118 THE BONES. 



• 



Differential Characters in the Digital Region of other Animals. 

 In the other domesticated animals, the number of complete digits is as follows : — 



Carnivora 5 



Pig 4 



Ruminants • .... 2 



A. Ox, Sheep, Goat. — These animals certainly possess four digits, but only two are perw 

 feet— the mMius and annularis — and these articulate with the inferior extremity of the principal 

 metacarpal (Fig. 71). The two others — the index and auricularis — are in a rudimentary con- 

 dition, and are represented by two small bones situated above and behind the metacarpo- 

 phalangeal articulation. 



In the Ox, Sheep, and Goat, each of the perfect digits comprises (like the single digit of the 

 Horse) three phalanges and three sesamoids. 



The first phalanx fairly represents the moiety of this phalanx in the Horse. It has no 



Fig. 77. 

 Fig. 76. y^ 



^- 



if' '' *~ 



ANTERIOR LIMB OF THE PIGi. 



FOREARM AND FOOT OF THE DOG (AN- 

 TERIOR face). 



1, First digit ; 2, second digit ; 3, third 

 digit ; 4, fourth digit ; 5, thumb ; 6, 

 7, 8, 9, first, second, third, and fourth 

 bones of the lower row of carpnl bones ; 

 10, 11, first and second bones of the 

 upper row; 12, supercarpal bone; 

 13, body of the ulna ; 14, apex of the 

 olecranon; 15, beak of the olecranon; 

 16, body of the radius. 



posterior imprints, but shows them on its inner surface for the attachment of several ligaments. 

 This internal face is plane, and the external convex ; these characters are repeated in the other 

 two phalanges. It is also remarked in all the phalangeal bones, that the external articular 

 facet of the extremities is always larger than the iuterual. Of the two sesamoids, the external 



