1 





■ 



1 



^^^^^H ^^^1 



■ 





^H 



1 



Fffll 



1 







•^^B 



^^^^H ■ ^^l^^^^^^^^^^^^^^l 







Kw 



K 



^^fe^ ^^^1 



After Osborn 



FIG. 21. EVOLUTION OF THE HIND FOOT OF THE HORSE 



Side views of six stages, Eohippus, Mesohippus, Miohippus, Merychippus, Hipparion, 

 Eqiius 



31 



