]^46 TESTTTDryiD^. 



Synopsis of the Species. 

 I. Carapace depressed, of equal depth throughout. 



A. Fore limb with four claws ; inguinal shield very small. 



Posterior margin of carapace not serrated ; no 



large femoral tubercle 1. areolatus,i). 147. 



Posterior margin serrated ; a very large conical 



tubercle on the hinder side of the thigh . . 2. femoralis,^.lA7 . 



Fig. 42. 



Shell of Homopus areolatus. 



h. Fore limb with five claws ; inguinal 

 shield large, in contact with the fe- 

 moral ; posterior margin of carapace 

 serrated ; a .'cry large conical tubercle 

 on the hinder side of the thigh \\. sitjnafus, p. 148. 



11. Carapace very convex, gibbose behind, 



