to rli&lru 



EXTERNAL FORM. 



Ixxv 



Fig. 2. 



to dislocation of parts, although, being the farthest removed 

 from both extremities of the limb, they are at the part of it 

 most apt to be injured. 



The next bones form what is termed the fore-leg of the 

 horse, which consists of three bones, namely, the large can- 

 non-bone, or shank, with the two smaller splint-bones, as 

 they are called, behind. The splint-bones extend downwards 

 for about two-third parts of the length of the principal bone, 

 with which they are united by a ligamentous matter. This 

 matter tends to become bone, and the ossification extending 

 beyond the point of union of the bones, there is formed the 

 bony tumour so common in the horse, Splint. 



The last of the series of bones of the 

 limbs are those of the pastern and foot. 

 The uppermost of these, the upper pas- 

 tern, is jointed to the lower part of the 

 cannon-bone. Inferiorly it is jointed to 

 the lower pastern, or coronet-bone ; and 

 the coronet-bone, again, is articulated 

 with the coffin-bone, which is of a soft 

 and spongy nature, and inclosed within 

 the horny covering of the hoof. These 

 several bones of the limb are more dis- 

 tinctly represented in the accompanying 

 figure, where s is the lower part of the 

 shoulder-blade, h the humerus, work- 

 ing, by its rounded head, into the socket 

 of the scapula, / the fore-arm, e the 

 elbow, c the carpus or knee, o the can- 

 non-bone, or shank, with its splint-bones 

 behind /, p the upper pastern, q the 

 lower pastern, or coronet-bone, r the 

 coffin-bone, x the hoof. 



Besides the bones enumerated, there 

 are small bones, y, v, placed behind the 

 others, and acting somewhat in the manner of pulleys. 



