112 



XENOPELTID^. 



and fourth entering the eye. Scales in 21 rows. Yentrals 210- 

 215 ; anal divided ; subcaudals 9-10. Blackish brown above, with 

 two white longitudinal streaks ; belly white, with alternating black 

 cross-bands ; head and tail yellowish. 



Total length 730 millim. 



First described from a single specimen from Singapore, this 

 species has since been found in Borneo. This typical specimen 

 was described from a collection sent by Dr.Dennys, who had been 

 much in Borneo and did not label his specimens individually. It 

 is therefore possibly not a Peninsular species. 



Family XENOPELTID^. 



Cranial bones more or less solidly united ; transpalatine present ; 

 pterygoid extending to quadrate ; supratemporal present, sus- 

 pending quadrate ; prsefrontal in contact with nasal ; teeth in 

 jaws, palate, and prsemaxillary ; lower jaw without coronoid bone. 



A single genus. 



Fig. 35.— Upper view of skull of Xenopeltis unicolor. 



ang 



Angular. 

 Articular. 

 bo. Basi occipital. 

 d. Deutary. 

 CO. Exoccipital. 

 /. Frontal. 



Maxillary. 



Nasal. 



Parietal. 



PraBmaxillary. 

 prf. Prefrontal. 

 pro. Prootic. 



P- 



P 



q. Quadi'ate. 



so. Supraoccipital. 

 St. Supratemporal. 

 tp. Transpalatine. 



Genus XENOPELTIS. 



Reiuwardt, iu Bole, Isis, 1827, p. 564. 



Teeth small, equal, closely set, and very numerous (4 on each 

 side of prtemaxillary, 33-38 in eacli maxillary, 35-36 in each 

 ramus of mandible). Deutary bone attached loosely to the apex 

 of the articular and movable on it. Head not distinct from neck; 



