88 



Fig. II. 



EQUINE ANATOMY. 

 COMMON INTEROSSEOUS OF METACARPUS. 



Given off at inner side of, and descends be- 

 hind, the carpus to the head of internal meta- 

 carpal, then passes outward, anastomosing with 

 a descending branch from arch above between 

 ulnar and common arteries, forming the sub- 

 cai'pal arch. That above is the supra-carpal 

 \ arcli. 



\ Branches. 



Tivo posterior intei'osseous, arising at heads of 

 metacarpus, pass downward, ending at the 

 lower ends of metacarpus, anastomosing with 

 the collateral of the cannon, and giving off 

 branches to the suspensory ligament, skin and 

 tendons. 



7\vo anterior interosseous, arising with pre- 

 ceding, curve around heads of bones, become 

 anterior, pass downward, anastomose with 

 artery of cannon, and sead branches to ten- 

 dons and skin. 



COLLATERAL ARTERY OF CANN(1N. 



Passes under carpal sheath to inner side of 

 flexor tendons, with internal plantar nerve, to 

 top of great sesamoid bones, where it divides 

 into the digital ai^teries. 



OLA 



Fig. II — Arteries of the fore-foot, seen from behind. 



The muscles and tendons have been removed, only a small portion 

 of the perforans tendon being left; the os pedis has been 

 chiseled away on its plantar face to expose the semilunar 

 anastomosis. 



I, Posterior radial artery; 2, Innominate carpal branch; 3, Supra- 

 carpal arch; 4, Epicondyloid (ulnar artery; 5, Radio-palmar 

 artery, or common trunk of the interosseous metacarpal arte- 

 ries; 6, Sub-carpal arch; 7, 7, Posterior interosseous meta- 

 carpal arteries; 7', 7', Anterior interosseous metacarpal arte- 

 ries; 8, 8, Their origin; 9, Collateral artery of the cannon; 10, 

 Its communicating branch with the interosseoiis arteries; 11, 

 II, Digital arteries; 12, Semilunar anastomosis in the os pedis; 

 13, Emergent branches of this anastomosis; 14, Plantar ungueal 

 artery, lorming this anastomotic arch; 15, Origin of the pre- 

 plantar ungueal artery; 16, Origin of the plantar-cushion artery; 

 17, Origin of the anterior branch of the coronary circle; 18, 

 Posterior branch of the same. 



