Class V. ONISCUS. 37 



GENUS III. ONISCUS. 



Jaw truncated, denticulated. 



Lip bifid. 



Feelers unequal, hinder the longest. 



Antenna setaceous. 



Body oval. 



Feet fourteen. 



Gm. Lin, 3010. ' Idotea Psora. Bosc. Hist, des 1. Psora. 



Crust, ii. 80. ^"^"'fy- 



[O. WITH the abdomen smooth underneath ; 

 tail semi-ovalj sharp pointed. Tab. xix.Jig. 1. 



Gtn. Lin. 30U.? Pallas spic. Zool. ix. 68. t. 4.2. Linearis. 



. ! vc 1 « * 1 r, - --^ Dentate- 



f-^'-*^^' tailed. 



[O. with a sub-semicylindrical body ; head slen- 

 derer ; exterior antemice less than the length 

 of half the body, the intermediate very small ; 

 color brownish, with a paler stripe down the 

 back. Tab. xix, Jig.^. ' • 



