MOOK, STUDY OF THE MORRISON FORMATION 145 



Stegosaurus sulcatus Marsh 



Stegosaurus sulcatus Marsh, Principal Characters of American Jurassic 

 Dinosaurs. Pt. IX. The Skull and Dermal Armor of Stegosaurus. 

 Amer. Journ. Sci., 3rd ser., vol. xxxiv, p. 413 (415), 1887. 



ISTo locality is given. Part of the skeleton is known. 



Stegosaurus duplex Marsh 



Stegosaurus duplex Marsh, Principal Characters of American Jurassic 

 Dinosaurs. Pt. IX. The Skull and Dermal Armor of Stegosaurus. 

 Amer. Journ. Sci., 3rd ser., vol. xxxiv, p. 413 (416), 1887. 



Locality not given. Posterior portion of the skeleton known. 



Diracodon laticeps Marsh 



Diracodon laticeps Marsh, Principal Characters of American Jurassic 

 Dinosaurs. Pt. V. Amer. Journ. Sci., 3rd ser., vol. xxi, p. 417 (421), 

 1881. 



From the Atlantosaurus beds of AVyoming, probably from Como Bluff. 

 Very little of the skeleton is known. 



Stegosaurus longispinus Gil more 



Stegosaurus longispinus Gilmore, Osteology of the Armored Dinosauria 

 in the United States Xational Museum, with Special Eeference to the 

 Genus Stegosaurus. U. S. Xat. Mus., Bull. No. 89, 136 pp., 37 pis., 73 

 figs., 1914. 



Prom the Morrison 11/2 miles east of Alcova, Xatrona County, Wy- 

 oming. Characteristic portions of the skeleton are known. 



Hoplitosaurus marshi Lucas 



Hoplitosaurus marslii, from the Dakota beds of the Black Hills region, 

 may also occur in the Morrison formation, but has not lieen definitely 

 reported. 



Camptosaurus dispar Marsh 



Camptonotus dispar Marsh, Notice of New Jurassic Reptiles. Amer. 

 Journ. Sci., 3rd ser., vol. xviii, p. 501, 1879. 



Camptosaurus [dispar'] Marsh, Names of Extinct Reptiles. Amer. 

 Journ. Sci., 3rd ser., vol. xxix, p. 169, 1885. 



No locality given. Characteristic portions of the skeleton are known. 



