Entomostomata (entomostomata)

pl. [NL., lariida. Entomostraca (en-to-mos'tra-kä), n. pl. [NL. Daphnia (see Daphnia ); Branchiopod a, as the brine-shrimp Trilobites, all of which are extinct; Merostomata, of which Eurypterus and Pterygotus are the best-known examples among fo ils, the king-crab being the only living example. To these some add the Epizoa, or parasitic crustaceans. No zoological definition can be framed to include all these groups, each of which is now usually regarded as a distinct order. The Entomostraca appear to have been first named by O. F. Müller in 1785, and have also been called Gnatho (Artemia salina) the glacier-flea ( Podura pod a, as by H. Woodward. (b) In various systems, one of two main divisions of Crustacea proper (the other being Mala cost raca ). It is divided into Cirriped i a (including Rhizocephala ), Copepod a (including Siphonostoma), Ostracod a, Branchiopod a covering both Cladocera and Phyllopod are stricted, defined, and retained by Huxley, those Crustacea which have not more than three max ill i form gnathites and completely specialized jaws, the abdominal segments (counting as such those which lie behind the genital aperture) devoid of appendages, if there be any abdomen, and the embryo almost always leaving the egg as a nauplius-form. Thus defined, the En Branchiopod a; 4, Ostracod a; 5, Pectostraca. 3, to most raca are divided into: 1, Copepod a; 2, Epizoa; entomostracan (en-tō-mos'tra-kan), a. and n. I. a. Pertaining to or having the characters of the Entomostraca. II. n. One of the Entomostraca . When we come to the coal-measures, the Mala cost raca disappear; but we then find the gigantic entomostracan called the king-crab. Owen , Anat.