ILLUSTRATIONS 



Figuee 1. The first fossil discovered in the White River Badlands. 



" 2. The earliest Badland fossil described by Joseph Leidy. 



" 3. The White River Badland formations as exposed in South 



Dakota, Northwestern Nebraska and Eastern Wyoming. 



" 4. The Agate Spring fossil quarries. 



" 5. Paleogeography of North America during Pierre deposition. 



" 6. North America in the Tertiary period. 



" 7. The Cretaceous, Tertiary, and Pleistocene formations of the 



western states. 



" 8. The Tertiary formations of the Rocky Mountain Region. 



" 9. Birds-eye view of the Big Badlands. 



" 10. Section from Round Top to Adelia (Nebraska). 



" 11. Section along the Nebraska-Wyoming line. 



" 12. Section from Hat Creek to Wind Springs. 



" 13. Section from Porcupine Butte toward White River. 



" 14. Section showing the conjectural Daemonelix series. 



" 15. Steneofiber barbouri in daemonelix rhizome. 



" 16. Land areas of the world during Late Cretaceous and Basal 



Eocene time. 



" 17. Land areas of the world during Oligocene time. 



" 18. Land areas of the world during Miocene time. 



" 19. Land areas of the world during Pliocene time. 



" 20. Group of Promerycochoerus skeletons as found. 



" 21. Fine group of ancestral camels as found in the Carnegie 



Museum Stenomylus quarry. 



" 22. Skeleton of Hyaenodon cruentus. 



" 23. Hind foot and fore foot of Daphoenodon superbus. 



" 24. Skull of Daphoenodon superbus. 



" 25. Skeleton of Daphoenodon superbus. 



" 26. Skull of Cynodictis gregarius. 



" 27. Skeleton of Cynodictis gregarius. 



" 28. Skull of Dinictis squalidens. 



" 29. Heads of Dinictis squalidens and Hoplophoneus primaevus 



showing manner of attack. 



" 30. Fore foot and hind foot of Hoplophoneus primaevus. 



" 31. Skeleton of Hoplophoneus primaevus. 



" 32. Skeleton of Dinictis squalidens. 



" 33. Skeleton of Steneofiber fossor. 



" 34. Skull of Metamynodon planifrons. 



" 35. Skull of Gaenopus tridactylus. 



" 36. Skeleton of Hyracodon nebrascensis. 



" 37. Skeleton of Metamynodon planifrons. 



" 38. Skeleton of Gaenopus tridactylus. 



" 39. Skeleton of Moropus cooki. 



" 40. Skeleton of Mesohippus bairdi. 



