202 



SNAKES OF CEYLON. 



(b) Anomalies : Supralabials may be 10 or 11, and two or 

 three labials may touch the eye from the 6th. Subcaudals : 

 Some of the early shields are occasionally entire. 



M 



Fig. 42. — Coluber Helena. 

 (Life size.) 



Dentition. — From 5 skulls in my collection. Maxillary : 

 19 to 25. Palatine: \Q toll. Pterygoid: 15 to 30. Mandi- 

 bular : 22 to 30. 



Distribution. — (a) General: Ceylon, Peninsular India to the 

 Himalayas. In the north-west it extends to Sind, and in 

 the north-east to Assam. 



