10 STUDIES IN COMPAKATIVE ANATOMY. 



tuberosity of the humerus, and is inserted into the outer and 

 anterior surface of the humerus, immediately below the root of 

 the tuberosity. Some of its fibres run into the teres minor, q.v. 



C. and L. — 274-5, W- (we have found nothing exactly corre- 

 sponding to k) ; 276-7 (F) ; 283, fig. 1 (^ ?) ; 284, fig. 1 (F) ; 

 292-3 (k ?). 



Subscapularis arises from the whole internal surface of the 

 scapula, except at the angles. Serratus magnus is inserted into 

 the superior angle ; teres major arises from the inferior angle ; 

 while above the glenoid cavity is a surface unoccupied by 

 muscle, over which the suhscaioularis plays. This muscle takes 

 origin also from the suprascapular ligament. It is inserted by a 

 thin flat tendon into the internal surface of the head of the 

 humerus close to the articulation. The insertion is overlaid by 

 the coraco-hrachialis. 



C. and L.— 283, figs. 1, 2 (n) ; 284, fig. 1 {n). 



Suprasjoinatus. — A thick muscular mass, filling the supra- 

 spinous fossa, and taking origin also above from the fascia which 

 covers the muscle. Inserted into the upper border of the tuber- 

 osity of the humerus. Fleshy throughout. 



C. and L.— 276-7 ; 283, figs. 1, 2 ; 284, fig. 1 (/). 



Infraspinatus arises from the posterior surface of the spine of 

 the scapula, and from the under surface of the unciform process. 

 Its origm from the bone is defined below by a line drawn from 

 the tuberosity of the humerus to the junction of the upper and 

 middle thirds of the posterior border of the scapula. It arises 

 also from the intermuscular septum between it and teres minor, 

 and from the fascia which covers in the infraspinous fossa above 

 the level of the unciform process. The muscle converges to a 

 strong flat tendon, which is inserted into an oblique line along 

 the outer surface of the base of the tuberosity of the humerus. 

 Above this line a large and distinct bursa separates it from the 

 tuberosity. 



C. and L., 276-7 (m). 



Teres minor arises from the outer surface of the scapula along 

 the middle third of the posterior margin, and from the intermus- 

 cular septum beneath the muscle. It is inserted into the neck 

 of the humerus behind and below infraspinatus, with the lower 

 border of which some of its fibres are connected. Its tendon is 



