PLATE XL. 



VERTEBRAE OF TRICERATOPS. 



(See pp. 46, 139, 142.) 



Plate prepared under the direction of Hatcher. 



Fig. 1. Presacral vertebrae of Triceraiops brevicornus Hatcher. Type specimen, No. 1834, Yale University 



Museum. 

 Figs. 2, 3. Vertebrae of Triceratops calicornis Marsh. Type specimen, No. 4928, U. S. National Museum. 

 Fig. 2. Cervical 8 and dorsals 1-6. 

 Fig. 3. Posterior dorsal vertebras. 

 One-sixth natural size. 



278 



