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One of the thoracic legs of a crustacean. See Illust. of Crustacea.

ch, the rosefish. -- Red-bellied perch, the long-eared pondfish. -- Perch pest, a small crustacean, parasitic in the mouth of the perch. -- Silver perch, the yellowtail. -- Stone, or Striped, perch, the pope. -- White perch, the Roccus, or Morone, Americanus, a small silvery serranoid market fish of the Atlantic c…

That which is petrified; popularly, a body incrusted with stony matter; an incrustation.

Evident; visible. Phanerite series (Geol.), the uppermost part of the earth's crust, consisting of deposits produced by causes in obvious operation.

A crustacean gill composed of lamellæ.

See Camp, n., 5. [Prov. Eng.] Halliwell. Pie crust, the paste of a pie.

The peel or skin. [Obs.] "Some be covered over with crusts, or hard pills, as the locusts." Holland.

One of the abdominal legs of a crustacean. See Illust. under Crustacea.

Any one of the gills of a crustacean that is attached to the side of the thorax.

One of lateral processes of a somite of a crustacean.

The theory, early advanced in geology, that the successive rocks of the earth''s crust were formed by igneous fusion; -- opposed to the Neptunian theory.

One of branchiæ attached to the bases of the legs in Crustacea.

The stalk-eyed Crustacea, -- an order of Crustacea having the eyes supported on movable stalks. It includes the crabs, lobsters, and prawns. Called also Podophthalmata, and Decapoda.

The eyestalk of a crustacean.

Having numerous facets; -- said of the compound eyes of insects and crustaceans.

That part of a crustacean behind the cephalothorax; -- more commonly called abdomen.

Any one of numerous species of large shrimplike Crustacea having slender legs and long antennæ. They mostly belong to the genera Pandalus, Palæmon, Palæmonetes, and Peneus, and are much used as food. The common English prawn in Palæmon serratus.

The segment next to the flagellum of the antennæ of Crustacea.

The sixth joint of a typical leg of a crustacean; usually, the penultimate joint.

sal portion, or two proximal and more or less consolidated segments, of an appendage of a crustacean.