A late tertiary landscape. The following animals are shown in the illustration: 1. Oreodont (Promerycochoerus) 2. Camel (Stenomylus) 3. Bear Dog (Daphaenodon) 4. Chalicothere (Moropus) 5. Shovel-tusk Elephant (Gomphotherium) 6. Pig (Dinohyus) 7. Saber-tooth cat (Hoplophoneus) 8. Crane (Grus) 9. Tortoise (Stylemys). The grasslands of the Midwest during the Oligocene and Miocene, 15-30 million years ago, resembled the great African savannas of today. In the illustration animals gather at a waterhole in what is now western Nebraska. Skeletons of these animals have been recovered from Agate Fossil Beds National Monument and nearby localities. Wallowing in the water are the pig-like oreodonts, Promerycochoerus. The antelope-like camel, Stenomylus, is being chased by two bear dogs, Daphaenodon. The large chalicothere, Moropus, with its horse-like head and sloth-like feet bends down a branch to browse on oak foliage. The shovel-tusk elephants, Gomphotherium, vie for a place at the drinking hole along with the "terrible pig," Dinohyus. In the tree the saber-tooth cat, Hoplophoneus, feasts on its prey while cranes, Grus, fly overhead. On the extreme right is the common tortoise, Stylemys.