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A young oyster or other bivalve mollusk, both before and after it first becomes adherent, or such young, collectively.

ket inclosing a number of spermatozoa. They are present in many annelids, brachiopods, mollusks, and crustaceans. In cephalopods the structure of the capsule is very complex.

A marine animal that spouts water; -- applied especially to certain bivalve mollusks, like the long clams (Mya), which spout, or squirt out, water when retiring into their holes.

Any marine univalve mollusk of the genus Strombus and allied genera. See Conch, and Strombus.

Next to the median (on either side); as, the submedian teeth of mollusks.

he branchiæ; -- applied especially to the upper division of the gill cavity of bivalve mollusks.

Situated above the foot of a mollusk; as, the suprapedal gland.

An extensive division of gastropod mollusks in which the odontophore is long and narrow, and usually bears seven rows of teeth. It includes a large number of families both marine and fresh- water.

A tectibranchiate mollusk.

A genus of marine bivalve mollusks having thin, delicate, and often handsomely colored shells.

ntacle sheath (Zoöl.), a sheathlike structure around the base of the tentacles of many mollusks.

Boring; perforating; -- applied to molluskas which form holes in rocks, wood, etc.

A genus of long, slender, wormlike bivalve mollusks which bore into submerged wood, such as the piles of wharves, bottoms of ships, etc.; -- called also shipworm. See Shipworm. See Illust. in App.

Invertebrate animals covered with shells, especially mollusks; shellfish.

The science of testaceous mollusks; conchology. [R.]

A genus of a large naked mollusks having a very large, broad, fringed cephalic disk, and branched dorsal gills. Some of the species become a foot long and are brilliantly colored.

The lingual ribbon, or odontophore, of a mollusk.

uth of various invertebrates and used in feeding or procuring food; as, the teeth of a mollusk or a starfish. In spite of the teeth, in defiance of opposition; in opposition to every effort. -- In the teeth, directly; in direct opposition; in front. "Nor strive with all the tempest in my teeth." Pope. -- To cast in t…

A division of marine gastropod mollusks in which the radula are converted into poison fangs. The cone shells (Conus), Pleurotoma, and Terebra, are examples. See Illust. of Cone, n., 4, Pleurotoma, and Terebra.

Having the gills situated upon the neck; -- said of certain mollusks.