THE FOOT OF THE HORSE. 



61 



A, Lower face of the 

 velvety tissue, or sensi- 

 tive sole immediately 

 overlying the horny 

 sole, which it secretes. 



B, Base, or bulbs of 

 the plantar cushion, sep- 

 arated by the depression 

 or cleft (median lacuna), 

 on the inside of which 

 the spur or stay of the 

 horny frog reaches. 



C, Return of the bars 

 to their junction with 

 the wall. 



D, Arch, or spring of 

 the bars, formed by their 

 angle of inflection at the 

 heels, also showing the 

 laminal leaves covering 

 them. 



Fig. 14. the lower pace of the horse's foot, 

 after removal of the horny hoof. 



The arteries forming the plexus or network furnishing this 

 region of the foot are similar to those shown on the other 

 plates, and like them proceed from the parent trunk, descending 

 on the side of the digit, terminating in the plantar ungual 

 branch from which the inferior communicating arteries pass 

 through the foramina just above the edge of the coffin-bone, 

 branching closely over the laminal tissue and uniting below to 

 form the large circumflex, or peripheral artery, which runs 

 around the toe. They also help to form the inferior circumflex 

 artery and finally join the coronary plexus — collectively form- 

 ing the circulatory apparatus of the entire digital region. 



