208. HTOEoPHis. 277 



lody ; scales all imbricate and keeled, the keels feeble on the neck, 

 fitrong on the body. Ventrals very distinct throughout, 314, 

 smooth or with two tubercles. Greyish white above, yellowish 

 white beneath, with olive cross-bands on the back, wider than the 

 interspaces ; a black streak along the ventrals ; head entirely black. 



Total length 1200 millim. ; tail 90. 



North Coast of Australia. 



a. 5 (V. 314). N. Australia. Capt. King [P.]. 



9. HydropMs nigrocinctus. 



Russell, Ind. Serp. ii. pi. vi. (1801). 



Hydrophis nigrocinctus, Baud. Sept. vii. p. 380 (,1803) ; Crra;/, Cat. 



p. 51 (1849); GiiTiih. JRept. Brit. Ind. p. 368, pi. xxv. fig. L 



(1864) ; Fayrer, Tkanatoph. Ind. pi. xxv. (1874) ; Bouleng. Faun. 



hid., Uept. p. 400 (1890). 

 Enhydiis nigrocinctus, Merr. Tent. p. 140 (1820). 

 Hydius nigrocinctus, Boie, Isis, 1827, p. 553. 

 Hydrophis nigrocinctus, part., Schleg. Phys. Serp. ii. p. 505 (1837) ; 



Bum. 8f Bibr. vii. p. 1360 (1854). 



Head small; anterior part of body slender, its diameter one 

 third to two fifths the depth of the posterior part. Eostral broader 

 than deep ; nasals shorter than the frontal, about twice as long as the 

 suture between the praefrontals ; frontal longer than broad, as long 

 as its distance from the end of the snout, shorter than the parietals; 

 one prse- and one or two postoculars ; a small loreal sometimes 

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

 second and fourth largest ; two superposed anterior temporals ; two 

 pairs of subequal chin-shields, posterior separated by scales. 27 or 

 29 scales round the neck, 39 round the body; scales imbricate, 

 rhombic, keeled. Ventrals distinct, but feebly enlarged, 310-331. 

 Pale olive above, yellowish inferiorly, with black annuli, which are 

 broader on the back. 



Total length 1000 millim. ; tail 100. 



Bay of Bengal and Straits of Malacca. 



a. O (V. 323). Sunderbunds, Bengal. Dr. P. Russell, College of 



Surgeons [E.]. (Type). 



b. S (V. 323). Bengal. Gen. Hardwicke fP.l. 

 e. 2 (V. 310). India. Gen. Hardwicke [P.]. 

 d. Hgr. (V. 310). Malay Archipelago. Dr. Bleeker. 



10. HydropMs mamiUaris. 



Russell, Ind. Serp. i. pi. xliv. (1796). 



Anguis mamUlaris, Baud. Rept. vii. p. 340 (1803). 



Hydrophis fasciata (non Schn.), Ounth. Rept. Brit. Ind. p. 374, 



pi. xxv. fig. Q (1864). 

 mamiUaris, Bouleng. Faun. Ind., Rept. p. 401 (1890). 



Head very small ; anterior part of body very slender, its diameter 

 about one third the depth of the posterior part. Rostral broader 

 than deep ; frontal longer than broad, as long as its distance from 



