VIII TABLE OF CONTENTS. 



Family Ceratosauridae — Continued . 



Osteology of Ceratosaurus — Continued. -* page. 



Pelvis 106 



Ilium • , 107 



Pubis '. 107 



Ischium 108 



Hind limb and foot 108 



Femur : 108 



Tibia 110 



Fibula 110 



Tarsus 110 



Astragalus and calcaenum Ill 



Metatarsals 112 



Dermal armor 113 



Mounted skeleton of Ceratosaurus nasicornis Marsh 114 



Restorations of Ceratosaurus 115 



Review and revision of type and other theropod specimens 116 



Family Megalosauridae .- 116 



Dryptosaurus? potens (Lull) ' 116 



Dryptosaurus? medius (Marsh) 119 



Tyrannosaurus rex Osborn 121 



Deinodon? grandis (Marsh) 122 



Deinodon, species • 123 



Labrosaurus jerox Marsh 124 



Family Coeluridae 126 



Coelurus? gracilis Marsh = 126 



Coelurus Jragilis Marsh 127 



Coelurus agilis Marsh 128 



Family Ornithomimidae 129 



Ornithomimus sedens Marsh , 131 



Orniihomimus tenuis Marsh 135 



Ornithomimus affinis, new species 137 



Orniihomimus minutus Marsh 142 



Carnivorous Dinosaurian Cope 144 



Observations on the progressive structural modifications of the Theropod skeleton 144 



List of works cited *. . . ! 147 



Explanation of plates 149 



Index 155 



