404 COLTTBBID.E. 



50 1. Hydrophis fasciatus. 



Hydras fasciatus, Schntid. Hist. Amph. i, p. 240. 



Hydrophis gracilis, part., Schleg. P/ii/s. Serp. ii, p. 507 ; Dam. 4" 



*Bibr. vii, P. 1352; Jan, Icon. Ophid. 41, pi. iv, fig. 2. 

 Hydrophis chloris (non Daud.), G'tinth. Sept. B. I. p. 370; Anders. 



P. Z. S. 1871, p. 191, and 1872, p. 396 ; Fayrer, Thanatoph. 



pi. xxvii ; Murray, Zool. Sind, p. 392. 

 Aturia lindsayi, Gray, Zool. Misc. p. 61. 

 Hydrophis lindsayi, Gray, Cat. Sn. p. 50 ; Giinth. Rept. B. I. p. 371 ; 



Anders. P. Z. S. 1871, p. 191, and 1872, p. 393; Murray, Zool. 



Sind, p. 392. 

 Hydrophis atriceps, Giinth. R;p'. B. I. p. 371, pi. xxv, fig. I. 



Head very small; body long, extremely slender anteriorly*. 

 Eostral nearly as deep as broad ; frontal longer than broad, as 

 long as its distance from the rostral ; one prae- and one or two 

 postoculars ; a single anterior temporal, followed by a second equally 

 large : 6 or 7 upper labials, third and fourth entering the eye ; 

 two pairs of small chin-shields, in contact with each other. 25 to 

 31 scales round the neck, 40 to 48 round the middle of the body ; 

 all the scales rhomboidal and imbricate, on the iieck smooth, on 

 the body with a small tubercle or short keel. Yentrals feebly 

 enlarged, 345-500. Head and neck black, the latter with yellowish 

 cross bands ; body pale, with black cross bauds or annuli, which 

 are broadest on the back. 



Total length 3 feet 3 inches. 



Hab. From the coast of India to Siam and the Indian 

 Archipelago. 



502. Hydrophis gracilis. 



Russell, Ind. Serp. ii, pi. xiii (male). 



Hydrus gracilis, Shaw, Zool. iii, p. 560. 



Thalassophis microcephala, Schmidt, Abh. Natunc. Hamb. ii, 



2e Abth. 1852, p. 78, pi. ii. 



Hydropliis gracilis, part., Dum. Sf Bibr. Erp. Gen. vii, p. 1352. 

 Hvdrophis microcephala, Dum. $ Bibr. t. c. p. 1356 ; Jan, Icon. 



'Ophid. 41, pi. v, fig. 2. 

 Hydrophis gracilis, Gilnth. Rept. B. I. p. ,"73 ; Murray, Zool. Sind, 



"p. 395. 

 Hydropbis guentheri (non Theob.), Murray, I. c. p. 396, pi. . 



Head very small, narrow ; body long, extremely slender ante- 

 riorly. Snout strongly projecting bayond the lower jaw ; rostral 

 as deep as broad ; frontal very small, longer than broad, hardly as 

 long as its distance from the rostral ; one prse- and one postocular ; 

 a single anterior temporal, followed by a second equally large 

 shield ; 6 upper labials, third and fourth entering the eye ; two 

 pairs of small chin-shields in contact with each other. 1 9 to 21 



* See footnote under H. coronatus (p. 402). The specimens naiued H. chloris 

 by Dr. Gunther are females, those named H. lindsayi and atriceps are mostly 

 (six specimens out of seven) males. 



