MOOE, STUDY OF THE MORRISON FORMATION 147 



Dryosaurus altus Marsh 



Laosaurus altus Marsh, Principal Characters of American Jurassic 

 Dinosaurs. Pt. I. Amer. Journ. Sci., 3rd ser., vol. xvi, p. 411 (415), 

 1878. 



Dryosaurus altus Marsh, The Typical Ornithopoda of the American 

 Jurassic. Amer. Journ. Sci., 3rd ser., vol. xlviii, p. 85 (86), 1894. 



From the Morrison formation in Colorado and Wyoming. Character- 

 istic portions of the skeleton are known. 



Macelognathus yagans Marsh 



Macelognathus vagans Marsh, A New Order of Extinct Jurassic Rep- 

 tiles (Macelognatha) . Amer. Journ. Sci., 3rd ser., vol. xxvii, p. 341, 

 1884. 



Morrison beds of Wyoming, probably from Como Bluff. Known from 

 fragmentary remains only. The position of this form is unknown. 

 Marsh placed it among the turtles and Hay provisionally placed it among 

 the dinosaurs. 



•Apatodon mirus Marsh 



Apatodon mirus Marsh, Notice of Some New Vertebrate Fossils. 

 Amer. Journ. Sci., 3rd ser., vol. xiv, p. 249 (355), 1877. 



Lower Cretaceous or Jurassic, according to Marsh, no locality being 

 given. Fragmentary remains only are known. The form is probably a 

 dinosaur. 



Camptosanrus depressus Gilmore 



Camptosaurus depressus Gilmore, Osteology of the Jurassic Reptile 

 Camptosaurus, with a Revision of the Species of the Genus, and Descrip- 

 tions of Two New Species. U. S. Nat. Mus., Proc, vol. xxxvi, p. 197 

 (292), 1909. 



The type specimen of this species was discovered in the Lakota beds 

 near Buffalo Gap, South Dakota. A specimen has been found in the 

 Morrison formation near Como, Wyoming, which probably belongs to this 

 species. Known from the posterior portion of the skeleton. 



Camptosaurus browni Gilmore 



Camptosaurus hrowni Gilmore, Osteology of the Jurassic Reptile 

 Camptosaurus, with a Revision of the Species of the Genus, and Descrip- 

 tions of Two New Species. U. S. Nat. Mus., Proc, vol. xxxvi, p. 197 

 (295), 1909. 



From the Morrison formation 8 miles east of Como, Wyoming. Known 

 from a considerable portion of the skeleton. 



