652 BLOOD-VASCULAR SYSTEM OF THE HORSE 
Anterior deep 
pectoral muscle 
Suprascapular 
artery 
Posterior deep pecto- 
ral muscle 
Tendon of cutaneus 
Nerve to bice ps 
Anterior circumflex 
artery 
Anterior superficial 
pe ctoral muscle 
~ Elbow joint 
Flexor carpi 
ulnaris 
Flexor carpi 
radialis 
— Medial liga- 
ment of elbow 
joint 
Extensor carpi radialis — 
Radius 
Accessory cephalic vein 
Fic, 566.—Dissection or SHOULDER AND ARM oF Horsb; MepIaAL SuRFACE. 
A, Brachial artery, the stump of which has been turned backward; B, subscapular artery; C, thoraco-dorsal 
artery; D, deep brachial artery; Z, ulnar artery; F, anterior radial artery; G, median artery; HW, stump of brachial vein; 
I, external thoracic vein; J, brachial vein, part of which has been removed to expose deep brachial artery; K, K, Ky 
median veins; LZ, cephalic vein; ZL’, communicating vein; M, brachialis muscle; N, medial epicondyle of hu- 
merus; O, prescapular lymph glands; P, indicating position of axillary lymph glands, should be dorsal to vein; Q, posi- 
tion of cubital lymph glands; 1, suprascapular nerve; 2, subscapular nerves; 3, thoraco-dorsal nerve; 4, musculo- 
cutaneous nerve; 4’, cutaneous branch of musculo-cutaneous nerve; 5, median nerve; 6, axillary nerve; 7, ulnar nerve; 
7’, cutaneous branch of ulnar nerve; 8, radial nerve; 9, thoracic nerves. The vein at the elbow which lies in front of the 
median artery should be shown crossing over the median nerve and the median and ulnar arteries, as in the next figure. 
(After Schmaltz, Atlas d. Anat. d. Pferdes.) 
