244 



I*rof. 0. C. Marsh — Gigantic Ceratopsidce-. 



the acetabulum forms a broad, horizontal plate, which is continued 

 backward over the acetabulum, and narrowed in the elongated, 

 posterior extension. Seen from above, the ilium, as a whole, 

 appears as a nearly horizontal, sigmoid, plate. From the outside, 

 as shown in the diagram, the edge of this broad plate is seen. 

 8 9 



Ftg. 8— Left femur of Triceratops prorsns, Marsli (front view). 

 Fig. 9. — Left tibia of same species (front view). 

 Fig. 10. — The same tibia; distal end ; (back view). 



a, astragalus ; c, inner condyle ; c' cnemial crest ; /, face for fibula ; 

 h, head ; t, great trochanter. Figs. 8—10 all one-eighth nat. size. 



