THE ANCESTRY OF THE HORSE 161 
his descendants have survived, while most of 
theirs have dropped by the wayside; and 
finally, by the aid of man, the horse has be- 
My 
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“ie 
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es 
i 
x 
a 
* 
‘h 
iat oe 
SS 
Te 
tA & 
; _ Fig. 33.— Skeleton of the Modern Horse and of His 
: Eocene Ancestor. 
come spread over ‘the length and breadth of 
_ the habitable globe. 
_____Now right here it may be asked, How do 
___we know that the little Hyracothere was the 
ath 
a 
