A MONOGRAPH OF THE SHA-SNAKES (HYDROPHIIN 4) 189 
ATIPYSURUS. 
Ixey to the species of Aipysurus. 
(A) Costals in midbody 17... ae ie os ats eydouxnt. 
(B) Ditto TOI eats a : une Be australis. 
(C) Ditto 21 to 25 is Be a3 13 levis. 
AIPYSURUS EYDOUXII (Gray). 
Tomogaster eydouxii, Gray, Cat., 1849, p. 59. 
Aipysurus anguilleformis, Grinther, Rept. Brit. Ind., 1864, p. 357. 
levis, Jan, Icon. Gen., 1872, livr. 40, pl. u, fig. 1. 
”) 
Sa 
Ctess eae 
Sr yy re} 
HN 
B Kh or 
A Cc 
Fig. 5.—Aipysurus eydouxtt (levis). After Jan, Icon. Gén., 1872, livr. 40, pl. il, fig. 1. 
I have examined six specimens. 
Description.—Rostral,—touches four shields; the portion visible above about 
half the internasal suture. Prefrontals,-- touch no supralabial, usually undivided, 
but sometimes divided longitudinally on one or both sides intotwo parts. Frontal,— 
touches six shields, all the sutures sub-equal; one-third to one-fourth longer than the 
supraoculars, longer than the parietals. Parietals, - entire; sometimes obliquely 
divided. Nasals,—in contact with the first and second supralabials. Preocu- 
lars,—one. Postoculars,—two. Temporals,—one or two. Supralabials, 
six, the sixth longest, the fourth only touching the eye (the third also in one specimen 
on the left side). Infralabials,—the fourth is the largest of the series, and touches 
two scalesbehind. Marginals,—absent. Sublinguals,—two pairs, the posterior 
quite separated by a scale. Costals,—smooth; anteriorly 17, midbody 17, poste- 
tiorly 15, (17 in one) the reduction from 17 to 15 takes place close to the site where 
I count the scales posteriorly and is effected by a tusion of the third and fourth rows 
above the ventrals. Ventrals,—138 to 142, three or more times as broad as the 
last costal row; obtusely keeled in the posterior part of the body. Colour,—yellow 
ot yellowish, with dark brown dorsal bars ending in the flanks, or broken up into 
ventral spots. : 
Habitat.—Indian Ocean, Singapore, Java, Philippines. 
AIPYSURUS AUSTRALIS (Sauvage). 
Aipysurus australis, Sauvage in Bull. Soc. Philom., (7), 1, 1877, p. 114. 
a fuscus, Giinther, Rept. Brit. Ind., 1864, p. 358. 
(For a figure of this see fig. 6 on plate vii.) 
