227 



slight notch ; a deepish notch between Ihe front and the orbit, and a 

 sinus betvveen the outer orbitai angle and the first lobe of the side. 

 Hab. ? 



Family HiPPiDiE. 

 CosMONOTUS, Adams and White. 



CosMONOTUs Grayii, Adams and White, List of Crustacea, p. 129. 



Carapace oval (about an inch in length and half an inch -vvide), 

 very much compressed laterally, especially in front, with a distinct 

 prominent keel extending do\vn the middle line, very strongly marked 

 in front, but fainter posteriorly ; the surface covered with numerous 

 minute depressed punctures. 



Front with t\vo very small spines on each side of a deep angular 

 notch, in \vhich are placed the eyes. 



Chelffi trigonal, the inferior part plane, the exterior convex, -vvith 

 transverse, interrupted, engraved or depressed lines, the upper angle 

 covered vvith long thick hairs ; the inner surface concave. Carpus 



