302 COLUBRID. 
211. ENHYDRINA. 
Disteira, , Fitsing. N. Class. Rept. p. 29 (1826). 
Polyodontus (non Lacép.), Lesson, in Bélang. Voy. Ind. Or., Rept. 
Pp. , ; 
Hydrophis, part., Schleg. Phys. Serp. ii. p. 488 (1837); Dum. & 
i xte. Bro. Gén. Wil. p. 13at (sss user “ADA. Naboo, Ham 
iii, 1856, p. 41; Jan, Elenco sist. Ofid. p. 109 (1863). ; 
Enhydrina, Gray, Cat. Sn. p. 47 ( 1849); Giinth. _ Brit. Ind. 
p. 881 (1864); Bouleng. Faun, Ind., Rept. p. 405 (1890), 
Maxillary scarcely longer than the ectopterygoid, not extending 
forwards quite as far as the palatine, with two large poison-fangs 
followed by 4 solid teeth. Nostrils superior; head-shields large, 
nasals in contact with each other; a preocular; no loreal, Body 
moderately elongate; scales imbricate; ventrals distinct but very 
small *, 
From the Persian Gulf to New Guinea. 
1. Enhydrina valakadien. 
Russell, Ind. Serp. ii. pl. xi. (1801). 
Hydrus valakadyn, Bote, Isis, 1827, p. 554, 
Disteira russellii, Fitzinger, Isis, 1827, p. 733. 
Polyodontus annulatus, Lesson, in Bélang. Voy. Ind. Or., Rept. 
p. 325, pl. iv. (1834). 
Hydrophis schistosa (non Daud.), Schleg. Phys. Serp. ii. p. 500, 
l. xviii. figs. 1-3 (1837); Dum. §& Bibr. vii. p. 1344 (i854): 
iesker, Abh. Naturw. Hamb. iii. 1856, p. 48 ; Jan, Icon. Gén. 41, 
pl. ii. fig. 1 (1872). 
— bengalensis, Gray, Zool. Misc. p. 62 (1842). 
—— subfasciata, Gray, l. ¢. 
Hydrus schistosus, Cantor, Cat. Mal. Rept. p. 182 (1847). 
Enhydrina bengalensis, Gray, Cat. p. 48 (1849) ; Giinth. Rept. Brit. 
Ind. p. 381 (1864); Fayrer, Thanatoph. Ind. pl. xviii. (1874) ; 
Murray, Zool. Sind, p. 396 (1884). 
— valakadyen, Gray, Cat. p. 48; Stoliczka, Journ, As. Soc, Beng. 
xxxix. 1870, p. 213, and Proc. As. Soc. Beng. 1872, p.91 ; Bouleng. 
Faun. Ind., Rept, . 406, fig. (1890). 
schistosa, Stoliczka, 1. ¢.; Anders. Proc, Zool, Soc. 1871, 
. 193. 
Hyitcophis fasciatus, Jan, Icon. Gén, 41, pl. iii. fig. 2. 
Rostral deeper than broad; frontal small, longer than broad, 
shorter than its distance from the end of the snout or than the 
parietals ; one pre- and one or two postoculars; seven or eight 
upper labials, fourth or third and fourth entering the eye; usually 
a single anterior temporal; chin-shields small or indistinct. 40 to 
60 scales round the neck, 50 to 70 round the body; scales feebly 
imbricate, with a small tubercle or short keel, which is stronger in 
the males. Ventrals very slightly enlarged, 230-314. Young 
olive or grey above, with black transverse bands, broadest in the 
middle and tapering to a point on the sides; in the adult these 
- - 
* They begin to be distinguishable at a considerable distance behind the 
