PLATE III. 



COMPARATIVE VIEWS OF SQUAMOSAL BONES. 



(See p. 20.) 

 Plate prepared under the direction of Lull. 



Fig. 1. Ceratops monlanus? Marsh. No. 4802, U. S. National Museum. After Marsh. 



a, Dorsal aspect; b, end view; c, ventral aspect. 

 Fig. 2. Ceratops sp. (young). No. 2415, U. S. National Museum. After Marsh. 



a, Dorsal aspect; b, end view; c, ventral aspect. 

 Fig. 3. Torosaurus gladius Marsh. No. 1831, Yale Museum. After Marsh. 



Ventral aspect. 

 Fig. 4. Triceratops jlabellatus Marsh. No. 1821, Yale Museum. After Marsh. 



Ventral aspect. 

 Fig. 5. Monodonius sp. No. 3394, American Museum of Natural History. 



a, Dorsal aspect; b, ventral aspect. 

 Fig. 6. Monodonius sp. No. 3996, American Museum of Natural History. 



a, Ventral aspect; b, dorsal aspect. 

 Fig. 7. Monodonius sp. No. 3995, American Museum of Natural History. 



a. Dorsal aspect: b, ventral aspect. 

 Fig. 8. Ceratops canadensis Lambe. No. 1254, Canadian Geological Survey. After Lambe. 



a, Ventral aspect; b, dorsal aspect. 



All one-twelfth natural size. 



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