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Marginella :: Marginella (n.) A genus of small, polished, marine univalve shells, native of all warm seas..

Myaria :: Myaria (n. pl.) A division of bivalve mollusks of which the common clam (Mya) is the type.

Holostraca :: Holostraca (n. pl.) A division of phyllopod Crustacea, including those that are entirely covered by a bivalve shell..

Spindle :: Spindle (n.) Any marine univalve shell of the genus Rostellaria; -- called also spindle stromb.

Spoutless :: Spoutfish (n.) 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..

Trochus :: Trochus (n.) Any one of numerous species of marine univalve shells belonging to Trochus and many allied genera of the family Trochidae. Some of the species are called also topshells.

Melon :: Melon (n.) A large, ornamental, marine, univalve shell of the genus Melo..

Pandora :: Pandora (n.) A genus of marine bivalves, in which one valve is flat, the other convex..

Sucker :: Sucker (n.) The embolus, or bucket, of a pump; also, the valve of a pump basket..

Ostracean :: Ostracean (n.) Any one of a family of bivalves, of which the oyster is the type..

Anomia :: Anomia (n.) A genus of bivalve shells, allied to the oyster, so called from their unequal valves, of which the lower is perforated for attachment..

Peritreme :: Peritreme (n.) The edge of the aperture of a univalve shell.

Cage :: Cage (n.) A skeleton frame to limit the motion of a loose piece, as a ball valve..

Bivalve :: Bivalve (n.) A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyster. See Mollusca..

Brachiopoda :: Brachiopoda (n.) A class of Molluscoidea having a symmetrical bivalve shell, often attached by a fleshy peduncle..

Bivalve :: Bivalve (n.) A pericarp in which the seed case opens or splits into two parts or valves.

Cephalata :: Cephalata (n. pl.) A large division of Mollusca, including all except the bivalves; -- so called because the head is distinctly developed. See Illustration in Appendix..

Stopcock :: Stopcock (n.) A bib, faucet, or short pipe, fitted with a turning stopper or plug for permitting or restraining the flow of a liquid or gas; a cock or valve for checking or regulating the flow of water, gas, etc., through or from a pipe, etc..

Nucula :: Nucula (n.) A genus of small marine bivalve shells, having a pearly interior..

Valvule :: Valvule (n.) A little valve; a valvelet.

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