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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 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.

A group of Crustacea in which the eyes are without stalks; the Arthrostraca. [Written also Edriophthalmata.]

The inner or principal branch of the oral appendages of Crustacea. See Maxilla.

A chitinous structure above the nervous cord in the thorax of certain Crustacea.

The portion of each apodeme developed from the interepimeral membrane in certain crustaceans.

The internal or principal branch of the locomotive appendages of Crustacea. See Maxilliped.

The part of each apodeme derived from the intersternal membrane in Crustacea and insects.

A plate which supports the labrum in certain Crustacea.

One of the subclasses of Crustacea, including a large number of species, many of them minute. The group embraces several orders; as the Phyllopoda, Ostracoda, Copepoda, and Pectostraca. See Copepoda, Phyllopoda, and Cladocera.

An isopod crustacean, parasitic on shrimps.

In crustaceans: The part of the side of a somite external to the basal joint of each appendage. See Illust. under Crustacea.

The outer branch of the legs in certain Crustacea. See Maxilliped.

The region between the antennæ and the mouth, in Crustacea.

tozoön. Among them are the lice, ticks, many acari, the lerneans, or fish lice, and other crustaceans.

The external branch of the appendages of Crustacea.