THE BRACHIAL OR AXILLARY ARTERIES. 



655 



11), and which has been already noticed as the supra-carpal or superficial palmar 

 arch, in contradistinction to the 

 infra-carpal or deep palmar 

 arch — the source of the inter- 

 osseous arteries of the meta- 

 carpus. This ramification fur- 

 nishes one or more muscular 

 arterioles that usually anas- 

 tomose with the other l)ranches 

 of the posterior radial artery ; 

 and an inferior division,^ which 

 descends in the carpal arch, 

 within the pisiform bone, to the 

 superior extremity of the meta- 

 carpus, where it inosculates 

 with the radio-palmar artery, 

 after detaching several carpal 

 ramuscules, the principal of 

 which winds round the inferior 

 border of the pisiform bone. 



2. On its course, numerous 

 and fine synovial, tendinous, 

 and cutaneous divisions. 



3. A trunk springing from 

 the terminal extremity of the 

 vessel, between the two digital 

 arteries, sometimes even from 

 one of these, w^hich is placed 

 fit the posterior face of the 

 principal metacarpal bone, 

 within the two branches of 

 the suspensory ligament, and, 

 passing upwards, soon divides 

 into two branches ; these anas- 

 tomose by inosculation with 



ARTERIES OF THE ANTERIOR FOOT 

 OF THE HORSE. 



1, Posterior radial artery; 2, 2, col- 

 lateral of the cannon ; 3, trunk 

 common to the interosseous meta- 

 carpals ; 4, ulnar artery ; 5, supra- 

 carpal nrch ; 6, descending branch 

 from the arch to form the infra- 

 carpal arch ; 7, arteriole for the 

 ergot from the trunk common to 

 the interosseous metacarpals ; 8, 

 infra-carpal arch ; 9, branch of the collateral of the cannon concurring, in this preparation, in the 

 formation of the interosseous metacarpals; 10, a dorsal interosseous metacarpal artery: 11, com- 

 municating branch of the collateral of the cannon with the interosseous metacarpals ; 12, 12, 

 digital arteries ; 13, 13, arterioles of the ergot; 14, perpendicular artery — one of its branches to 

 the circumflex artery of the coronet, has been excised on removing the lateral cartilage ; 15, 15, 

 arteries of the plantar cushion; 16, anterior part of the coronary circle; 17, posterior part of 

 ditto; 18, prejilantar ungual artery ; 19, inferior circumflex artery of the foot. 



' Analogous to the radio-ulnar artery of Man. 



