Creatosaurus. Upper Jurassic. 



Allosaurus. Upper Jurassic. 



Hallopus. Upper Jurassic. 



Thecospondylus. Triassic to Upper Jurassic. 

 Sub-order 2. 

 S auropoda. ( Herbivores ) . 



Camarasaurus. Upper Jurassic. 



Morosaurus. Upper Jurassic. 



Apatosaurus. Upper Jurassic. 



Brontosaurus. Upper Jurassic. 



Titanosaurus. Cretaceous. 



Diplodocus. Upper Jurassic. 

 Sub-order 3. 

 Predentata. (Herbivores) 



Camptosaurus. Upper Jurassic. 



Iguanodon. Upper Jurassic to Cretaceous. 



Trachodon. Upper Cretaceous. 



Stegosaurus. Upper Cretaceous. 



Triceratops. Upper Cretaceous. 



Ceratops. Upper Cretaceous. 



Order IX. 

 PTEROSAURI A ( Extinct air-bourne reptiles ) 

 Sub-order 1. 

 Pterodermata. 



Dimorphodon. Lower Jurassic. 

 Rhamphorhynchus. Upper Jurassic. 

 Sub-order 2. 

 Ornithocheiroidea. 

 Pterodactylus. Jurassic. 

 Myctodactylus. Cretaceous. 

 Pteranodon. Cretaceous. 

 Ornithocheirus. Lower Cretaceous. 



WILLARD ROUSE JILLSON, B.S., M.S. 

 Department of Geology Lexington, Kentucky 



University of Kentucky, December 10, 1918. 



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