402 - COLUBRID.i:. 



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

 one third the depth of the posterior part. Eostral broader tliau 

 deep ; nasals slightly longer than the frontal, more than twice as 

 long as the suture l)et\veen the prajfrontals ; frontal small, longer 

 than broad, much shorter than the parietals, or thau its distance 

 from the rostral; one prae- and one postocular ; prsefrontal in con- 

 tact with the second labial ; 6 upper labials, second largest, third 

 and fourth entering the eye ; a single, large anterior temporal ; 

 t\\o pairs of chiu-shields, posterior separated by scales. 21 scales 

 round the neck, 3;3 round the middle of the body ; scales imbricate 

 and keeled. Ventrals distinct, but feebly enlarged, 322. Dark 

 olive, sides with vertical yellowish bars ; these bars continuous 

 across the neck. 



Total length 20 inches. 



Hah. Mergui : a single specimen. Blauford records a second 

 from Pegu. 



498. HydropMs coronatus. 



Ilvdrophis coronata, (riuith. liept. B. I. p. 372, pi. xxv, fig. M ; 

 ^Anders. P. Z. 6'. 1871, p. 192: Fayrer, Thanatoph. pi. xxvi. 



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

 teriorly*. Eostral broader than deep ; frontal small, longer than 

 broad, hardly as long as its distance from the rostral ; one prse- 

 and one postocular ; a single anterior temporal, descending to the 

 labial border ; 6 upper labials, third and fourth entering the eye ; 

 two pairs of chin-shields, in contact with each other. 19 to 23 

 scales round the neck, 29 to 33 round the middle of the body ; all 

 the scales rhomboidal and imbricate, dorsals with a keel, laterals 

 with a central tubercle. Ventrals hardly distinct, 321-337. Head 

 and neck blackish or dark green, the former with a horseshoe- 

 shaped yellow mark above, the convexity on the snout, the latter 

 with regular yellow cross bands or rings ; body likewise with yellow- 

 cross bands or rings, whicli may be interrupted on the back. 



Total length 3 feet. 



Hah. Coast of Bengal. 1 have examined two specimens (the 

 types), male and female : a fine female is figured by Fayrer. 



499. HydropMs torquatns. 



llvdrophis nij^TuciucUi, jjart., '"Sv/i/cf/. rin/s. Scrp. ii, p. oOO, pi. xviii, 



"tigs. 11 & 12. 

 Hydras nigrociuctus, Cantor, J. A. S. B. xvi, 1847, p. 1049. 

 Hydrophis torquata, G'dnth. Bejyf. B. I. p. 309, pi. xxv, fig. 11. 



* As in H. obscurus and other species, (be neck is proportionally mucli more 

 slender in the female than in the male, as may be seen by the following mea- 

 sm-ements of the two type specimens : — 



(5. Total length 2 feet 1 in. ; diameter of neck 0*25 inch ; greatest depth of 

 body OS inch. 



§. Total length 3 feet; diameter of neck 0'2.5 inch; greatest depth of 

 body l"o inches. 



