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Armadillo :: Armadillo (n.) A genus of small isopod Crustacea that can roll themselves into a ball.

Swimming :: Swimmeret (n.) One of a series of flat, fringed, and usually bilobed, appendages, of which several pairs occur on the abdominal somites of many crustaceans. They are used as fins in swimming..

Abdomen :: Abdomen (n.) The posterior section of the body, behind the thorax, in insects, crustaceans, and other Arthropoda..

Barnacle :: Barnacle (n.) Any cirriped crustacean adhering to rocks, floating timber, ships, etc., esp. (a) the sessile species (genus Balanus and allies), and (b) the stalked or goose barnacles (genus Lepas and allies). See Cirripedia, and Goose barnacle..

Sedentary :: Sedentary (a.) Remaining in one place, especially when firmly attached to some object; as, the oyster is a sedentary mollusk; the barnacles are sedentary crustaceans..

Ommateum :: Ommateum (n.) A compound eye, as of insects and crustaceans..

Aptera :: Aptera (n. pl.) Insects without wings, constituting the seventh Linnaen order of insects, an artificial group, which included Crustacea, spiders, centipeds, and even worms. These animals are now placed in several distinct classes and orders..

Slater :: Slater (n.) Any terrestrial isopod crustacean of the genus Porcellio and allied genera; a sow bug.

Brachyura :: Brachyura (n. pl.) A group of decapod Crustacea, including the common crabs, characterized by a small and short abdomen, which is bent up beneath the large cephalo-thorax. [Also spelt Brachyoura.] See Crab, and Illustration in Appendix..

Hypostoma :: Hypostoma (n.) The lower lip of trilobites, crustaceans, etc..

Remiped :: Remiped (a.) Having feet or legs that are used as oars; -- said of certain crustaceans and insects.

Procerite :: Procerite (n.) The segment next to the flagellum of the antennae of Crustacea.

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

Apus :: Apus (n.) A genus of fresh-water phyllopod crustaceans. See Phyllopod.

Post-abdomen :: Post-abdomen (n.) That part of a crustacean behind the cephalothorax; -- more commonly called abdomen.

Merostomata :: Merostomata (n. pl.) A class of Arthropoda, allied to the Crustacea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs of the last group. See Limulus..

Endosternite :: Endosternite (n.) The part of each apodeme derived from the intersternal membrane in Crustacea and insects.

Podobranch :: Podobranch (n.) One of the branchiae attached to the bases of the legs in Crustacea.

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

Metanauplius :: Metanauplius (n.) A larval crustacean in a stage following the nauplius, and having about seven pairs of appendages..

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