302 COLTJBHID^. 



211. ENHTDRINA. 

 Disteira, part., Fitzing. N. Class. Rept. p. 29 (1826). 

 Polyodontus {non Lacip.), Lesson, in Bilang. Voy. Ind. Or., Sept. 



p. 325 (1834). 

 HydropHs, part., Schleg. Phys. Serp. ii. p. 488 (1837); Dum. Sf 



Bihr. Erp. Qin. vii. p. 1841 (18.54) ; Fischer, Ahh. Naturw. Hamh. 



iii. 1856, p. 41 ; Jan, Elenco sist. Qfid. p. 109 (1863). 

 Enhydrina, Gh-ay, Cat. Sn. p. 47 (1849) ; Gunth. Rept. Brit. Ind. 



p. 381 (1864) ; Boideng. 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 preeocular ; no loreal. Body 

 moderately elongate ; scales imbricate ; ventrals distinct but very 

 Small *. 



Prom the Persian Gulf to New Guinea. 



1. Enhydrina valakadien. 



Russell, Ind. Serp. ii. pi. xi. (1801). 



Hydrus valakadyn, Boie, Isis, 1827, p. 654. 



Disteira russellii, Fitzinger, Isis, 1827, p. 733. 



Polyodontus annulatus. Lesson, in Bilang. Voy. Ind. Or., Rept. 



p. 326, pi. iv. (1834). 

 Hydrophis schistosa (non Daud.), ScTileg. Phys. Serp. ii. p. 600, 



pi. xviii. figs. 1-3 (1837) ; Bum. Sf Bibr. vii. p. 1344 (1854) ; 



Fischer, Ahh. Naturw. Hamb. iii. 1866, p. 48 ; Jan, Icon. Oin. 41, 



pi. ii. fig. 1 (1872). 



bengalensis, Ch-ay, Zool. Misc. p. 62 (1842). 



Bubfasciata, Gray, I. c. 



Hydrus schistosus. Cantor, Cat. Mai. Rept. p. 132 (1847). 

 Enhydrina bengalensis, Qray, Cat. p. 48 (1849) ; GUnth. Rept. Brit. 



Ind. p. 381 (1864) ; Fayrer, Thanatoph. Ind. pi. xviii. (1874) ; 



Murray, Zool. Sind, p. 396 (1884). 

 — — valakadyen, Chray, Cat. p. 48 ; Stoliczka, Joum. As. Soc. Beng. 



xxxix. 1870, p. 213, and Proo. As. Soc. Beng. 1872, p. 91 ; Bouleng. 



Faun. Ind., Rept. p. 406, fig. (1890). 

 schistosa, Stoliczka, I. c. ; Anders. Proc. Zool. Soc. 1871, 



p. 193. 

 Hydrophis fasciatus, Jan, Icon. GSn. 41, pi. iii. fig. 2. 



Eostral deeper than broad ; frontal small, longer than broad, 

 shorter than its distance from the end of the snout or than the 

 parietals ; one prse- 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 

 heeid. 



