240 BRITISH ENTOMOSTKACA. 



Legion III— PJ^CILOPODA.* 



P^ciLOPODA, LatreUIe, Cuv. Regue Au., iv. 



— Desmarest, Cous. gen. Crust. 



— Leach, Diet. Sc. Nat., xiv, 52-i. 



— Roux, Crust, de la Meiliterr. 



— Baird, Traus. Berw. Nat. Club, ii. 



Thecata, LatreUIe, Hist. Nat. Crust., iv ; Gen. Crust, et Insect., ii. 



— Leach, Edin. Encyclop., art. Crustaccology. 

 Bkanchiopodes parasites, Lamarck, An. s. Vert., edit. 2d, v. 200. 

 Cbustaces suceuks {pars), M. Edwards, Hist. Nat. Crust., iii. 

 Parasita, Burmeister, Beit, zur Naturg. der Rankenfussen, p. 54. 

 CoRMosTOMATA, DaHu, Proc. Am. Acad. Ai-ts and Sc, 1849, p. 53. 



Character. — Moutli not possessed of organs fitted for 

 mastication, having instead an apparatus adapted for 

 sucking. Peet, partly formed for walking or prehension, 

 and part branchiferous, and fitted for swimming. Body, 

 in the greater number, inclosed almost totally within a 

 buckler, consisting generally of one piece, occasionally of 

 two. Parasitical upon fishes, &c. 



Order SIPHONOSTOMA.f 



SiPHONOSTOJiA, Laireille, Cuv. Hegne Anim., iv. 



— M. Edwards, Hist. Nat. Crust., iii. 



— Roux, Crust, de la Mediterr. 



— Baird, Trans. Berw, Nat. Club, ii. 

 Pneumonura, LatreUIe, Hist. Nat. Crust., iv ; Gen. Crust, et Ins., ii. 



— Leach, Edin. Encyclop., art. Crustaccology. 

 Caligacea, Dana, Proc. Am. Acad. Arts and Sc, 1S49, p. 53. 



Character. — Mouth furnished with a siphon, which 

 possesses styliform mandibles. Thorax composed of 

 several distinct rings, and having three or four pairs of 

 feet. Foot-jaws well developed. 



M. Edwards divides the order Siphonostoma into two 

 families, the Peltocephales, and the Pachycephales. 



The Peltocephales are distinguished by their having 



* From TToiKiXog, various ; and ttovq, foot, 

 ■f From (71(1)0)1', a tiil)e ; and (jTo^ia, a mouth. 



