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Shrimp :: Shrimp (v.) Any one of numerous species of macruran Crustacea belonging to Crangon and various allied genera, having a slender body and long legs. Many of them are used as food. The larger kinds are called also prawns. See Illust. of Decapoda..

Copepoda :: Copepoda (n. pl.) An order of Entomostraca, including many minute Crustacea, both fresh-water and marine..

Screw :: Screw (n.) An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand..

Exuviation :: Exuviation (n.) The rejecting or casting off of some part, more particularly, the outer cuticular layer, as the shells of crustaceans, skins of snakes, etc.; molting; ecdysis..

Anomuran :: Anomuran (a.) Irregular in the character of the tail or abdomen; as, the anomural crustaceans..

Crustaceologist :: Crustaceologist (n.) One versed in crustaceology; a crustalogist.

Tube :: Tube (n.) A more or less cylindrical, and often spiral, case secreted or constructed by many annelids, crustaceans, insects, and other animals, for protection or concealment. See Illust. of Tubeworm..

Cancer :: Cancer (n.) A genus of decapod Crustacea, including some of the most common shore crabs of Europe and North America, as the rock crab, Jonah crab, etc. See Crab..

Incrustate :: Incrustate (v. t.) To incrust.

Macrura :: Macrura (n. pl.) A subdivision of decapod Crustacea, having the abdomen largely developed. It includes the lobster, prawn, shrimp, and many similar forms. Cf. Decapoda..

Endophragma :: Endophragma (n.) A chitinous structure above the nervous cord in the thorax of certain Crustacea.

Scale :: Scale (n.) An incrustation deposit on the inside of a vessel in which water is heated, as a steam boiler..

Crustacean :: Crustacean (a.) Of or pertaining to the Crustacea; crustaceous.

Podophthalmia :: Podophthalmia (n. pl.) 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..

Hepato-pancreas :: Hepato-pancreas (n.) A digestive gland in Crustacea, Mollusca, etc., usually called the liver, but different from the liver of vertebrates..

Peraeopod :: Peraeopod (n.) One of the thoracic legs of a crustacean. See Illust. of Crustacea.

Propodite :: Propodite (n.) The sixth joint of a typical leg of a crustacean; usually, the penultimate joint..

Lignification :: Lignification (n.) A change in the character of a cell wall, by which it becomes harder. It is supposed to be due to an incrustation of lignin..

Crustacea :: Crustacea (n. pl.) One of the classes of the arthropods, including lobsters and crabs; -- so called from the crustlike shell with which they are covered..

Thoracostraca :: Thoracostraca (a.) An extensive division of Crustacea, having a dorsal shield or carapec/ //niting all, or nearly all, of the thoracic somites to the head. It includes the crabs, lobsters, shrimps, and similar species..

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