MUSCLES or THII THOR/iClC 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; A, M. subscapularis; c, M. coracobrachialis; d, M. teres 

 major (</', its tendon); e, part of M. latissinius dorsi joining the teres major; y, cut 

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

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

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

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

 tensor carpi radialis brevis; /, 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. 



