118 



Head short and thick; body rather stout; 

 shields of the snout irregular. Two post- 

 oculars ; scales with a strong white keel. Ven- 

 trals bicarinate, not larger than the adjoining 

 scales. S. anomala. 



Head short and thick; body stout. Oae 

 postocular. Ventral shields nearly twice as 

 broad as the scales of the adjoining series. „ curta. 



Head short and thick; body stout. One 

 postocular. No distinct ventral shields. Trunk 

 with from 41 to 43 blackish cross-bands, not 

 exceeding downwards to the belly. „ hardwicku. 



Head short and thick; body stout. One 

 postocular. No distinct ventral shields. Trunk 

 encircled by frojn 29 to 34 (37) black rings. „ loreata. 



The following species have lately been added to the 

 genus : — 



H. fayreriana. 

 H. tuberculata. 

 H. crassicollis. 

 H. stewartii. 

 H. nigra. 



ENHYDRINA, Gray. 



Differs from HydropMs in having a deep notch in the 

 lower jaw. 



E. BENGALENSis or VALAKADYEN, Cfray. Plate X, fig. 6. 



The rostral is lobulated and fits into the deep mental 

 notch. Scales 48-50. 



Common on the Burman coast. 



