404 coixmuiDJE. 



501. Hydrophis fasciatus. 



Hydnis fasciatus, Schneid. Hist. Ainph. i, p. 240. 



Hvdi'0])his gracilis, part., Hclileg. P/n/!?. Serp. ii, p. 507 ; Vain. Sf 



Bibr. vii, p. 1352; Jan, Icon. Ophid. 41, pi. iv, tig. 2. 

 Hvdrophis chloris {non Daud.), Gdnth. Rept. B. I. p. 370; Anders. 



P. Z. S. 1871, p. 191, and 1872, p. 396; Fui/rer, Thancdoph. 



pi. xxvii ; Murray, Zoul. Shid, p. 392. 

 Aturia lindsayi, Grai/, Zool. Misc. p. 61. 

 Hydrophis lindsayi, Graif, Cat. Sn. ]). 50 ; Guntli. Rept. B. I. p. 371 ; 



Anders. P. Z. S. 1871,' p. 191, and 1872, ]>. 39t3; Murray, Zool. 



Sind, p. 392. 

 Hj'dropliis atriceps, Giinfli. 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 prse- and one or two 

 ])Ostoculars ; 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 neck smooth, on 

 the body with a small tubercle or short keel. Yeiitrals 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. 



Hub. From the coast of India to ISiam and the Indian 

 Archipelago. 



502. Hydrophis gracilis. 



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



Ilydrus gracilis, Shan-, Zool. iii, ]). 500. 



Thalassopbis microcephala, Scltmidt, Abh. Kalurio. Ilainb, ii, 



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

 Ilydropliis gracilis, part., Duni. Sf Bibr. Erp. Gen. A"ii, ]). 1352. 

 lIvdro])his microcephala, Z)«w(. ^- Bibr. t. c. p. 1350; Jan, Icon. 



0/j;»V7. 41,pl, V, tig. 2. 

 Hvdrophis gracilis, Gdnth. Rept. B. I. p. 373 ; Murray, Zool. Sind, 



p. 395. 

 Hydrophis guentheri {non Theob.), Murray, I. c. p. 396, pi. — . 



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

 riorly. Snout strongly projecting beyond the lower jaw ; rostral 

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

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

 a single anterior temporal, followed by a second equally large 

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

 pairs of small chin-shields in contact with each other. 19 to 21 



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

 bj' Dr. Giinther are females, those named //. lindsayi and atriceps are mostly 

 (six specimens out of seven) males. 



