EVOLUTION OF THE HORSE 



Hypohippiis small ruiliments still remain i-epresenting the first 

 and fifth digits, but there is no splint of the fifth, as in Mesohippus. 

 The second and fourth digits still tt.nichthe ground, though lightly. 



rrietastyle 



A 



metaconer-. 

 metaconule — .7 

 hypostyl'e' 

 hypocon& — 



mesost/le parastyh 



-^.id 



■-paracone 



■protoconule 

 ■protocone 



\,~antecrcchet 



iiHtftloith 



ftrutoloph 



FIG. 3.— UPPER MOLAR OF MODERN HORSE, SHOWING EARLY STAGES 

 OF WEAR OF THE TOOTH. CROWN VIEW. NATURAL SZE 



The feet of Parahippiis were much like thi^se of Hypohippiis, but 

 the side toes were smaller. 



10 and 1 1. Protohippus and Pliohippus. Middlh and 



