GENERAL CLASSIFICATION OF POISONOUS SNAKES 7 



Fig. 1. — A, Cranial skeleton of one of the non-poisonous Colubrida; {Ptyas mucosus) ; 

 B, cranial skeleton of one of the poisonous Coluhridm {Naja tripudians) ; c, cranial 

 skeleton of one of the poisonous Colnbridd- (Bungarus fasciahis) ; d, cranial skeleton of 

 one of the Viperidce [Vipera russellii) ; e, cranial skeleton of one of the ViperidcB 

 CrotalincB (Crotalus durissus) ; f, cranial skeleton of one of the Coluhridce Hydro- 

 phiina (Hydroi)his pclamis). 



