235 



contact with the second upper labial; frontal more long than 

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

 one postocular; a single anterior temporal, sometimes des- 

 cending to the border of the mouth; six or seven upper labials, 

 second largest, third and fourth entering the eye; posterior 

 pair of chin-shields usually in contact. Body long; scales im- 

 bricate, smooth in the young, with a tubercle in the adult, 

 in 33 — 35 rows (28 — 29 anteriorly); ventrals feebly enlarged 



270—334. 



Olive or yellowish above, with black annuli, sometimes 



connected by a black ventral band; often round black spots 



between the bands dorsally; head black, with a curved yellow 



marking, extending to the praefrontals; end of tail black. 



Length of head and body 1680 mm.; tail 120 mm. 



Type-specimen examined in the British Museum. 



Habitat: "Malay Archipelago"; Sumatra!; Indian Ocean ! — 

 Coast of India; Ceylon. 



15. Hydrophis grandis (Boulenger). 



Distira gra?tdis.^ Boulenger, Cat. Sn. Ill 1896, p. 293, pi. XVI. 



Head small; rostral as deep as broad; nasals shorter than 

 the frontal, two or three times the length of the suture between 

 the praefrontals; latter in contact with the second labial; 

 frontal more long than broad, as long as or longer than its 

 distance from the rostral, shorter than the parietals; one prae- 

 and two postoculars ; a. single anterior temporal; seven upper 

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

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

 cate, keeled, in 41 — 45 rows (27 — 29 anteriorly); ventrals small, 

 smooth in the female, with two tubercles in the male, 372 — 400. 



Olive-grey above, yellowish on the sides and below; neck 

 with dark transverse bars, disappearing on the body. Length 

 of head and body 2140 mm; tail 160 mm. 



Habitat: "Malay Archipelago"! — Queensland. 



16. Hydrophis hybridus Schlegel. 



Hydrophis hybrida^ Schlegel, Abbild. 1844, p. 1 15, pi. XXXVII. 

 Hydrophis hybridus^ Boulenger, Cat. Sn. Ill 1896, p. 274. 



Head moderate; rostral more broad than deep; nasals more 

 than twice the length of the suture between the praefrontals; 

 frontal much more long than broad, as long as its distance 



