CHARACTERS AND RESTORATION OF THE SAUROPOD 

 GENUS CAMARASAURUS COPE.^ 



From Type Material in the Cope Collection in the American 

 Museum of Natural History. 



(Plate I.) 

 By henry FAIRFIELD OSBORN and CHARLES CRx\IG MOOK. 



In 1902 the Cope Collection of Fossil Reptiles was presented to 

 The American Museum of Natural History by President Morris K. 

 Jesup. It included all of Cope's types and other dinosaur material of 

 Morrison age from the vicinity of Canyon City, Colorado. Several 

 of these types antedated in definition Marsh's types from beds of 

 similar age. Cope's references were full but accompanied by few 

 figures ; Marsh's came later and were adequately illustrated. Marsh 

 also issued in the publications of the United States Geological Sur- 

 vey two more or less complete summaries of the characters of these 

 animals, which were fully illustrated and widely distributed. Conse- 

 quently they became well established in the literature, while Cope's 

 are still unrecognized and imperfectly known. Our object has been 

 to describe and determine as fully as possible Cope's types, especially 

 of the Sauropoda, the most important of which is that of Camara- 

 saurus. This generic name antedates Morosauriis Marsh, with 

 which it is considered congeneric, by about one year. 



The fugitive descriptions and determinations by Cope, Osborn, 

 Riggs and Mook may now be replaced by thorough descriptions and 

 illustrations, in which the characters of the genus Caiiiarasaitrus are 

 determined in great detail, so far as the nature of the material will 

 permit. All the type material, including the types of six genera and 

 eleven species, has been figured and these animals, practically un- 

 known since their original mention forty years ago, have now been 

 brought to light. 



^ Partly printed in the Proceedings of the Palsontological Society, Bul- 

 letin of the Geological Society of America. 



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