PLATE LXIV. 



Cretaceous Dinosaurs. — Predeotata. 



Ceratopsid.e. 



Page. 

 Fig. 1. Anterior cervical vertebrae of Triceratops prorsus Marsh; side view... 212 



Fig. 2. Fourth cervical vertebra of same series; back view 212 



a, anterior face of atlas ; d, diapophyeis ; n, neural canal ; p, posterior face 

 of fourth vertebra; r, rib; 8, neural spine of axis; «', neural spine of 

 third vertebra; s", neural spine of fourth vertebra ; z', posterior zygapo- 

 physis. 



Fig. 3. Anterior dorsal vertebra of same species; side view 212 



Fig. 4. The same vertebra ; front view 212 



Fig. 5. First caudal vertebra of Triceratops prorsus; side view 212 



Fig. G. The same vertebra; front view 212 



Fig. 7. The same; back view 212 



Fig. 8. Median caudal of same species; side view 212 



Fig. 9. The same vertebra ; front view 212 



Fig. 10. The same ; back view 212 



Fig. 11. Distal caudal of same species; side view 212 



Fig. 12. More distal caudal of same species ; side view 212 



a, anterior face of centrum ; c, face for chevron ; h, facet for head of rib ; n, 

 neural canal ; p, posterior face of centrum ; r, rib ; s, neural spine ; t, facet 

 for tubercle of rib ; z, anterior zygapophysis ; 2, posterior zygapophysis. 

 All the figures are one-eighth natural size. 

 372 



