SOUTH DAKOTA SCHOOL OF MINES 



103 



the extent and importance of its collections, bnt more re- 

 cently the American Museum of Natural History has sur- 

 passed it. Gidley stated in 1907 that the latter collection 

 then contained several thousand specimens — Eocene to Plei- 

 stocene, inclusive. Granger, 1908, says that the Hyraco- 

 theres (Eocene) alone were represented by several hundred 

 specimens. Matthew and Cook, 1909, add the information 

 that in their recent work in the Pliocene of northwestern 

 Nebraska, they collected some hundreds of incomplete jaws 

 and about ten thousand separate teeth, besides great numbers 

 of limbs and foot bones. While it should be borne in mind 

 that the above collections represent to a large extent frag- 

 mentary material, Osborn states, that in all the museums of 

 the world there were in 1904 only eight complete mounted 

 skeletons of fossil horses, but that of these, five were in the 

 American Museum. 



Figure 42 — Right hind foot and left fore foot of the three-toed horse, 

 Mesohippus intermedins, front and side views. Osborn and 

 Wortman. 1895. 



