Prof. 0. C. Marsh — Gigantic Ceratopsidce. 243 



Fig. 4.— Pelvis of Trieeratops flalelUtus, Marsh, side view, one-twelfth nat. size. 



a. acetabulum ; il. ilium ; is. ischium ; p. pubis. 

 Fig. 5. — Pubis of Trieeratops prorms, Marsh, side view, one-eighth nat. size. 

 J!iG. 6.— the same pubis; top view. Fig. 7.— The same, side view. 



a. proximal end ; b. face of ilium ; c. pubic process ; d. distal end. 



