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PROCEEDINGIS OF THE XATIOXAL MUSEUM. 



VOL. 54. 



conformity with the evidence furnished by several skulls of this 

 animal now in the collections. Finally, the digits are represented 

 as being terminated by flattened hoof-like nails rather than by elon- 

 gated slightly curved claws as shown in plate 62. 



The above corrections incorporated in this latest restoration (pi. 

 63 ) effect a considerable change in the proportions and general aspect 

 of this reptile, and were only made possible by the discovery of 

 better preserved specimens and the study of considerably greater 

 number of individuals than were available at the time Knight made 

 his restoration of this animal. It is to be expected that future dis- 

 coveries will bring about still further modifications in our present 

 conception of the life appearance of Stegosaur-us. 



List of hones used in the mounted skeleton of Stegosaurus stenops. 



U. S. N. M. 



No. 8612, 



Bones used. 



Catalogue 

 numbers 

 U.S.N.M. 



Skull 



Ri^ht dentary 



Atlas 



*Axis 



♦Tenth cervical vertebra 



♦First dorsal vertebra 



Second dorsal vertebra 



*Third dorsal vertebra 



Fourth dorsal vertebra 



Sixth dorsal vertebra 



Seventh dorsal vertebra 



Eighth dorsal vertebra 



Ninth dorsal vertebra 



♦Eleventh dorsal vertebra 



Twelfth dorsal vertebra 



Thirteenth dorsal vertebra 



Sacral vertebrae 



Fifth caudal vertebra 



Sixth caudal vertebra 



■ Seventh caudal vertebra 



Eighth caudal vertebra 



Ninth caudal vertebra 



Tenth caudal vertebra 



Eleventh caudal vertebra 



Twelfth caudal vertebra 



Thirteenth caudal vertebra 



Fourteenth caudal vertebra 



Fifteenth caudal vertebra 



Sixteenth caudal vertebra 



Seventeenth caudal vertebra 



Eighteenth caudal vertebra 



Nineteenth caudal vertebra 



Tvrentieth caudal vertebra 



Twenty-first caudal vertebra 



Twenty-second caudal vertebra., 

 Twenty-third caudal vertebra.. . 

 Twenty-fourth caudal vertebra. . 



Twenty-fifth caudal vertebra 



Twenty-sixth caudal vertebra. . . 

 Twenty-seventh caudal vertebra 

 Twenty-eighth caudal vertebra . . 

 Twenty-ninth caudal vertebra. .. 



Thirtieth caudal vertebra , 



Thirty-first caudal vertebra 



Thirty-second caudal vertebra. . , 



Thirty-third caudal vertebra 



Thirty-fourth caudal vertebra. . . 



Tiiirty-fifth caudal vertebra 



Thirty-sixth caudal vertebra 



Thirty-seventh caudal vertebra. 

 Thirty-eighth caudal vertebra... 



Thirty-ninth caudal vertebra 



Fortieth caudal vertebra 



Forty-first caudal vertebra 



4935 

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