THE EOCENE PERIOD. 



255 



variations (Brontops, Titanops, Megaceratops, Diconodon. Haplacodon, 

 Symborodon, Menodus). They were American and apparently rather 

 local in distribution. 



The elotheres were large pig-like animals, constituting a temporary, 

 highly specialized side branch of the even-toed ungulates, allied to the 

 Suidce. They appeared in North America in the White River stage, 

 and continued into the John Day (Miocene) stage, and were present 





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WL f% IMS >*S. 



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Fig. 440. — An interpretation of the general appearance of the elotheres, or giant 

 pigs, of the White River epoch, drawn by Charles R. Knight under suggestions 

 from Osborn and Scott, based on a skeleton in the Princeton Museum. (From 

 drawing in American Museum of Natural History. Copyrighted by the Museum.) 



also in Europe. An interpretation of their general appearance by 

 Knight is shown in Fig. 440. 



The Protoceras was remotely related to the deer family, and was 

 profusely and strangely horned, as though in diminutive mimicry of 

 the Dinocerata. There was, in the male, a blunt pair of protuberances 

 between the ears, a pair of basal cores between the eyes, and two large 

 prominences on the nose. The skull was only eight inches long, and 

 the animal about the size of a sheep. It was North American (White 



