MOOE, STUDY OF THE MORRISON FORMATION 143 



Ceratosaurus nasicornis Marsh 



C eratosaurus nasicornis Marsh, Principal Characters of American Ju- 

 rassic Dinosaurs. Pt. VIII. The Order Theropoda. Amer. Journ. 

 Sci., 3rd ser., vol. xxvii, p. 329 (330), 1884. 



Probably from the middle beds of the Morrison formation near Caiion 

 Cit}^, Colorado. Most of the skeleton is known. 



Ornitholestes hermanni Osborn 



Ornitholestes hermanni Gsborn, Ornitholestes Hermanni, a New Comp- 

 sognathoid Dinosaur from the Upper Jurassic. Amer. Mus. Nat. Hist., 

 Bull., vol. xix, art. xii, p. 459, 1903. 



From "Bone Cabin Quarry" near Medicine Bow, Wyoming, in the Mor- 

 rison formation. This form is especially light and small. 



Allosaurus medius Marsh 



Allosaurus medius Marsh, Notice of a New Genus of Sauropoda and 

 other new Dinosaurs from the Potomac Formation. Amer. Journ. Sci., 

 3rd ser., vol. xxxv, p. 89 (93), 1888. 



From the Arundel formation, near Muirkirk, Prince Georges County, 

 Marjdand. Known from teeth only. 



Creosaurus potens Lull 



Creosaurus potens Lull, [Systematic Paleontology], Eeptilia. Md. 

 Geol. Surv., vol. Low. Cret., p. 183, 1911. 



From the Arundel formation in Washington, D. C. Known from frag- . 

 mentary material only. 



Coelurus gracilis Marsh 



Ca:lurus gracilis Marsh, Notice of a New Genus of Sauropoda and other 

 new Dinosaurs from the Potomac Formation. Amer. Journ. Sci., 3rd 

 ser., vol. xxxv, p. 89 (94), 1888. 



From the Arundel formation, near Muirkirk, Maryland. Small part 

 of the skeleton is known. 



PREDENTATA 



Stegosaurus armatus Marsh 



Stegosaurus armatus Marsh, A New Order of Extinct Eeptilia (Stego- 

 sauria) from the Jurassic of the Eocky Mountains. Amer. Journ. Sci., 

 3rd ser., vol. xiv, p. 513, 1877. 



