ILLUSTRATIONS 



Restoration of Protoceratops Frontispiece 



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 Skeleton of Monoclomus (Centrosaurus) flcxits, at Yale Peabody Museum 141 



Restoration of Monoclomus (Centrosaurus) flexus, at Yale Peabody Museum. 



Anterior view of Monoclonius (Centrosaurus) flexus restoration 143 



Skin impression of Monoclomus (Centrosaurus) eutleri. 



Skeleton of Protoceratops, ventral view 145 



Skeleton of Protoceratops, lateral view. 



Skull of Chasmosaurus kaiseni, lateral view 147 



Skull of Pentaceratops stembergii, lateral view. 



VI. A. Skull of Chasmosaurus belli, lateral view 149 



B. Skull of Chasmosaurus belli, dorsal view. 



VII. A. Skull of Chasmosaurus brevirostris, lateral view 151 



B. Skull of Chasmosaurus cf. kaiseni, lateral view, at the University of Alberta. 



VIII. A. Skull of Styracosaurus albcrtensis, lateral view 153 



B. Skull of Styracosaurus albertensis, dorsal view. 



IX. A. Skeleton of Monoclomus (Centrosaurus) nasicornus, lateral view 155 



B. Mounted skeleton of Brachyceratops montanensis, lateral view. 



X. A. Skull of Anchiceratops longirostris, lateral view 157 



B. Skull of Anchiceratops longirostris, dorsal view. 



C. Skeleton of Anchiceratops longirostris, lateral view, at the National Museum of Canada. 



XI. A. Brain cast of Anchiceratops ornatus, dorsal view 159 



B. Brain cast of Anchiceratops ornatus, lateral view. 



C. Brain cast of Anchiceratops ornatus, ventral view. 



XII. A. Skull of Arrhinoceratops brachyops, oblique anterior view 161 



B. Skull of Arrhinoceratops brachyops, lateral view. 



XIII. A. Skull of Triceratops horridus, at Field Museum of Natural History 163 

 B. Skull of Triceratops horridus, at South Dakota State School of Mines. 



XIV. A. Mounted skeleton of Triceratops cf. elatus, at American Museum of Natural History 165 

 B. Mounted skeletons of Chasmosaurus belli, at the National Museum of Canada. 



XV. A. Skull of Torosaurus latus, lateral view 167 



B. Skull of Torosaurus latus, anterior view. 



XVI. A. Skull of Torosaurus gladius, lateral view 169 



B. Skull of Torosaurus gladius, oblique anterior view. 



XVII. A. Restoration of Chasmosaurus belli, left aspect 171 



B. Restoration of Chasmosaurus belli, anterior view. 



C. Restoration of Chasmosaurus belli, right aspect, at the National Museum of Canada. 



