs in hills or mountains by passages having the form of a siphon, the water beginning to flow when it has accumulated so as to fill the upper part of the siphon, and ceasing when, by running through it, it has fallen below the orifice of the upper part of the siphon in the reservoir.…

A sheath which surrounds the base of the lasso cells in the Siphonophora.

Any species of Siphonaria, a genus of limpet-shaped Pulmonifera, living between tides, on rocks.

One of the zooids of certain Siphonophora, having somewhat the form, and the essential structure, of the bell of a jellyfish, and acting as a swimming organ.

That portion of the axis which bears the nectocalyces in the Siphonophora.

One of a pair of shelly plates that protect the siphon tubes of certain bivalves, as the Teredo. See Illust. of Teredo.

ing of the pallial line, near the posterior end of certain bivalve shells, to receive the siphon. See Illust. of Bivalve.

e as an ornamental fish. -- Paradise flycatcher (Zoöl.), any flycatcher of the genus Terpsiphone, having the middle tail feathers extremely elongated. The adult male of T. paradisi is white, with the head glossy dark green, and crested. -- Paradise grackle (Zoöl.), a very beautiful bird of New Guinea, of the genus As…

having a sucking mouth, as the lerneans. They are mostly parasites on fishes. Called also Siphonostomata.

A genus of large oceanic Siphonophora which includes the Portuguese man-of-war.

An order of Siphonophora which includes Physalia.

Any siphonophore which has an air sac for a float, as the Physalia.

An order of Siphonophora, furnished with an air sac, or float, and a series of nectocalyces. See Illust. under Nectocalyx.

A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia.

The division of Siphonophora which includes the Physalia and allied genera; -- called also Pneumatophoræ.

ype.] Fresh-water polyp, the hydra. -- Polyp stem (Zoöl.), that portion of the stem of a siphonophore which bears the polypites, or feeding zooids.

One of the feeding zooids, or polyps, of a coral, hydroid, or siphonophore; a hydranth. See Illust. of Campanularian.