144 ANNALS NEW YORK ACADEMY OF SCIENCES 



According to Marsh, the type was found in the Jurassic of the Rocky- 

 Mountains in Colorado, near the locality of Atlantosaurus montanus. 

 This means the Morrison formation at Morrison. Most of the skeleton 

 is known. 



Stegosaurus discurus (Cope) 



Hi/psirophus discurus Cope, A ISTew Genus of Dinosauria from Colo- 

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



Stegosaurus discurus Ha}^, Bibliography and Catalogue of the Fossil 

 Vertebrata of North America. T). S. Geol. Surv., Bull. No. 179, p. 

 (496), 1902. 



Probably from the uppermost beds of the Morrison formation near 

 Canon City, Colorado. Characteristic portions of the skeleton are known. 



Stegosaurus seeleyanus (Cope) 



Hypsirophus seeleyanus Cope, New Jurassic Dinosauria. Amer. Nat., 

 vol. xiii, p. 403 (404), 1879. 



Stegosdurus seelayanus Hay, Bibliography and Catalogue of the Fossil 

 Vertebrata of North America. U. S. Geol. Surv., Bull. No. 179, p. (496), 

 1902. 



Locality not given. Hay notes it as from the "Jurassic, Colorado." 

 Characteristic portions of the skeleton are known. 



Stegosaurus ungulatus Marsh 



Stegosaurus ungulatus Marsh, Notice of New Jurassic Reptiles. Amer. 

 Journ. Sci., 3rd ser., vol. xviii, p. 501 (504), 1879. 



Locality not given in the original description, but the form is known 

 to exist in the Morrison formation. The complete skeleton is known. 

 This is one of the best known members of the Morrison faima. 



Stegosaurus afRnis Marsh 



Stegosaurus affinis Marsh, Principal Characters of American Jurassic 

 Dinosaurs. Pt. lY. Spinal Cord, Pelvis, and Limbs of Stegosaurus. 

 Amer. Journ. Sci., 3rd ser., vol. xxi, p. 167 (169), 1881. 



Locality not given. Parts of the skeleton are known. 



Stegosaurus stenops Marsh 



Stegosaurus stenops 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 (414), 1887. 



Probably from the middle beds of the Morrison formation near CaiQ.on 

 City, Colorado. Practically the complete skeleton is known. 



