ENHTDEINA. 193 



213. Eiihydris hardwickii. 



Lajjeniis hanhvickii, Gray, 111. Ltd. Zool. ii, pi. Ixxxvii, fig. 2 



(1834). 

 Hi/drus pdamidoides, Cantor, Jouru. Asiat. Soc. Bengal, xvi, 



p. 1054 (1847). 

 HydropJiis Juirdwickii, Glintli. Kept. Brit. liuT. p. S80, pi. xxv, 



tig. W (1864). 

 Hydrophis lorcata, Giinth. 1. c. 

 I^nhydris hardwickii. Bouleng. Faun. Brit. lud., Bept. p. o97 



(1890) ; id. Cat. Sn. iii, p. 301 (1896). 



"Very similar to the preceding, but rostral as deep as broad or 

 slightly bi-oader than deep and parietals large and entire ; a 

 loreal soiuetiiues present. 25 to 33 scales round anterior part of 

 body, 34 to 37 round middle. Ventrals 130-200. The dark 

 bands often form complete rings round the body. 



Total length 750 miJlim. ; tail 80. 



Bay of Bengal to jS^ew Guinea. Eecorded from the Straits of 

 Malacca, Singapore, and the Pataui Coast. 



Genus ENHYDRINA. 

 Gray, Cat. Sn. p. 47 (1849). 



Maxillary scarcely longer than the ectoptei-ygoid, not extending 

 forwards quite so far as the palatine, with two large poison-fangs 

 followed by 4 small teeth. Nostrils superior; head -shields large, 

 nasals in contact with each other ; a praeocular, no lorenJ. 

 Symphysial shield narro\^'. partly concealed in a deep groove in 

 the chin. Body moderately elongate ; scales imbricate \ ventrals 

 distinct but very small. 



A single species. 



214. Enhydrina valakadien. 



Hijdrus I'cdukadyn, Boie, Isis, 1827, p. 5o4. 



Hydrus schistosus, Cantor, Journ. Asiat. Soc. Bengal, xvi, p. 1053 



(1847). 

 EnJvjdrina bengalensis, Gray, Cat. Sn. p. 48 (1849) ; Giinth. Kept. 



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



(1874). 

 Enliydnna valakadyen, Grav, 1. c; Bouleng. Faun. Brit. Ind. p. 40(i, 



tig. (1890) ; id. Cat. Sn. i'ii, p. 302 (1896). 



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

 shorter than its distance from the end of the snout; one prae- and 

 one or two postoculars ; 7 or 8 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 anterior 

 part of body, 50 to 70 round middle ; scales feebly imbricate, 

 with a small tubercle or short keel, which is stronger in males. 



o 



