154 XESTT7DINIDJ5. 



Plastron notched behind ; profile of cara- 

 pace nearly horizontal in front 25. vicina, p. 1 70. 



2. Shields smooth and plastron truncate posteriorly in the 

 adult. 



a. Width of plastral l)ridp;c^ twice or 

 twice and one fourth in the 

 length of the carapace 20. microphyes, p. ] 70. 



h. "Width of ])lastral hridj^o twice and a half to three times 

 in the length of the carai)ace ; median alveolar ridge of 

 upper jaw much nearer the inner than the outer edge 

 (as seen from helow). 



Carapace thin hut well ossified 27. epldpphim, p. 171. 



Carapace very thin, leathery 28. abinc/donii, p. 171. 



C. Nuchal absent ; gular single ; plastron short. 



1. Carapace thin, thickened towards the margin. 



Upper profile of carapace straight, not de- 

 clivous in front 29. indlca, p. 172. 



Carapace dojiressed, "with the u])])cr profile 



undulated, slightly declivous in front . . 30. truerrata, p. 172. 



Carapace high, with the upper profile con- 

 vex, declivous in front 31. incpta, p. 172. 



2. Carapace extremely thin, not de- 



clivous in front in the male .... 32. vosmaeri, p. 173. 



TI. Carapace brown or olive, uniform or spotted with black, or 

 black and yellow ; gular shields distinct ; alveolar ridge of 

 upper jaw rather short and feeble. 



A. Suture between the anal shields, if present, extremely short. 



Nuchal shield usually present; suture be- 

 tween the pectoral shields as long as, or 

 longer than, that between the humerals . 33. elonrjata, p. 173. 



Nuchal absent ; suture between the pec- 

 torals half as long as that between the 

 humerals 34. forstenii, p. 174. 



B. Suture between the anal shields nearly as long as, or longer 



than, that between the femorals. 



1. Hand with five claws. 



a. Fifth vertebral shield not broader tlian third : supra- 

 caudal undivided. 



No enlarged tubercle on the hind side of v 

 the thigh ; imbricate tubercles on the 

 front of the fore limb in four or five lon- 

 gitudinal series 35. marginata, p. 174. 



