ORDER POECILOPODA. 373 



Desmar. Consid. 1. 4. The Oniscus lutosus of Slabber (En- 

 cyclop. Method. Att. d'Hist. Natur. cccxxx. 7, 8), appears, by 

 reason of the fin-like appendages of the tail, to form a subgenus 

 proper. The hinocle a queue en plumet of Geoffroy might be' 

 placed in it. 



In all the others, the upper part of the abdomen is imbri- 

 cated, or this part of the body, is, as it were, enclosed in a 

 sort of case, formed by the hinder feet, which resemble mem- 

 branes, and are folded upwards. 



Among these last there are some whose autennse are never 

 advanced in the manner of small claws, all whose feet are free, 

 and the last of which do not envelope the body in the man- 

 ner of a membranaceous case. They form the following sub- 

 genera, 



Pterygopoda, Latr. Nogaus ? Leach, 



Which have the posterior extremity of the body terminated by 

 two fin-like appendages ; feet pinnated or digitated on the 

 under part of the post-abdomen, or of the second division of 

 the body not covered by the shield, and a distinct beak. 



But a single living species, found upon the shark. See the 

 genus NogauSi Desm. Consid. p. 340. 



Pandarus, Leach, 



Which have two filaments at the posterior extremity of the 

 body ; the feet of the first and of the fifth pair unguiculated, 

 and the others digitate, but whose siphon is not apimrent. 



Pandarus bicolor, Leach, Desmarest, 1. 5 ; Pandarus 

 Boscii, Leach, Encyc. Brit. Suppl. I. xx. See, for the other 

 species, Desm. ihid. p. 339. 



DiNEMOURA, Lat., 



Having likewise two long filaments to the anus, bat whose 

 siphon is apparent. Their two anterior feet arc unguiculated. 



