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The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.

cowry (Zoöl.), a large, handsome cowry (Cypræa aurantia), highly valued by collectors of shells on account of its rarity. -- Orange grass (Bot.), an inconspicuous annual American plant (Hypericum Sarothra), having minute, deep yellow flowers. -- Orange oil (Chem.), an oily, terpenelike substance obtained from orange…

A genus of minute living Foraminifera having a globular shell.

A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidæ.

An extinct genus of Paleozoic Cephalopoda, having a long, straight, conical shell. The interior is divided into numerous chambers by transverse septa.

An orthoceras; also, any fossil shell allied to Orthoceras.

The internal bone, or shell, of a cuttlefish.

A division of bivalve mollusks including the oysters and allied shells.

An order of Entomostraca possessing hard bivalve shells. They are of small size, and swim freely about. [Written also Ostracoda.]

Of or pertaining to an oyster, or to a shell; shelly. The crustaceous or ostreaceous body. Cudworth.

st two forming a couplet. It was used by Byron in "Don Juan," by Keats in "Isabella," by Shelley in "The Witch of Atlas," etc.

in England for hunting otters. -- Otter sheep. See Ancon sheep, under Ancon. -- Otter shell (Zoöl.), very large bivalve mollusk (Schizothærus Nuttallii) found on the northwest coast of America. It is excellent food, and is extensively used by the Indians. -- Sea otter. (Zoöl.) See in the Vocabulary.…

l species of wading birds of the genus Hæmatopus, which frequent seashores and feed upon shellfish. The European species (H. ostralegus), the common American species (H. palliatus), and the California, or black, oyster catcher (H. Bachmani) are the best known. -- Oyster crab (Zoöl.) a small crab (Pinnotheres ostreum)…

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

r 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. S…

e 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.

ored 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.

tus). -- Partridge berry. (Bot.) (a) The scarlet berry of a trailing american plant (Mitchella repens) of the order Rubiaceæ, having roundish evergreen leaves, and white fragrant flowers sometimes tinged with purple, growing in pairs with the ovaries united, and producing the berries which remain over winter; also, th…