MUSCLES OF THE THORACIC LIMBS. 



167 



larly named heads in man ; the medial portion falls into a 

 number of subdivisions whose homologues are uncertain. 



FIG. 79. DEEP MUSCLES ON THE MEDIAL SIDE OF THE HUMERUS. 

 a, M. supraspinatus; l>, M. subscapularis; c, M. coracobrachialis ; d, M. teres 

 major (a", its tendon); e, part of M. latissimus dorsi joining the teres major; /, cut 

 end of M. pectoralis minor; g, long part of caput mediale of M. triceps brachii; h, in- 

 termediate part of caput mediale of M. triceps; i, M. brachialis (i r , its tendon); /. short 

 part of caput mediale of M. triceps; k. cut end of M. clavobrachialis ; /, /', cut ends 

 of M. biceps; ;, M. brachioradialis; n, M. extensor carpi radialis longus; o, M. ex- 

 tensor carpi radialis brevis; p, fifth head of M. flexor profundus digitorum; q, first 

 head of M. flexor profundus digitorum. I, humerus; 2, olecranon; 3, medial epi- 

 condyle of humerus. 



Caput laterale (anconeus lateralis) (Fig. 75, h\ Fig. 68, /). 

 The lateral portion is a flat muscle (most of it subcutaneous) 

 on the lateral side of the brachium, connecting the proximal 

 end of the humerus with the olecranon process of the ulna. 



