PLATE VII. 



POSTERIOR DORSAL VERTEBRA OF TRICERATOPS PRORSUS MARSH. 



(See p. 51.) 

 Plate prepared under the direction of Marsh. 



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

 Fig. 1. Anterior view. 

 Fig. 2. Left lateral view. 

 Fig. 3. Superior view. 

 Fig. 4. Posterior view. 

 Fig. 5. Inferior view. 



One-fourth natural size. 



212 



