HORSESHOEING. 



23 



Pig. 3. 



tilage. On both the external and the internal aspects of the 

 lower end of the cannon are small uneven depressions in which 

 ligaments take their 

 attachment. 



The condyles of 

 the cannon articulate 

 with the OS suffra- 

 ginis (long pastern) 

 and the two sesa- 

 moids (Figs. 3, C, and 

 4, B) in such a man- 

 ner that in the fore- 

 feet the cannon 

 makes an angle with C' 

 the long pastern of 

 from one hundred 

 and thirty to one hun- 

 dred and forty de- 

 grees, and in the hind 

 feet of from one hun- 

 dred and forty to one 

 hundred and fifty 

 degrees. 



The long pastern 

 (first phalanx) (Fig. 

 4, A) is about one-third the length of the cannon ; its upper and 

 thicker end presents two condyloid cavities (a) (glenoid cavities), 

 separated by a median groove, which exactly fit the condyles 

 and ridge at the lower end of the cannon. The lower end of 

 the long pastern is smaller than the upper, and is provided with 

 two condyles, between which is a shallow groove (e). The an- 

 terior face of the bone is smooth, rounded from side to side, 

 and blends into the lateral borders. The posterior face is flatter, 

 and shows a clearly marked triangle to which ligaments attach. 



The two sesamoid bones (Fig. 4, B) are small, and somewhat 



