Supplementary Reading 95 LIST OF ILLUSTRATIONS Page At Work on a Dinosaur Skeleton 2 Fossil Bones in Rock Formation 7 Insect Fossils 10 Restoration of Rhinoceros 12 Dinosaur Tracks 17 Time Chart 22 Geological Section Showing Positions of Formations 26 Marine Beds of the Benton Formation 28 Plesiosaur Bones in Place 28 Invertebrate Fossils 34 Modernized Fishes 38 Prehistoric Plants 41 Marine Reptiles 46 Diplodocus 49 Trachodon 51 Stegosaur 52 Sea Turtle 54 Murals, Hall of Mammals 63 Uintatheres and Contemporary Life 65 Moropus 67 Titanotheres 69 Oligocene Mammals 71 Pleistocene Horse 73 Structure of Molar Teeth 75 Grazing Type of Molar Teeth 77 American Mastodon 79 Long-Jawed Mastodont 81 Molar Tooth of Mammoth 83 Nebraska Mammoth 85 Rancho La Brea Fossils 87 Folsom Bison 90 Man and Mammoth 92 FOSSILS INTRODUCTION