MUSCLES OF THE THORACIC LIMBS. 169 
articular head, and its apex about one-sixth the length of the 
humerus from the head. It is between the coracobrachialis 
and the lateral head of the triceps. 
Fic. 80.—DEEP MUSCLES ON THE LATERAL SURFACE OF THE HUMERUS, 
a, part of M. supraspinatus; 4, part of M. infraspinatus; ¢, M. teres minor; @, M. 
teres major; ¢, part of M. latissimus dorsi joining M. teres major; /, long part of caput 
mediale of M. triceps brachii; g, cut insertion of M. acromiodeltoideus; h, M. brachi- 
alis; 2, M. brachioradialis; 7, intermediate part of caput mediale of M. triceps brachii; 
4, M. extensor carpi radialis longus; /, M. anconeus; m, M. extensor communis digi- 
torum. 1, great tuberosity of humerus; 2, 3, superficial radial and dorsal interos- 
seous branches, respectively, of the radial nerve. 
Insertion (Fig. 86, a).—The muscle ends in a long, slen- 
der tendon which passes through the furrow on the ventral 
