MOOK, STUDY OF THE MORRISON FORMATION 141 



Dryptosaurus trihedrodon Mavsh, Notice of a new and Gigantic Dino- 

 saur. Amer. Journ. Sci., 3rd ser., vol. xiv, p. 87, 1877. [Footnote to 

 p. 88 states Lcelaps Cope to be preoccupied by Lcelaps Koch. Drypto- 

 saurus is proposed to replace it.] 



Discovered near Caiion City, Colorado. Probably from the uppermost 

 beds of the Morrison formation. Known from fragmentary remains only. 



Hypsirophus discurus Cope 



Tlypsiroplius discurus Cope, A New Genus of Dinosauria from Colo- 

 rado. Amer. Nat., vol. xii, p. 188, 1878. 



Probably from the uppermost beds of the Morrison formation near 

 Caiion City, Colorado. Known from part of the skeleton. 



AUosaurus fragilis Marsh 



Allosaurus fragilis Marsh, Notice of New Dinosaurian Eeptiles from 

 the Jurassic formation. Amer. Journ. Sci., 3rd ser., vol. xiv, p. 514 

 (515), 1877. 



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

 son formation near Caiion City, Colorado. Known from practically com- 

 plete skeletons. 



Oreosaurus atrox Marsh 



Creosaurus atrox Marsh, Notice of New Dinosaurian Eeptiles. Amer. 

 Journ. Sci., 3rd ser., vol. xv, p. 241 (243), 1878. 



From the "Upper Jurassic of the Eocky Mountains," probably the 

 middle beds of the Morrison formation near Caiion City, or near Morri- 

 son, Colorado. Known from representative portions of the skeleton. 



Antrodesmus lucaris (Marsh) 



AUosaurus lucaris Marsh, Notice of New Dinosaurian Eeptiles. Amer. 

 Journ. Sci., 3rd ser., vol. xv, p. 241 (242), 1878. 



Ldbrosaurus lucaris Marsh, Principal Characters of American Jurassic 

 Dinosaurs. Amer. Journ. Sci., 3rd ser., vol. xvii, p. 86" (91), 1879. 



Antrodesmus lucaris Hay, Bibliography and Catalogue of the Fossil 

 Vertebrata of North America. U. S. Geol. Surv., Bull. No. 179, p. (489), 

 1902. 



From the "Upper Jurassic of the Eocky Mountains," probably from 

 the middle beds of the Morrison formation near Canon City, or near 

 Morrison, Colorado. Small part of the skeleton is known. 



