Lacertilia. (Lizards.) 

 Glyptosaurus. Lower Eocene. 

 Sub-order 4. 



Ophidia. (Snakes.) 

 Paleophis. Lower Eocene. 

 Heteropython. Miocene. 



Order III. 

 ICHTHYOSAURIA. (Extinct Marine reptiles). 

 Ichthyosaurus. Triassic to Cretaceous. 



Order IV. 

 SAUROPTERYGIA. (Primitive aquatic reptiles.) 

 Nothosaurus. Triassic. 

 Plesiosaurus. Triassic to Cretaceous. 



Order V. 

 THEROMORPHA. (Primitive land reptiles.) 

 Sub-order 1. 

 Pareiasauria. 



Pareiasaurus. Permian to Triassic. 

 Sub-order 2. 

 Sphenacondonia. 

 Clepsydrops. Permian. 

 Sphenacodon. Permian. 

 Varanosaurus. Permian. 

 Sub-order 3. 

 Theriodonta. 



Lycosaurus. Karoo-Mesozoic. 

 Sub-order 4. 

 Anomodontia. 



Dicynodon. Karoo-Mesozoic. 

 Sub-order 5. 

 Placodontia. 



Placodus. Triassic. 



Order VI. 

 CHELONIA. (Extinct and living turtles). 

 Sub-order 1. 

 Trionychoidea. 

 Trionyx. Miocene. 



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