HTBEUS. 397 



490. Enhydris hardwickii. 



Lapemis hardwickii, Gray, III. Ind. Zool. ii, pi. Ixxxvii, fig. 2. 

 Hydrophis pelamidoides, Schley. Phys. Serp. ii, p. 512, pi. xviii, figs. 



16 & 17 ; Dum. $ Bibr. Erp. Gen. vii, p. 1345 ; Jan, Icon. Ophid. 



41, pi. iii, fig. 1. 



Lapemis loreatus, Gray, A. M. N. H. xi, 1843, p. 46. 

 Hydrophis (Pelamis) pelamidoides, Fischer, Abh. Naturw. Hamb. 



iii, 1856, p. 64, pi. iii. 



Ilydrophis problematicus, Jan, Rev. et Mag. Zool. 1859, p. 150. 

 Hydrophis hardwickii. Giinth. Rept. B. I. p. 380, pi. xxv, fig. W. 

 Ilydrophis loreata, Giinth op. tiit. p. 380 ; Boettg. Zool. Am. 1888, 



p. 396. 



Hydrophis fayreriana, Anders. J. A. S. B. xl, 1871, pt. 2, p. 19. 

 Hydrophis abbreviates and H. brevis, Jan, Icon. Ophid. 40, pi. iv, 



fig. 2, & pi. v, fig. 2. 



Parietals large ; one prae- and one to three postoculars ; a loreal 

 sometimes present ; two or three superposed anterior temporals ; 

 seven upper labials, fourth, or third and fourth, entering the eye ; 

 chin-shields very small and separated by scales, or quite indistinct. 

 25 to 33 scales round the anterior part of the body, 34 to 37 round 

 the middle of the body, with tubercles as in the preceding species. 

 Ventrals usually very indistinct, 135-200. Coloration as in the 

 preceding, but the dark bands often forming complete rings round 

 the body. 



Total length 2| feet. 



Hob. From the Bay of Bengal to the Chinese Sea and the coast 

 of New Guinea. 



Genus HYDRUS, 

 Schneider, Hist. Amph. i, p. 233 (part.), 1799. 



Maxillary much longer than transpalatine ; poison-fangs short, 

 followed, after a short interval, by seven or eight solid teetli. 

 Snout long ; nostrils superior ; nasal shields in contact with each 

 other; head-shields large. Body short. All the scales hexagonal 

 or squarish, and juxtaposed. No distinct ventrals. 



Only one species. 



491. Hydrus platurus. 



Russell, Ind. Serp. i, pi. xli. 



Angiiis platura, Linn. Syst. Nat. i, p. 391. 



Hydras tricolor, Schneid. Hist. Amph. i, p. 242 ; Cantor, J. A. S. B. 



xvi, 1847, p. 1056. 

 Pelamis bicolor, Daud. Rept. vii, p. 366, pi. Ixxxix ; Dum. $ Bibr. 



Erp. Gen. vii, p. 1335; Giinth. Rept. B. I. p. 382; Fayrcr, 



Thanatoph. pi. xvii ; Murray, Zool. Sind, p. 397. 

 Pelamis ornata, Gray, Cat. Sn. p. 43. 

 Hydrophis bicolor, Fischer, Abh. Naturw. Hamb. iii, 1856, p. 01 ; 



Jan, Icon. Ophid. 40, pis. ii & iii. 

 Pelamis platurus, Stoliczka, P. A. S. B. 1872, p. 92. 



