296 CAPTAIN F. WALL ON 



20. Enhydris Hardwickii (Gray). 



Enhydris hardwickii, Blgr. Cat. Snakes Brit. Mus., Vol. Ill, p. 311. 



Sclater, List Snakes Ind. Mus. 1891, p. 62, Nos. 8270, 11504, 

 11528, 11529, 11530, 11532, II533, H535> II536, II537, 

 11538, 11539. 

 ,, ,, Wall in Proc. Zool. Soc. Lond. 1903, p. 96. 



Rostral, — portion seen above less than half the suture between the nasals. Prefron- 

 tals touch the 2nd supralabial. Frontal, — parietal sutures largest but not twice the 

 prefrontals. Temporals, — two, three or four anterior ; the uppermost large, followed by 

 two small scales bordering the parietal. Marginals, — two behind the 2nd infralabial ; 

 the 4th infralabial touches the labial border. Infralabials, — 4 or 5. The 4th largest, and 

 in contact with three or four scales behind. Sublinguals, — badly developed, in fact cannot 

 be said to be present. Costals, — juxtaposed everywhere ; the last three vental rows very 

 distinctly enlarged, and some specimens (males ?) have the tubercles developed into re- 

 markable spines on these enlarged rows. 



It is a very easy snake to recognise. I believe it is the only sea snake in which the 

 suture from the nostril normally runs to the 1st supralabial. In all other snakes where 

 there is a suture at all it runs to the 2nd supralabial. I have examined upwards of 20 

 specimens, and this feature has been noticeable in all. On the other hand I have noticed 

 the same condition in two aberrant specimens out of 20 in E. curtus, and in three 

 examples out of 15 of Distira ornata. It differs normally from E. curtus in that the 

 parietals are not broken up, and in the fact that there are no ventral shields (another 

 feature peculiar to this snake). In E. curtus ventrals are not developed except anteriorly 

 where, however, they are very distinct. 



21. Enhydrina valakadyen (Boie). 



Enhydrina valakadyen, Blgr. Cat. Snakes B/it. Mus., Vol. Ill, p. 302. 

 ,, Sclater, List. Snakes Ind. Mus., p. 64. 



Wall and Evans in Journ. Bomb. Nat. Hist. Soc. Vol. XIII, 



pp. 347 and 616. 

 Wall in Journ. Bomb. Nat. Hist. Soc. Vol. XVI, p. 31 1-. 

 There are many examples, including Nos. 8220, 8689, 11512 to 11520, 13092, 

 13247, 13662, 13676, (a and b) 14477, I449 1 * I4°94 and 14695. 



Rostral, —portion seen above less than half the suture between the nasals. Pre- 

 frontals touch the 2nd supralabial normally (rarely not). Frontal, — parietal sutures 



