28fe 



Captain f. wall Oft 



Rostral, — portion seen above about half the suture between the nasals. Prefrontals 

 touch no supralabial. Frontal, — parietal suture largest, but not twice prefrontals, 

 Temporals, — one large anterior, with one subequal shield behind touching the parietal. 

 Marginal, — one, cuneate, between the 3rd and 4th infralabials. Infralabials, — four. 

 Suture between the first greater than that between the anterior sublinguals ; 4th largest, 

 and in contact with three scales behind. Sublinguals, — two well- developed pairs, 

 both in contact. Costals, — imbricate everywhere. 



I have little hesitation in making this a new species. The specimen is a young 

 one in excellent preservation, and in colour and markings exactly like young examples 

 of H. fasciatus and H. gracilis, but differing from both in scale and shield characters 

 in many ways. 



From H. gracilis the greater number of costals and ventrais sufficiently distinguishes it 

 apart from many differences in head shields. 



From H. fasciatus the fewer number of costals and ventrais, apart from head shield 

 characters, will suffice to proclaim it distinct. 



11. Hydrophis alcocki. sp. nov. 

 Distira robusta, Sclater, List. Snakes hid. Mus., 1891, p. 65, No. 8244. 



Rostral, — portion visible above less than half the suture between the nasals. Pre- 

 frontals touch no supralabial. Frontals,— parietal sutures subequal to prefrontals. 

 Temporals, — one large anterior, behind which are two small scales in contact with the 

 parietals. Marginals, — two behind the 3rd infralabial and cutting the 4th off from the 

 labial margin, hifralabia Is, —four. Suture between the first subequal to that between 

 the anterior sublinguals ; 4th largest, and in contact with three scales behind. Sub- 

 linguals,— two well- developed pairs both in contact. Costals, -imbricate everywhere. 



There is no doubt about this being a new species which I venture to call after 

 Colonel Alcock, to whom I am indebted for the pleasure of examining the very large 

 collection in the Indian Museum. The single specimen is a young one with perforate 

 navel. Its locality is Puri, Orissa. There are 40 well-defined brown annuli, rather 

 broader vertebrally, and confluent ventrally. These are at midcosta about twice as 

 broad as the intervals. 



12. Hydrophis neglectus, sp. nov. 

 Hydrophis obscurus, Sclater, List Snakes hid. Mus., 189 1, p. 63, No. 8598. 





Habitat. 



Donor. 



Scales. 





Museum 



No. 



1 Two head's- 



lengths 

 behind head. 



Midbody. 



Two head's- 



lengths 

 before vent. 



Ventrais. 



8598 



Rangoon 



J. Armstrong 



48? : 54? 



1 



45 



Exceed 

 420 



