246 MAJOR F. WALL, 1.M.S., C.M.Z.S. 
ENHYDRIS. 
Key to the species of Enhydris. 
(A) Parietals broken up; suture from nostril to second labial ..  curtus. 
(B) Parietals entire ; suture from nostril to first labial .. hardwicku. 
ENHYDRIS CURTUS (Shaw). 
Hydrus curtus, Shaw, Zool., 1802, iii, p. 562. 
Lapemis curtus, Gray in Zool. Misc., 1842, p. 60, and Cat., 1849, p-. 44- 
Hydrophis curta, Grinther, Rept. Brit. Ind., 1864, p. 379. 
+ »,  Stoliczka in Proc. As. Soc. Bengal, 1872, p. 91 
5s ,,  Fayrer, Thanatoph. Ind., 1874, pl. xxiv. 
i propinquus, Jan., Icon. Gén., 1872, 41, pl. 1, fig. 2. 
Enhydris curtus, Boulgr. in Blanford, Fauna Brit. Ind. Rept. and Batrach., 1890, 
p. 396, and Cat., ii, 1896, p. 300. 
i ,,  Sclater, List Snakes Ind. Mus., 1891, p. 62. 
- Ps Wall in Jour. Bomb. Nat. Hist. Soc., xvi, p. 310, and in Spol. 
Zeylan., August 1907, p. 172. 
Fig. 61.—Enhydris curtus (x 13). 
I have examined in detail 21 examples of this species, which is very common 
around the Coasts of India. On the Malabar Coast it was the commonest sea snake 
after Enhydrina valakadyn. 
It is a very easy species to recognise. It shares with EF. hardwickii alone the 
peculiar enlargement o° the lowest three or four costal rows. The completely broken 
up condition of the parietals is only seen in the genus Acalyptus among the Hydro- 
phiinee with this one exception. 
Description.—Rostral,—touches four shields ; the portion visible above is one- 
third or less than one-third the length of the internasal suture. Prefrontals,— 
touch the second supralabial (the third also in one, no supralabial in one example). 
Frontal,—entire. Parietals,—broken up; very frequently into three, sometimes 
more parts, which, however, taken together preserve the contour of these shields as 
seen in other species of the family.' Nasals,—touch the first and second supra- 
! One exception No, 11531 in Indian Museum where they are entire. 
