Search the Dictionary

Between the sternal; -- said of certain membranes or parts of insects and crustaceans.

The third joint or the antennæ of the Crustacea.

The third joint of the typical appendages of Crustacea.

An order of sessile-eyed Crustacea, usually having seven pairs of legs, which are all similar in structure.

An organ in insects and crustaceans covering the upper part of the mouth, and serving as an upper lip. See Illust. of Hymenoptera.

A division of amphipod Crustacea, in which the abdomen is small or rudimentary and the legs are often reduced to five pairs. The whale louse, or Cyamus, and Caprella are examples.

An order of Crustacea, including Nebalia and allied forms.

A suborder of copepod Crustacea, including a large number of remarkable forms, mostly parasitic on fishes. The young, however, are active and swim freely. See Illustration in Appendix.

One of a family (Lernæidæ) of parasitic Crustacea found attached to fishes and other marine animals. Some species penetrate the skin and flesh with the elongated head, and feed on the viscera. See Illust. in Appendix.

Any large macrurous crustacean used as food, esp. those of the genus Homarus; as the American lobster (H. Americanus), and the European lobster (H. vulgaris). The Norwegian lobster (Nephrops Norvegicus) is similar in form. All these have a pair of large unequal claws. The spiny lobsters of more southern waters, belongi…

Any small crustacean parasitic on fishes. See Branchiura, and Ichthvophthira.

A genus of free-swimming macruran Crustacea, having a slender body and long appendages.

A subdivision of decapod Crustacea, having the abdomen largely developed. It includes the lobster, prawn, shrimp, and many similar forms. Cf. Decapoda.

A subclass of Crustacea, including Arthrostraca and Thoracostraca, or all those higher than the Entomostraca.

That branch of zoölogical science which relates to the crustaceans; -- called also carcinology.

The anterior pair of mouth organs of insects, crustaceaus, and related animals, whether adapted for biting or not. See Illust. of Diptera.

upials; furnished with a pouch for the young, as the marsupials, and also some fishes and Crustacea.

marsupials carry their young; also, a pouch for similar use in other animals, as certain Crustacea.

One of the mouth appendages of Crustacea, situated next behind the maxillæ. Crabs have three pairs, but many of the lower Crustacea have but one pair of them. Called also jawfoot, and foot jaw.

The fourth joint of a typical appendage of Crustacea.