DINOCERATA. 



Ribs of DiNOCERAS MiRABiLE, Marsh. 



One-fourth Natural Size. Patrt 



Fig. 1. — First rib; anterior view,. 120 



Fig. 2. — The same; inner view, li'O 



Fig. 3. — The same; superior view, showing head and tubercle,. ... 129 



Fig. 4. — Dorsal rib; posterior view, _ 133 



Fig. 5. — The same; inner view, ... 133 



Fig. 6. — The same; superior view, showing head and tubercle, 133 



Fig. v. — Posterior rib ; anterior view, 133 



Fig. 8. — The same; outer view, . 133 



Fig. 9. — The same; superior view, showing head and tubercle, . _ — 133 



