CONTENTS XI 



Family Mesosauridae 255 



Order Ichthyosauria 255 



Family Mixosauridae 256 



Shastosauridae 256 



Ichthyosauridae 256 



Ophthalmosauridae 258 



? Order Omphalosauria 258 



Family Omphalosauridae 258 



Order Protorosauria 259 



Family Araeoscelidae 259 



Protorosauridae 261 



Saphaeosauridae 262 



Pleurosauridae 262 



Order Squamata < .' . . 264 



Suborder Lacertilia (Sauria) 265 



Tribe Kionocrania 266 



Family Geckonidae 266 



Euposauridae 266 



Agamidae 266 



Iguanidae 267 



Anguinidae 267 



Helodermatidae 267 



Lacertidae 268 



Tejidae 268 



Scincidae 268 



Tribe Platynota 269 



Family Varanidae 269 



Dolichosauridae 269 



Aigialosauridae 270 



Tribe Pythonomorpha (Mosasauria) 272 



Family Mosasauridae 273 



Globidentidae 273 



Tribe Amphisbaenia -. 273 



Family Amphisbaenidae 274 



Tribe Rhiptoglossa 274 



Family Chameleontidae 274 



Genera incertae sedis 274 



Suborder Ophidia (Serpentes) 275 



Family Typhlopidae 276 



Boidae (Pythonidae) 276 



Paleophidae 276 



Viperidae 276 



Elapidae 277 



Colubridae 277 



CHAPTER XII 



Subclass Diapsida 278 



? Order Proterosuchia 278 



