34 



HORSESHOEING. 



Fig. 16. 



tendon (Figs. 15, a, and 16, c) is cylindrical and stronger thaa 

 the perforatus tendon; above the fetlock-joint it lies between 

 the perforatus and the suspensory liga- 

 ment of the fetlock. At the sesamoid 

 bones it passes through the ring formed 

 by the perforatus tendon (Fig. 15, h'), 

 then becomes broad and double-edged, 

 passes between the two terminal 

 branches of the perforatus, glides over 

 the fibro-cartilage of the second phalanx 

 and over the inferior surface of the 

 navicular bone, and finally ends on the 

 semilunar crest of the third phalanx. 

 In common with the perforatus tendon 

 it flexes the foot. 



If at a point a few inches above the 

 fetlock a limb be cut through from be- 

 hind, the knife will pass successively 

 through the following structures: skin, 

 perforatus tendon, perforans tendon, 

 suspensory ligament, cannon bone, 

 lateral extensor tendon, anterior exten- 

 sor tendon, and, lastly, the skin on the 

 anterior surface of the limb. The flexor 

 tendons are frequently thickened and 

 shortened by inflammation due to in- 

 jury, and as a result the foot is pulled 

 backward and the hoof gradually be- 

 comes more nearly upright, — i.e., stub- 

 by, steep-toed. A knowledge of the 



Right forefoot seen from behind and a little from the external side: a, perforatus tendon; 

 b, terminal branches of the same; c, perforans tendon; d, annular ligament which attaches 

 to the sesamoid bones: d', the "x" ligament, which attaches by four branches to the oa suf- 

 fraginis;.d", an upper branch of the same (the lower branches are not shown in the figure); 

 e, reinforcing sheath of the perforans tendon, covering the under surface of the latter and 

 attached by its branches at e' to the lower end of the os suffraginis; /, suspensory ligament 

 of the fetlock. 



