344 ZOOTOMY. 



On the inner surface of the scapula. 



404. The teres major (te.ma\ a stout muscle arising 

 from the greater part of the glenoid border of the scapula, 

 and inserted into the shaft of the humerus near the insertion 

 of the latissimus : cut it through the middle and reflect. 

 both ends. 



405. The subscapularis (s.sc) a large flat muscle arising 

 from the whole of the subscapular fossa, and inserted into 

 the lesser tuberosity of the humerus : detach from its origin 

 and reflect. 



406. The coraco-brachialis (cr.br), a small muscle 

 covering the insertion of the subscapularis : it arises from 

 the coracoid, and is inserted into the proximal end of the 

 shaft of the humerus : cut through and reflect. 



On the outer surface of the scapula. 



407. The supra-spinatus (s.sp), arising from the whole 

 of the pre-scapuiar fossa and pre-axial surface of the spine of 

 the scapula, and inserted into the tipper margin of the 

 greater tuberosity of the humerus : detach from its origin 

 and reflect. 



408. The abductor brachii inferior (a.br.i) arising 

 from the infra spinous fascia (i.sp.f) or connective 

 tissue covering the infra-spinatus ( 409), as well as from 

 the acromion and metacromion : it passes beneath the 

 latter and is inserted into the outer face of the humerus 

 just distal to its head : detach from its origin and reflect, 

 removing with it the metacromion. 



409. The infra-spinatus (J.JT/), lies beneath the pro- 

 ceding : it arises from the whole post-scapular fossa and 

 from the post-axial surface of the spina scapulas, passes 

 beneath the acromion, and is inserted into the greater 

 tuberosity of the humerus : detach from its origin and 

 reflect. 



