mOPELTIS. 



253 



Synopsis of the Genera. 



A. Eye ill the ocular shield ; fourth labial 



in contact with the parietal. 

 (i. No mental groove. 



a. 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 PSEUDOPLKCTRURUS, 



b'. A supraocular shield PLECTRURUS, p. 270. 



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



B. Eye distinct from surrounding shields; 



a temporal shield separates fourth labial 



from parietal PLATYPLBCTBUBU8, p. 273. 



Genus UROPELTIS, 



Cuvier, Itegne An., 2nd ed., ii, p. 76 (part.), 1820. 

 Eye in Ihe ocular shield. No mental groove. 



No supraocular 



Fig. 80. Uropeltis graiidis. 

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



110 temporal. Tail obliquely truncated, ending in a large, rugose, 

 circular or oval, flat shield. 

 Distribution. Ceylon. 



