SKELETON 



49 



Quadrate longer than supratemporal ; maxillary 

 little longer than quadrate, nearly straight in front 

 of prefrontal Tarbophis. 



W f />/-" p rr°.sie 



or. 



Fig. io — Skull of Vipera lebetina. (From British Museum 



Catalogue of Snakes) 



Lettering of the bones as in Fig. 3 



2. Maxillary much abbreviated and erectile ; 

 supratemporal not half as long as skull ; 

 mandible much longer than skull ; basioc- 

 cipital with a strong process. 

 4 



