ITS ANCESTORS AND RELATIONS 



37 



we know it now. The outer toes (second and fourth) wer< s 

 reduced to rudiments of the metacarpals or metatarsals 

 entirely concealed beneath the skin, while the middle or 



Fig. 6.— Side and front view of the bones of the left fore-foot of the 

 horse. Letters as in figs. 4 and 5. (From (Jaudry.) 



third toe was greatly elongated and had its last bone or 

 ungual phalanx much expanded in breadth (fig. 6). At 

 the same time, the stability of the fore-arm and leg was 

 increased by the two bones contained in each limb in 



