MOOK, STUDY OF THE MORRISON FORMATION 149 



CHELONIA 



Compsemys plicatulus Cope 

 (Syn. Glyptops oi-natus Marsh) 



Compsemys plicatulus Cope, On Eeptilian Remains from the Dakota 

 Beds of Colorado. Amer. Philos. Hoc, Proc, vol. xvii, p. 193 (196), 

 1877. 



From the uppermost beds of the Morrison formation near Caiion City, 

 Colorado. Known from a considerable portion of the skeleton. 



PTERO8AVRIA 



Dermodactylus montanus Marsh 



Pterodactylus montanus Marsh, New Pterodactyl from the Jurassic of 

 the Eocky Mountains. Amer. Journ. Sci., 3rd ser., vol. xvi, p. 233, 1878. 



Dermodactylus montanus Marsh, Note on American Pterodactyls, 

 Amer. Journ. Sci., 3rd ser., vol. xxi, p. 342, 1881. 



From the Morrison formation in Wyoming, probably from Como Bluff. 

 Known from various remains of wings, teeth, and vertebras. 



PISCES 



Oeratodus guntheri Marsh 



Ceratodus guntheri Marsh, New Species of Ceratodus, from the Juras- 

 sic. Amer. Journ. Sci., 3rd ser., vol. xv, p. 76, 1878. 



"Jurassic of Colorado." Probably from the middle beds of the Morri- 

 son formation near Caiion City, Colorado. Known from a left lower 

 dental plate. 



Ceratodus robnstus Knight 



Ceratodus rohustus Knight, Some New Jurassic Vertebrates from Wy- 

 oming. Amer. Journ. Sci., 4th ser., vol. v, p. 186, 1898. 



From the Morrison formation in Albany County, Wyoming, associated 

 with crocodile and dinosaur bones. Known from part of a tooth. 



Ceratodus americanus Knight 



Ceratodus americanus Knight, Some New Jurassic Vertebrates from 

 Wyoming. Amer. Journ. Sci., 4th ser., vol. v, p. 186, 1898. 



From the Morrison formation in Carbon County, Wyoming, associated 

 with bones of a carnivorous dinosaur. Known from part of a left man- 

 dibular tooth. 



