South Dakota School of Mines 



Bulletin No. 13. Plate No. 14. 



A. Head of Hyrocodon nebrascensis. An oligocene rhinoceros. Scott, 1896. 



B. Head of the White River tapir, Protapirus validus. Restored from a 

 skull in the museum of Princeton University. W. B. Scott, A His- 

 tory of Land Mammals in the Western Hemisphere, 1913. Pub- 

 lished by the Macmillan Company. Reprinted by permission. 



