8 THE SURGICAL ANATOMY OF THE HORSE 



to the anterior and inner surfaces of the scaphoid bone. Immediately 

 below this is a faint depression which runs parallel to the elevation just 

 described. This depression is situate between the most prominent 

 portion of the anterior and inner surfaces of the scaphoid above, and the 

 anterior surface of the cuneiform magnum together with the inner 

 surface of the cuneiform parvum below. These surfaces of the cunei- 

 form bones cause another horizontal elevation, which, however, is not so 

 well-defined as the one already described, being simply a faint upheaval 

 of the surface. It differs moreover from the first-mentioned elevated 

 area, inasmuch as it is not continuous, being (interrupted by a little 

 depression which is placed between the two cuneiform bones. This 

 depression therefore is disposed vertically. 



The horizontal elevation corresponding to the two cuneiform bones 

 forms the superior boundary of a second transverse depression which is 

 not so apparent as that already described, and which is bounded inferiorly 

 by the prominent upper extremity of the large metatarsal bone and the 

 head of the inner small metatarsal bone. This depression is crossed at 

 right angles by the one which has been mentioned as running vertically, 

 and the latter is continued in the downward direction between the 

 prominences which indicate the position of the head of the inner small 

 metatarsal bone and the large metatarsal bone. 



The subjacent osseous structures to which the various elevations 

 mentioned correspond, and their disposition one to the other will be 

 easily understood by a reference to Plate XVIII. 



Running inwards and slightly downwards from the front of the joint 

 to the small cuneiform bone is a broad, flat tendon, which can be felt 

 only when a considerable amount of pressure is applied. This is the 

 cunean division of the tendon of the flexor metatarsi muscle. 



The insertion of the cunean tendon will be found to be in line with 

 a horny excrescence which is confined to the skin and which is called 

 the chestnut. 



The branch from the superficial tendon of this muscle may be felt, 



