X CONTENTS 



Rhopalodontidae 239 



Titanosuchidae 239 



Suborder Dromasauria 239 



Family Galechiridae 239 



Galeopidae 239 



Macroscelesauridae 239 



Suborder Anomodontia 239 



Family Dicynodontidae 240 



Suborder Theriodontia 240 



Tribe Gorgonopsia 242 



Family Gorgonopsidae 242 



Ictidorhinidae 242 



Burnetidae 242 



Tribe Bauriasauria 242 



Therocephalia 243 



Family Scylacosauridae 243 



Ictidosuchidae 243 



Lycosuchidae 243 



Scaloposauridae 243 



Alopecopsidae 243 



Whaitsidae 243 



Genera incertae sedis . 243 



Tribe Cynodontia 244 



Family Nythosauridae 244 



Cynosuchidae 245 



Cynognathidae 245 



Diademodontidae 245 



Theriodontia (?) incertae sedis 245 



CHAPTER X 



Subclass Synaptosauria 246 



Order Sauropterygia 246 



Suborder Nothosauria 247 



Family Nothosauridae 247 



Suborder Plesiosauria 248 



Family Plesiosauridae 248 



Pliosauridae 248 



Cryptocleididae 250 



Elasmosauridae 250 



Polycotylidae 250 



Brachaucheniidae 251 



Genera incertae sedis 251 



Order Placodontia 251 



Family Placodontidae 252 



CHAPTER XI 



Subclass Parapsida 253 



Order Proganosauria 253 



