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Capromys, Plagiodon, and allied genera. -- Hedgehog shell (Zoöl.), any spinose, marine, univalve shell of the genus Murex. -- Hedgehog thistle (Bot.), a plant of the Cactus family, globular in form, and covered with spines (Echinocactus). -- Sea hedgehog. See Diodon.

Spiral; curved, like the spire of a univalve shell.

ra. Called also soldier crab. The hermit crabs usually occupy the dead shells of various univalve mollusks. See Illust. of Commensal. -- Hermit thrush (Zoöl.), an American thrush (Turdus Pallasii), with retiring habits, but having a sweet song. -- Hermit warbler (Zoöl.), a California wood warbler (Dendroica occidenta…

Having an entire aperture; -- said of many univalve shells.

The external margin of the aperture of a shell. See Univalve.

One of the edges of the aperture of a univalve shell. Lip bit, a pod auger. See Auger. -- Lip comfort, comfort that is given with words only. -- Lip comforter, one who comforts with words only. -- Lip labor, unfelt or insincere speech; hypocrisy. Bale. -- Lip reading, the catching of the words or meaning of one spe…

The last day of Carnival; Shrove Tuesday; -- in some cities a great day of carnival and merrymaking.

A genus of small, polished, marine univalve shells, native of all warm seas.

ose larva constructs an earthen cocoon under the soil. -- Mason shell (Zoöl.), a marine univalve shell of the genus Phorus; -- so called because it cements other shells and pebbles upon its own shell; a carrier shell. -- Mason wasp (Zoöl.), any wasp that constructs its nest, or brood cells, of hardened mud. The femal…

One of a group of univalve shells, having a large aperture or mouth.

A large, ornamental, marine, univalve shell of the genus Melo. Melon beetle (Zoöl.), a small leaf beetle (Diabrotiea vittata), which damages the leaves of melon vines. -- Melon cactus, Melon thistle. (a) (Bot.) A genus of cactaceous plants (Melocactus) having a fleshy and usually globose stem with the surface divided…

ight angle. See Miter, 2. -- Miter shell (Zoöl.), any one of numerous species of marine univalve shells of the genus Mitra. -- Miter square (Carp.), a bevel with an immovable arm at an angle of 45º, for striking lines on stuff to be mitered; also, a square with an arm adjustable to any angle. -- Miter wheels, a pair…

hey are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or multivalve.

Having the equivalence or replacing power of an atom of hydrogen; univalent; as, the methyl radical is monatomic.

Capable of being neutralized by a univalent base or basic radical; having but one acid hydrogen atom to be replaced; -- said of acids; as, acetic, nitric, and hydrochloric acids are monobasic.

Having a valence of one; univalent. See Univalent.

The tip, or earliest part, of a univalve or bivalve shell.

n 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 one source of it is said to be…

ve 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 some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Pearls which are round, or nearly round, and of fine luster, are highl…

The edge of the aperture of a univalve shell.