230 



on each side of the head. Length of head and body 865 mm.; 

 tail 105 mm. 



Habitat: Borneo!. — Bay of Bengal; Pegu; Gulf of Siam, 



6. Hydrophis fasciatus (Schneider). 



Hydrus fasciatus^ Schneider, Hist. Amph. I 1799, p. 240. 



Hydrophis fasciatus^ Boulenger, Cat. Sn. Ill 1896, p. 281; Rept. Malay Penins. 

 1912, p. 189. 



Head very small; eye a little longer than its distance from 

 the mouth. Rostral almost as deep as broad; praefrontals usually 

 in contact with the second upper labial; frontal more long than 

 broad, as long as its distance from the rostral; one prae- and 

 one or two postoculars; a single anterior temporal; six or 

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

 pairs of chin-shields in contact. Body long, very slender ante- 

 riorly; scales imbricate, sometimes juxtaposed posteriorly, 

 smooth on the neck, with a tubercle or keel on the body, in 

 40 — 48 rows (25 — 31 anteriorly); ventrals 345 — 500, entire. 



Pale above, \vith 48 — 71 black bands or annuli, sometimes 

 expanded vertebrally and lost ventrally in old specimens; 

 head and neck black; neck with yellow transverse bands. 

 Length of head and body 915 mm.; tail 85 mm. 



Habitat: Sumatra! (Bantung river near Tandjung Laut 

 in Palembang); Borneo (coast of N. Borneo); Java (Cheribon 

 Sea!, Pasuruan!); Aru Islands; New Guinea (Kaiser Wilhelms- 

 land). — Coasts of India, Siam, China; Penang. 



7. Hydrophis brookei Gthr. 



Hydrophis brookii^ Giinther, Pioc. Zool. Soc. 1872, p. 597, fig. 5. 

 Hydrophis brookii^ Boulenger, Cat. Sn. Ill 1896, p. 282. 



Head very small; rostral more broad than deep; praefrontal 

 in contact with the second labial; frontal more long than 

 broad, as long as its distance from the tip of the snout, much 

 shorter than the parietals; one prae- and one postocular; a 

 single anterior temporal, followed by another large one; six 

 upper labials, third and fourth entering the eye, second largest; 

 both pairs of chin-shields in contact. Body long, extremely 

 slender in the fore part, covered with rhomboidal, imbricate 

 scales, smooth on the neck, with a tubercle or keel on the 

 body, in 42 rows (30 anteriorly); ventrals 416, feebly enlarged. 



