. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 4S0 CRUSTACEA. there are five pairs of long spiny legs, of which the last is much the largest and ends in a broad swimming-fin. Some of the anterior appendages may be armed with a chela. The resemblance of the true Euryj)terid(B (in the general shape of their body) to the iS'corpionulce is very striking, while the genus Hemiaspis presents ftffinities to the Poecilojwda. The most important forms are: Eitri/pterits j)i/gmceus SaFt., Devonian strata, Ptenjgotus anglicus Ag., four feet long, from the up
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 4S0 CRUSTACEA. there are five pairs of long spiny legs, of which the last is much the largest and ends in a broad swimming-fin. Some of the anterior appendages may be armed with a chela. The resemblance of the true Euryj)terid(B (in the general shape of their body) to the iS'corpionulce is very striking, while the genus Hemiaspis presents ftffinities to the Poecilojwda. The most important forms are: Eitri/pterits j)i/gmceus SaFt., Devonian strata, Ptenjgotus anglicus Ag., four feet long, from the upper Silurian (fig. 373).. Fig. yjZ.—Euryptenit remipes nfter Nieszkowski. a, Dorsal view ; b, ventral view; O, eyes; St. caudal spine ; S, hypostome. Order 2.—Xipiiosura.* Gigantostraca whose hodAj is divided into three parts, which are onovahly articida'ted together ; a large shield-shaped cejyhalo-thorax, an abdomen with Jive jxdrs of lamellar feet and a long movable caudal sjnne. The large body of these Crustacea is covered with a strong chiti- * C. Gegenbaur, " Anatomische Untcrsuchung cines Limulus, mit bcsonderer Beriicksichtigung der Gewebe," Ahhnndl. der natnrfovsch. GcM-llschaft zu Halle, IV., 18.^58. Packard. "The Development of Limulus Polyphemus," Soc. of Nat. 1870. A. M. Edwards. " Kcchcrchcs sur I'anatomie dcs Limules," Ann. ae. nai. V S^r. Tom. 1872-1873. [E. E. Lankester, "Limulus an Arachnid,'' Quart. Journ. Mic. Soe., vol. xxi.]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
