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INTRODUCTION 



A . Mandible with coronoid bone ; nasals in suturai 

 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 



