PLATE V. 



COMPARATIVE VIEWS OF SUPRAORBITAL HORN CORES. 



(See p. 32.) 



Plate prepared under the direction of Lull. 



Fig. 1. Monoclonius crassus. No. 3997, American Museum of Natural History. 

 Fig. 2. Type of Oeratops montanus Marsh. No. 2411, U. S. National Museum, oblique back view. 

 Fig. 3. Type of Ceratops {Monoclonius) canadensis Lambe. No. 1254, Canadian Geological Survey. Modi- 

 fied from Lambe. 

 Fig. 4. Type of Ceratops {Monoclonius) recurvicornis Cope. No. 3999, American Museum of Natural History. 

 Modified from Cope. 

 Type of Triceraiops prorsus Marsh. No. 1822, Yale Museum. After Marsh. 

 Triceraiops prorsus? Marsh. No. 2100, U. S. National Museum. 

 Type of Triceraiops bremcomus Hatcher. No. 1834, Yale Museum. 

 Type of Triceraiops calicornis Marsh. No. 4928, U. S. National Museum. 

 Type of Triceraiops {Sterrholophus) fabellatus Marsh. No. 1821, Yale Museum. After Marsh. 

 Type of Diceratops hatched Lull. No. 2412, U. S. National Museum. 



The figures, except fig. 2, are all viewed from the left side and are all one-eighth natural size. 



208 



