292 COLUBBID-S). 



6. Distira semperi. 



Hydrophis semperi, Oarm. Bull. Mus. Comp. Zool, viii. 1881, p. 85. 



Eostral nearly as deep as broad ; nasal grooved from the nostril 

 to the second labial ; frontal little less than twice as long as broad; 

 one prae- and two postoculars ; a single, large anterior temporal ; 

 eight upper labials, third, fourth, and fifth entering the eye ; two 

 pairs of chin-shields, anterior larger. Scales smooth, imbricate^ 

 38 round the middle of the body. Ventrals smaU., 329. Black,, 

 crossed by 67 narrow white bands which do not meet on the belly. 



Lake Taal, Luzon. 



Perhaps specifically identical with the preceding. 



7. Distira snhcincta. 



Hydrophis subcinctus, Gray, Zool. Misc. p. 63 (1842), and Cat. p. 52' 

 (1849) ; Giinth. Rept. Brit. Ind. p. 868, pi. xxv. fig. F (1864). 



Head smaU ; body much elongate ; neck slender, its diameter 

 about one third the greatest depth of the body. Eostral broader 

 than deep ; nasals as long as the frontal, more than twice as long 

 as the suture between the praefrontals ; frontal much longer than 

 broad, hardly as long as its distance from the rostral, much shorter' 

 than the parietals ; one prse- and two postoculars ; a single, large 

 anterior temporal, descending nearly to the border of the mouth ; 

 seven upper labials, second largest, third and fourth entering fche- 

 eye ; two pairs of chin-shields, in contact with each other. 23 to- 

 25 scales round the neck, 35 round the body ; scales feebly imbri- 

 cate, feebly keeled. Ventrals very distinct, 342. " Trunk with 41 

 broad dark cross-bands, about as broad as the interspaces, not 

 extending downwards to the middle of the side ; a series of small^ 

 roundish, blackish spots along the lower part of the sides." 



Total length 1070 millim. ; tail 100. 



Indian Ocean. 



a. § (V. 342). Indian Ocean. (Type.) 



8. Distira brugmansii. 



Hydrophis brugmansii, Boie, Isis, 1827, p. 554. 



nigrocincta, part., Schieg. Phys. Serp. ii. p. 605, pi. xviii, 



figs. 8-10 (1837). 



suhlasvis, Gray, Zool. Misc. p. 62 (1842). 



Hydrus striatus, part'., Cantor, Cat. Mai. Mept. p. 126 (1847). 



Hydrophis sublsevis, part.. Gray, Cat. p. 52 (1849). 



nigrocincta [non Daud.), Fischer, Ahh. Naturw. Samb. iii.- 



1856, p. 46, pi. i. 



cyanooincta, part., Giinth. Rept. Brit. Ind. p. 367 (1864). 



robusta, Giinth. l. c. p. 364 ; Fayrer, Thanatoph. Ind. pi. xxi. 



(1874) ; Murray, Zool. Sind, p. 394 (1884) ; Anders. Journ. Linn.- 



Soc. xxi. 1889, p. 847. 



rappii, Jan, Icon. G6n. 41, pi. iv. fig. 1 (1872). 



temporalis, Blanf. Proc. Zool. Soc. 1881, p. 680, fig. 



bishopii, Murray, I. c. p. 391, pi. — . 



Distira robusta, Bouleng. Faun. Ind., P^pt. p. 409 (1890). 



