146 TESTU DINID&. 
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- ........ Sah mann Lasancolatussp.da 7. 
Posterior margin serrated ; a very large conical 
tubercle on the hinder side of the thigh .. 2. femoralis,p.147. 
Fig. 42. 
fen tN an 
LRN eee AVEO 
Shell of Homopus areolatus. 
B. Fore limb with five claws; inguinal 
shield large, in contact with the fe- 
moral; posterior margin of carapace 
serrated ; a very large conical tubercle 
on the hinder side of the thigh ..... . 3, signatus, p. 148. 
II. Carapace very convex, gibbose behind, 
