209. DISTIRA. 299 
relatively large anteriorly, bitubcrculate in the male, 235-267. 
Slaty grey above, with rhomboidal transverse black spots, white or 
pink on the sides and inferiorly; some specimens uniform dark 
grey above; in the young the black spots are continued down the 
sides of the body ; end of tail black. 
Total length 920 millim. ; tail 100. 
From the Persian Gulf and the Mekran Coast, round the coasts of 
India and Burma to Java, Hong Kong, and Hainan. 
a. 2 (V. 260). Muscat, A. S. G. Jayakar, Esq. [P.]. 
(Type of H. jayakarz.) 
b. 2 (V. 248). Bombay. H. M. Phipson, Esq. [P.]. 
e. Hgr. (V. 245). Malabar. Col. Beddome | C.}. 
d. Yg. (V. 237). Madras. T. C. Jerdon, Esq. ey 
e. 2 (V. 245). Hong Kong. City Hall Museum | E. |. 
J: 2 CV. 235). Indian Ocean. 
18. Distira jerdonii. 
Russell, Ind. Serp. ii. pl. xii. (1801). 
Hydrus nigrocinctus, var., Cantor, Cat. Mal. Rept. p. 129, pl. xl. 
fig. 8 (1847). 
Kerilia jerdonii, Gray, Cat. p. 57 (1849). 
Hydrus cantori, Jerdon, Journ. As. Soc. Beng. xxii. 1854, p. 526. 
Hydrophis jerdonii, Giinth. Rept. Brit. Ind. p. 362, pl. xxv. fig. B 
(1864) ; Anders. Proc. Zool. Soc. 1871, p. 190; Fayre, Thanatoph. 
Ind. pl. xx. (1874). 
Distira jerdonii, Bouleng. Faun. Ind., Rept. p. 408 (1890); Boetig. 
Mitth. Geogr. Ges. u. Nat. Mus. Bremen, (2) v. 1893, p. —. 
_ Head short ; snout declivous and rather pointed; body mode- 
rately elongate. Rostral as deep as broad; nasals shorter than 
the frontal, more than twice as long as the suture between the 
prefrontals; frontal longer than broad, nearly as long as its 
distance from the end of the snout, shorter than the parietals; one 
pre- and one postocular; five upper labials, third and fourth 
entering the eye; a single large anterior temporal, descending to 
the labial margin. 15 or 17 scales round the neck, 19 or 21 round 
the body; scales broader than long, slightly imbricate, strongly 
keeled. Ventrals distinct, but feebly enlarged, more or less 
distinctly bituberculate, 224-238. Olive above, yellowish beneath, 
with black cross-bands, which form complete rings in young and 
half-grown specimens; a black spot may be present between each 
pair of annuli. 
Total length 910 millim.; tail 100. 
Bay of Bengal, Straits of Malacca, Borneo. 
a. do (V. 238). Madras. T. C. Jerdon, Esq. [P.]. 
(Type.) 
b. do (V. 228). Madras. F, Day, Esq. [P.]. 
e. Hgr., dry. Pinang. Dr. Cantor. 
d. Q (V. 224). —-? Haslar Collection. 
