208. HYDROPHIS. 
Frontal as long as its distance from 
the rostral ; ventrals 310-438 .... 
5. 31 scales round the neck, 58 round the body ; ventrals 483. 
22. leptodira, p. 285. 
273 
21. obscurus, p. 284. 
TABLE SHOWING NumBERS oF SCALES AND SHIELDs. 
Lab. Ant. 
Se. neck. | Sc. body. ¥. ent. eye.| temp. 
SUE, asi sciinavens- 28-29 33-35 270-334 2 1 
polyodontus ....0..000+ ? 45 ? 2 1 
SCHUSCOSUS... ceacseeaeees 32 47 235-306 2 2 
Aybridus .....c.ccsersee 32 43 ? 2 2 
TONGICEDS ....00sceceeess 28-30 34 271 2 2 
CETULESCENS 1. seeseseee 35-38 48-50 285-309 2 2 
Frontalts ..ccccccccccees 34 42 291 2 2 
MOROUE 6 xcaui ser ansaess 27 37 314 2 2 
NEGTOCINCEUS —ssrasenee 27-29 39 310-331 2 2 
MOAMILATIS ....0.00000- 25-27 35 287-316 2 2 
RIG ONG; 5 bic dccdssindeeds 27-30 41-43 350-385 2 1 
DOARCUB Joven soncenen’s 27-29 37-39 310 3 1 
latifasciatus .....006. 21 33 322 2 1 
COTONALUS — ..cesescsces 19-23 29-33 278-337 2 1 
CUES Masco sete dens 19-21 29-33 225-297 2 1 
CANLOTIS .....0.cecseees 23-25 41-43 412-456 2 1 
TOSCHALUS: .0. .00scccaseee 25-31 40-48 345-500 2 1 
DMONANE sis caeonscacsteses a 42 416 2 1 
melanocephalus ...... 25 35 329 2-3 1 
COT QUATUS 2+ .ecceseeeees 33-35 43-45 240-285 2 1 
ODSCUTUS ....eceereeeees 40-50 310-438 2 1 
LEPLOUATG, ...s.<csvcvesss 31 58 483 2 1 
1. Hydrophis spiralis. 
Hydrus spiralis, Shaw, Zool. iii. p. 564, pl. exxv. (1802). 
Enhydris spiralis, Merr. Tent. Pt 140 (1820) 
. Amph. ti iii. eae 
Hydrophis melanurus, Wagl. 
— nigrocincta, part., Schleg. Phys. Serp. li. p. 
54 (1859); Giinth. Rept. Brit. Ind. 
p. 866, pl. xxv. fig. D 1864) ; Anders. Proc. Zool. Soc. 1872, 
p. 897 ; Murray, 
spiralis, Gray, Cat. 
505 (1837). 
Zool. Sind, p. 390 ( (1884); Bouieny. Faun. Ind., 
Rept. p. 401 (1890) ; Boettg. Ber. Offend. Ver. Nat. 1892, p. 88. 
nigrocinctus, Jan, Icon. Gén. 41, pl. ii. fig. 2 (1872). 
Head moderately small; body moderately elongate. 
broader than deep; frontal longer than broad, as long as its distance 
from the rostral, a little shorter than the parietals; one pre- and 
one postocular; a single anterior temporal, descending to the labial 
border ; six or seven upper labials, second largest, third and fourth 
entering the eye; two pairs of subequal chin-shields, in contact. 
28 or 29 scales round the neck, 33 to 35 round the body; scales 
imbricate, smooth in the young, with a central tubercle in the adult. 
Olive above, 
Ventrals distinct, but feebly enlarged, 270-334. 
VOL, Ii. 
Tt 
Rostral 
