Neio Snakes from Hongkong. 43 



A single female specimen. The pouch is filled with a 

 single layer of very large ova (10 millim. in diameter), 

 sixteen in number. From the size and small number of the 

 ova it may be safelj predicted that the young undergo the 

 whole of the metamorphoses within the pouch, as in N. ovi- 

 ferum, which is the nearest ally oi N. Jissipes. 



VI. — Description of two new Snakes from Hongkong^ and 

 Note on the Dentition of Hydrophis viperina. By G. A. 

 BOULENGER. 



The snakes described below were obtained, through the 

 kind mediation of Dr. J. Anderson, F.R.S., from the Direc- 

 tors of the City Hall Museum, Hongkong. They were 

 labelled as from Hongkong, presented to the City Hall 

 Museum by C. Ford, Esq. 



Achalinus rufescens. 



Head narrow, elongate. Suture between the internasals 

 twice as long as that between the preefrontals ; frontal 

 broader than long, half as long as the parietals ; only the 

 upper anterior temporal in contact with the eye ; three shields 

 bordering the parietals on each side, the third very large and 

 separated from its fellow by a small azygos occipital j five 

 upper labials, third and fourth entering the eye, fifth much 

 elongate ; five lower labials, third much elongate, first in con- 

 tact with its fellow behind the mental ; three pairs of large 

 chin-shields, succeeded by the ventrals, first and second 

 longer than broad, third as long as broad. Scales strongly 

 keeled, some distinctly tricarinate, in twenty-five longitudinal 

 series j on the anterior half of the body each ventral scute is 

 in contact with the second series of scales. Ventrals 136 ; 

 anal single ; subcaudals 82. Uniform pale reddish brown 

 above ; upper labials and a spot on the temple yellow ; uni- 

 form yellowish beneath. 



Total length 290 millim. ; tail 80. 



Calamohydeus, g. n. (Homalopsinariim). 



Teeth in jaws and palate small, equal. Head rather elon- 

 gate, slightly distinct from neck ; eyes very small, with round 



