4 6 



INTRODUCTION 



A. Mandible with coronoid bone ; nasals in sutural 

 contact with frontals and prefrontals ; trans- 

 verse bone short, not projecting much beyond 

 cranium ; maxillary not half as long as 



Fig. 7 — Skull of Zamenis gemonensis. (From British Museum 



Catalogue of Snakes) 



mandible, which is not longer than skull (to 



occiput) Eryx. 



B. No coronoid bone ; nasals isolated. 



i. Maxillary elongate, not movable vertically. 

 a. Maxillary half as long as mandible. 

 Supratemporal half as long as skull, projecting far 



