PLATE XI. 



RIGHT HUMERUS OF TRICERATOPS PRORSUS MARSH. 



(See p. 60.) 

 Plate prepared under the direction of Marsh. 



Specimen No. 4842, U. S. National Museum. 

 Fig. 1. Posterior view. 

 Fig. 2. External view. 



One-fourth natural size. 



220 



