FRACTURES OF THE PHALANGES. 
601 
fissures. The sudden severe lameness, associated with volar flexion 
of the fetlock, is apt to give the impression that the case is one of 
distortion, and therefore the limb should always be examined for 
Fig. 223. —Fracture of os suffraginis. Fig. 224. —Fracture of os suffraginis 
with formation of exostosis. 
fracture wherever lameness is of sudden onset and severe. When 
passive rotation of the foot produces no crepitation, the anterior surface 
of the pastern should be firmly manipulated, beginning at the centre of 
Fig. 225.—Transverse frac¬ 
ture of os suffraginis. 
Fig. 226. —Double fracture of 
upper end of os suffraginis. 
Fig. 227.-—Longitudinal frac¬ 
ture of os suffraginis. 
the upper end. Starting from here, a line of increased sensibility may 
be traced nearly corresponding to the course of the extensor tendon, and 
passing towards one or other side of the bone. In most cases the fissure 
runs towards the outer side—a fact perhaps due to the smaller size of 
the outer division of the articular surface. During this examination 
