UROPELTIS. 



253 



Synopsis of the Genera. 



A. Eye in the- ocular shield ; fourth labial 



in contact with the parietal. 



a. No mental groove. 



'. No supraocular shield. 



a". Tail obliquely truncated, ending 



in a large, rugose, circular or 



oval, flat shield UROPELTIS, p. 253. 



b" . Tail ending in a large convex 



rugose shield, which is neither 



truncated nor spinose at end . . RHIXOPHIS, p. 254. 

 c". Terminal caudal scute small, 



square at the end or bicuspid, 



the points side by side SILYBURA, p. 257. 



d". Tail compressed, the terminal 



scute with two superposed, single [p. 270. 



or bifid points PSEUDOPLECTRURUS, 



I/. \ supraocular shield PLECTRURUS, p. 270. 



b. A median groove along chin MELANOPHIDIUM, p. 272. 



B. Eye distinct from surrounding shields ; 



a temporal shield separates fourth labial 



from parietal PLATYPLECTRTJRUS, p. 273. 



Genus UROPELTIS, 



Cuvier, Ixegne An., 2nd ed., ii, p. 76 (part.), 1829. 

 Eye in the ocular shield. No mental groove. No supraocular : 



Fig. 80. Uropeltis grandis. 

 Upper surface of tail and upper and side views of head. 



no temporal. Tail obliquely truncated, ending in a large, rugose, 

 circular or oval, flat shield. 

 Distribution. Ceylon. 



