2b MAJOR F. WALL, I.M.S., C.M.Z.S. 
is met with in individuals of many other hydrophids, viz., Enhydrina valakadyn, 
Enhydris hardwicku, Distira ornata, D. viperina, D. nigrocincta, and others. Praeocu- 
lar,—one. Postoculars,—three. Temporals,—many, small, and scale-like. 
Supralabials,—seven, the anterior five entire and well-developed, the rest small ; the 
third and fourth touch the eye. Infralabials,—four, the fourth divided, the last in 
contact with two scales behind. Marginals,—one or more after the third infra- 
labial. Sublinguals,—two well-developed pairs, the fellows of each in contact. 
Costals,—anterior 19 to 23, midbody 24 to 29, posterior 23 to 29; subimbricate. 
Ventrals,—156 to 209 about as broad, or narrower than the last costal row. 
Colour.—Yellowish-grey with a series of dorsal black cross-bars, tapering 
subcostally, and a series of ventral bars alternating with the above. 
Habitat.—Torres Straits, Hong-Kong. 
THALASSOPHIS. 
THALASSOPHIS ANOMALUS (Schmidt). 
Thalassophis anomalus, Schmidt in Abhandl. Nat. Hamb., 1852, ii, p. 81, pl. iv. 
in xf Boulgr., Cat., 111i, 1896, p. 269. 
Hydrophis anomala, Giinther, Rept. Brit. Ind., 1864, p. 379. 
? Jan, Icon. Gén., 1872, 40, pl. iv, fig. 1. 
”) Ay) 
vite 
Ly 
KEEN 
Fig. 60.—Thalassophis anomalus. Atter Jan, Icon. Gén., 40, pl. iv, fig. 1 
I have seen no specimen. 
Description.—R ostral,—broken up. Interna sals,—narrow, longer than the 
preefrontals. Personally I regard these as detached fragments of the nasals which in 
this species like other head shields are prone to subdivision. (In Jan’s figure confluent 
with the nasals). Prafrontals,—four ? in one transverse series, the outer not in 
contact with any supralabial. Frontal,—entire? (divided transversely in Jan’s 
figure). Supraoculars,—entire. Parietals,—entire (showing a tendency to 
disintegration in Jan’s figure). Nasals,—lateral; in contact with the first three 
supralabials. Preoculars,—one. Postoculars,—two. Tem porals,—two or 
three, small, scale-like. Supralabial,—seven to nine, showing a tendency to 
subdivision (in Jan’s figure the first and sixth are horizontally divided) ; the fourth, 
fifth and sixth touching the eye. Infralabials,—the fourth is the largest of the 
series, and in contact with four scales behind. Ma rginals,—absent. Sublinguals, 
