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

or impression, which marks the attachment of the mantle on the inner surface of a bivalve shell. See Illust. of Bivalve. Pallial chamber (Zoöl.), the cavity inclosed by the mantle. -- Pallial sinus (Zoöl.), an inward bending of the pallial line, near the posterior end of certain bivalve shells, to receive the siphon.…

te mollusks, belonging to Paludina, Melantho, and allied genera. They have an operculated shell which is usually green, often with brown bands. See Illust. of Pond snail, under Pond.

bored manner; to gasp out. There is a cavern where my spirit Was panted forth in anguish. Shelley.

A large spiral East Indian marine shell (Turbinella rapha); -- so called because used by native priests to hold the oil for anointing.

The triangular middle part of each segment of the shell of a barnacle.

(Cassia Chamæcrista), common in sandy fields in the Eastern United States. -- Partridge shell (Zoöl.), a large marine univalve shell (Dolium perdix), having colors variegated like those of the partridge. -- Partridge wood (a) A variegated wood, much esteemed for cabinetwork. It is obtained from tropical America, and…

A genus of marine gastropods, including many species of limpets. The shell has the form of a flattened cone. The common European limpet (Patella vulgata) is largely used for food.

Having few spirals, or whorls; as, a paucispiral operculum or shell.

A covering; a canopy; figuratively, the sky. The pavilion of heaven is bare. Shelley.

A kind of aboriginal shell money, or wampum, of the Atlantic coast of the United States; -- originally applied only to polished white cylindrical beads.

A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around s…

Containing pearls; abounding with, or yielding, pearls; as, pearly shells. Milton.

s; also, its fruit, a smooth, oblong nut, an inch or an inch and a half long, with a thin shell and well- flavored meat. [Written also pacane.]

A sort of stem by which certain shells and barnacles are attached to other objects. See Illust. of Barnacle.

A chicken just breaking the shell; a young bird.

Of or pertaining to the sea; marine; pelagic; as, pelagian shells.

The internal shell of a squid.

pper Silurian. Pentamerus limestone (Geol.), a Silurian limestone composed largely of the shells of Pentamerus.

A division of Foraminifera, including those having perforated shells.