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The pincherlike claw of Crustacea and Arachnida.

A genus of marine amphipod crustacea, which bore into and sometimes destroy timber.

amorphous horny substance forming the harder part of the outer integument of insects, crustacea, and various other invertebrates; entomolin.

An order of Crustacea including the barnacles. When adult, they have a calcareous shell composed of several pieces. From the opening of the shell the animal throws out a group of curved legs, looking like a delicate curl, whence the name of the group. See Anatifa.

One of a pair of organs used by the male for grasping the female among many of the Crustacea.

A subdivision of the cretaceous formation of western North America, especially developed in Colorado and the upper Missouri region.

An order of Entomastraca, including many minute Crustacea, both freshwater and marine.

The first joint of the leg of an insect or crustacean.

One of the brachyuran Crustacea. They are mostly marine, and usually have a broad, short body, covered with a strong shell or carapace. The abdomen is small and curled up beneath the body.

Any crustacean of the family Astacidæ, resembling the lobster, but smaller, and found in fresh waters. Crawfishes are esteemed very delicate food both in Europe and America. The North American species are numerous and mostly belong to the genus Cambarus. The blind crawfish of the Mamoth Cave is Cambarus pellucidus. The…

Chalky; cretaceous. [Obs.] Ash.

Crustaceology.

An order of marine Crustacea, mostly of small size.

A genus of small, bivalve, freshwater Crustacea, belonging to the Ostracoda; also, a member of this genus.

The claw or terminal joint of a leg of an insect or crustacean.

Of or pertaining to a finger or toe, or to the claw of an insect crustacean.

A subdivision at the base of the cretaceous formation in Western North America; -- so named from the region where the strata were first studied.

A crustacean with ten feet or legs, as a crab; one of the Decapoda. Also used adjectively.

The order of Crustacea which includes the shrimps, lobsters, crabs, etc.

The division of Cetacea which comprises the dolphins, porpoises, and related forms.