724 DR. J. E. GRAY ON THE SKULLS AND [Nov. 4, 



1. Elephantopus. 

 Forehead of skull flattened. Nose-hole broader than long, broadest 

 and truncated above and narrowed below, and separated from the 

 alveolar surface by a high thick intermaxillary bone. Nasal grooves 

 of the palate moderately deep and much contracted behind, with a 

 distinct central ridge for the whole of their length. 



Elephantopus planiceps. 



Testudo planiceps, Gray, Cat. Sh. Rept. t. xxxiv. (skull). 



2. Megalochelys, Agassiz. 

 Forehead of skull convex, swollen ; nose-hole much higher than 

 broad, narrowed and rounded above, separated from the alveolar 

 surface by a thin intermaxillary bone. Nasal grooves of the palate 

 very deeply concave, expanded in the middle and slightly contracted 

 behind. 



Megalochelys indica. 



Testudo indica, Gray, Cat. Sh. Rept. t. xv. f. 1 (skull). 



3. Asterochelys, Gray. 

 Forehead of skull flattened. Nose slightly bent down in front ; 

 nose-hole square, rather broader than wide, truncated behind, sepa- 

 rated from the alveolar surface by a high intermaxillary bone. Nasal 

 grooves of the palate deeply concave in front, rather dilated behind, 

 with three ridges in the centre of the front. 



Asterochelys radiata. (Plate LX. fig. 2, alveolar processes 

 of jaws.) 



Testudo radiata, Hand-list, p. 4. 



Tribe III. Chelonoidina. 

 The lower jaw with a ridge on each side of the linear alveolar 

 concavity, the front ridge continued and ending in a sharp-edged 

 prominence, with a very slight central longitudinal ridge extending 

 from the front to the back edge of the jaw ; the hinder marginal 

 ridge ending just as it reaches the front edge of the jaw, leaving 

 a broad slightly keeled space in front of the inner edge of the jaw. 

 The alveolar process of the upper jaw with two ridges, with a 

 large broad concavity in front between their front ends, extending 

 behind into a triangular flat disk between the inner nostrils, which 

 have a deep groove behind each of them. 



1. Chelonoides, Fitzinger, Ag. (No character.) 

 Forehead flattish. Nose-bole broader than high, with a central 

 prominence on the upper and lower edge, and a moderately high 

 intermaxillary bone. 



Chelonoides tabulata. (Plate LX. fig. 3, alveolar processes 

 of jaws.) 



Testudo tabulata, Gray, Cat. Sh. Rept. t. xxxv. f. 2, a, b, c (not 

 good). 



