THE SCAPULA. 



89 



fossa, much the larger, presents in the middle a convexity corresponding to the 

 concavity of the venter, and outside this a concavity bounded by the prominent 

 axillary border. It is marked near the inner border by short lines, corresponding to 

 tendinous septa of the infraspinatus muscle, and is occupied by that muscle in the 

 greater part of its extent. Adjacent to the axillary border, in its middle third, is 

 a narrow area giving attachment to the teres minor muscle ; and below this, extend- 

 ing over the inferior angle, is a raised oval surface, from which the teres major arises. 



CLAVICULAR FACET 



CLENOID FOSS 



LONG HEAD 

 Or TRICEPS 



INF. ANCLE 



Fig. 88. EIGHT SCAPULA, FROM BEFORE. (Drawn by T. W. P. Lawrence. } f 



These spaces are separated from each other, and from that of the infraspinatus 

 muscle, by lines which give attachment to aponeurotic septa. 



The spine of the scapula is a massive triangular plate of bone projecting back- 

 wards and upwards from the dorsum. Beginning internally near the upper fourth 

 of the vertebral border, it extends outwards and a little upwards to the middle of 

 the neck of the scapula ; and becoming gradually elevated towards its outer extremity, 

 it turns forwards and is continued into the acromion process. The upper and lower 

 surfaces, smooth and concave, form part respectively of the supra- and infraspinous 

 fossae. It has two unattached borders, the more prominent of which is sub- 

 cutaneous, and arises from the vertebral border of the bone by a smooth, flat, 

 triangular surface, over which the tendon of the inferior part of the trapszius 



