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Divided into segments or joints; articulated.

e of the larger divisions of Crustacea, so called because the thorax and abdomen are both segmented; Tetradecapoda. It includes the Amphipoda and Isopoda.

ities in vertebrates, or one of the similar segments in plants, such as the segments of a segmented leaf. Syd. Soc. Lex.

renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus. [Written also Leptocardii.]

opoda, PteropodaScaphopoda, and Lamellibranchiata, or Conchifera. These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered a…

m) and many similar kinds. They have long, slender, many-jointed legs; usually a rounded, segmented abdomen; and chelate jaws. They breathe by tracheæ. Called also Phalangides, Phalangidea, Phalangiida, and Opilionea.

A division of arachnids having large, powerful fangs and a segmented abdomen; -- called also Solpugidea, and Solpugides.

have the mandibles converted into poison fangs, or falcers. The abdomen is large and not segmented, with two or three pairs of spinnerets near the end, by means of which they spin threads of silk to form cocoons, or nests, to protect their eggs and young. Many species spin also complex webs to entrap the insects upon…

One of the theoretic transverse divisions of any segmented animal.