5iS 



C HO R DATA. 



by a great and equal reduction of the second and fifth 

 digits, leaving the third and fourth of equal size. Meta- 

 carpals three and four fuse together to form the so-called 

 " cannon-bone,'' which still, however, bears distally the two 

 functional digits (three and four) and two small vestigial 

 digits (two and five). The former carry the two paired 



I'^ig- 358.— The Left Pes 

 OF AN Ox X \. 



i^Ad nat.) 



Astragalus. 



Naviculo- 

 cuboid. 



Cuneiform. __. 



Fig- 359. — Right Pes of Horse 



[Equus Cabalhis x ^). 



{Ad nat.) 



Calcaneum. 1 



--.Calcaneum. 



Cuboid 



CEl 



__ Astragalus, 



. Naviculo- 

 Cuneiform. 



Cannon bone 



(Metatarsals 



3 and 4). 



Digit 3. 



;l- 



3rd Metatarsal. 



Phal, 



anx I — 



hoofs, which appear superficially like a "cloven" hoof, and 

 the latter also bear small hoofs or horny nodules. In the 

 horse the same derivation from the pentadactyle type can be 

 traced, but the weight is borne predominantly on the third 

 digit. Thus the first and fifth disappear altogether, the 



