THE HOESE. 



349 



phalanges are greatly inclined to the surface upon wliicli it 

 stands, while those of the metacarpals and metatarsals are 



Pig. 97. 



Pig. 97. — Longitudinal median section of the foot of a Horse. 13, 14, 

 18. The three phalanges. 16. The navicular sesamoid. 5. The 

 flexor perforatus. 6. The flexor perforans. 19. The hoof. 



perpendicidar and greatly elongated. The wi-ist of the 



Horse thus comes to occupy the middle of the length of 



its fore-leg, and constitutes what is improperly called the 



'■ knee." The heel is similarly raised to the middle of the 



hind leg, and is termed the " hock." The forearm and the 



leg are free, but their motions are almost restricted to an 



antero-posterior plane. The fore arm is fixed in the prone 



position. The arm and thigh are closely applied to the 



sides of the body and inclosed in the common integviment, 



so as to be capable of very little proper motion. At the 



same time, the axis of the humenis is inclined obliquely 



backwards and downwards, at right angles with the long axis 



