150 THE WHITE RIVER BADLANDS 



Megacerops tichoceras Scott and Osborn. Mus. Comp. Zool., 



Bull., vol. 13, 1887, pp. 159-160, (Menodus). So. Dak. 

 Megacerops robustus (Marsh). Am. Jour. Sci., vol. 34, 



1887, pp. 326-327, (Brontops). Nw. Neb. 

 Megacerops brachycephalus Osborn. Am. Mus. Nat. Hist., 



Bull., vol. 16, 1902, pp. 97-98. So. Dak.? 

 Megacerops bicornutus Osborn. Am. Mus. Nat. Hist., Bull., 



vol. 16, 1902, p. 99. So. Dak.? 

 Megacerops marshi Osborn. Am. Mus. Nat. Hist., Bull., vol. 



16, 1902, pp. 100-101. So. Dak.? 

 Allops serotinus Marsh. Am. Jour. Sci., vol. 34, 1887, p. 



331. So. Dak. 

 Allops crassicornis Marsh. Am. Jour. Sci., vol. 42, 1891, 



pp. 268-269. So. Dak. 

 Allops amplus (Marsh). Am. Jour. Sci., vol. 39, 1890, pp. 



523-524, (Diploclonus). So. Dak. 

 Symborodon montanus (Marsh). Am. Jour. Sci., vol. 9, 



1875, p. 246, (Anisacodon). Nw. Neb. 

 Symborodon copei Osborn, Am. Mus. Nat. Hist., vol. 24, 



1908, pp. 616-617. So. Dak. 

 Brontotherium ramosum (Osborn). 

 Brontotherium dolichoceras (Scott and Osborn). Mus. Comp. 



Zool., Bull., vol. 13, 1887, pp. 160-161, (Menodus). So. 



Dak. 

 Brontotherium leidyi Osborn. Am. Mus. Nat. Hist., Bull., 



vol. 16, 1902, pp. 105-106. So. Dak. 

 Brontotherium hatcheri Osborn. Am. Mus. Nat. Hist., Bull., 



vol. 24, 1908, pp. 615-616. So. Dak. 



Artiodactyla. 



Elotheridae ( Entelodontidae ) . 



Elotherium (Entelodon) crassum Marsh. Am. Jour. Sci., 

 vol. 5, 1873, pp. 487-488. 

 Anthracotheridae. 



Hyopotamus (Ancodon) americanus Leidy. Acad. Nat. Sci., 

 Phila., Proc, vol. 8, 1856, p. 59. So. Dak. 

 Oreodontidae (Agriochoeridae). 



Oreodon (Merycoidodon) hybridus Leidy. Ext. Mam. of 



Dak. and Neb., 1869, pp. 105-106. Mauv. Terres. 

 Oreodon (Merycoidodon) af finis Leidy. Ext. Mam. of Dak. 



and Neb., 1869, p. 105. Mauv. Terres. 

 Oreodon (Merycoidodon) bullatus Leidy. Ext. Mam. of Dak. 

 and Neb., 1869, p. 106. Mauv. Terres. 

 Hypertragulidae. 



Heteromeryx dispar Matthew. 



MIDDLE OLIGOCENE (OREODON ZONE.) 



Carnivora (Creodonta). 

 Hyaenodontidae. 



Hyaenodon horridus Leidy. Acad. Nat. Sci., Phila., Proc, 



vol. 6, 1853, pp. 392-393. Mauv. Terres. 

 Hyaenodon cruentus Leidy. Acad. Nat. Sci., Phila., Proc, 



vol. 6, 1853, p. 393. Mauv. Terres. 

 Hyaenodon crucians Leidy. Acad. Nat. Sci., Phila., Proc. 



vol. 6, 1853, p. 393. Mauv. Terres. 

 Hyaenodon paucidens Osborn and Wortman. Am. Mus. Nat 



Hist., Bull., vol. 6, 1894, pp. 223-224. So. Dak. 



