4 8 



INTRODUCTION . 



b. Maxillary not half as long as mandible, 



which is longer than skull ; supratemporal 



not half as long as skull, projecting beyond 



cranium. 



Quadrate longer than supratemporal ; maxillary 



Fig. 9 — Skull of Coronella austriaca. (From British Museum 



Catalogue of Snakes) 



much longer than quadrate, nearly straight in front 

 of prefrontal ; a large vacuity between the frontal 



bones and the basisphenoid Ccelopeltis. 



Quadrate not longer than supratemporal ; maxillary 

 little longer than quadrate, strongly curved in front 

 of prefrontal Macroprotodon. 



