238 THE HORSE AND ITS RELATIVES 



have existed only in the proximate ancestors of the 

 modern members of the horse group, and that the 

 earHer progenitors were not thus marked. Indeed, 

 it has been mentioned on page 52 that there are 

 reasons for believing that the earlier members of 

 the horse -stock had a totally different type of 

 colouring. 



