HYDEUS. 397 



490. Enhydris hardwickii. 



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

 Hydropliis pelamidoides, Schley. Phys. Serp. ii, p. 512, pi. xviii, tigs. 



16 & 17 ; Dum. i^- Bibr. Erp. Gen. vii, p. 134:5 ; Jan, Icon. Ophid. 



41, pi. iii, fig. 1. 

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

 Hydropbis (Pelamis) pelamidoides, Fischer, Abh. Naticrw. Hamb. 



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

 Hydropliis problematiciis, Jan, Rev. et Mag. Zool. 1859, p. 150. 

 Hydropliis hardwickii, G'dnth. Rept, B. I. p. 380, pi. xxv, fig. AV. 

 Hydrophis loreata, Gilnth op. cit. p. 380 ; Boetty. Zool. Anz. 1888, 



p. 396. 

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

 Hydrophis abhreviatus atid H. brevis, Ja7t, Icon. Ophid. 40, pi. iv, 



fig. 2, & pi. V, fig. 2. 



Parietals large ; one prfc- 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. 

 Venti'als 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. 



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

 of New Guinea. 



Genus HYDRUS, 

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



Maxillary much longer than transpalatine ; poison-fangs short, 

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

 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 veutrals. 



Only one species. 



491. Hydrus platurus. 



Rmsell, Ind. Serp. i, pi. xli. 



AngTiis platura, Lin7i. Syst. Nat. i, p. 391. 



Hydrus bicolor, Schncid. Hist. Amph. i, p. 242 ; Cantor, J. A. S. B. 



x\a, 1847, p. 1056. 

 Pelamis bicolor, Hand. Rcpt. vii, p. 366, pi. Ixxxix ; Dwn. ^- Bil/r. 



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



Thanatoph. pi. xvii ; Murray, Zool. Sind, p. 3i>7. 

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

 Hydropbis bicolor, Fischer, Abh. Naturtv. Hamb. iii, 1856, p. 61 ; 



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

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



