A MONOGRAPH OF THE SEA-SNAKES (HYDROPHTIIN A). 247 
labials ; a suture runs from the nostril to the second supralabial (in three examples to 
the first). Preoculars,—one. Postoculars,—one or two. Temporals,— 
two or three small shields. Supralabials,—seven usually, sometimes eight ; the 
third and fourth usually touch the eye (sometimes the fifth also, rarely the fourth 
only). Infralabials.—the fourth is the largest of the series, and in contact with 
three or four scales behind. Marginals,—a more or less complete row after the 
second infralabial. Sublinguals,—poorly developed, often so small, they hardly 
deserve the name. ‘The anterior and posterior fellows are widely separated. Cos- 
tals,—anteriorly 29 to 36, midbody 30 to 45, posteriorly 31 to 42 ; juxtaposed every- 
where; the lowest three or four rows distinctly enlarged, and in many males the 
tubercles are remarkably spinose. Ventrals,—151 to 219, illdeveloped except 
anteriorly. 4 
Colour.-—Olivaceous with dark, ill-defined dorsal transverse bars, as wide or wider 
than the interspaces. 
Hatbitat.—Coasts from the Persian Gulf to Borneo. 
The post-maxillary teeth are grooved. 
ENHYDRIS HARDWICKII (Gray). 
Lapemis hardwickii, Gray, Ill. Ind. Zool., 1834, ii, pl. Ixxxvii, f. 2, and Cat., 1849, 
Pp. 44. 
loreatus, Gray in Ann. Mag. Nat. Hist., 1843, x1, p. 46. 
ty loreata, Giinther, Rept. Brit. Ind., 1864, p. 380. 
Hydrophis pelamidoides, Jan, Icon. Gén., 1872, 41, pl. iii, fig. I. 
abbreviatus, Jan, loc. cit., 40, pl. iv, fig. 2, and v, fig. 2. 
y; fayreriana, Anderson in Journ. As. Soc. Bengal, 1871, p. 19. 
Enhydris hardwickii, Giinther, Rept. Brit. Ind., 1864, p. 380, pl. xxv, fig. W ; 
Boulgr. in Blanford, Fauna Ind. Rept. and Batrach., 
1890, p. 397, and Cat., iii, 1896, p. 30T. 
Sclater, List Snakes, Ind. Mus., 1891, p. 62. 
Wall in Proc. Zool. Soc. Lond., 1903, p. 96. 
” 
” 
Fig. 62.—Enhydris (Hydrophis) hardwickit. After Giinther, Rept. Brit. Ind., 1864, pl. xxv, fig. 4: 
I have examined at least 22 examples. It is an easy snake to recognise. One 
feature requires special mention as being almost peculiar to itself, 7.e., suture runs from 
the nostril to the first supralabial. I have seen but two exceptions, and it is afeature 
I have only seen in a few aberrant examples of FE. curtus and Distira ornata among all 
