112 



THE SKELETON 



scapula. The second facet is broader, and gives attachment to the teres major 

 muscle. In bones from a muscular subject the third facet, quite at the inferior 

 angle, is for a few fibres of the latissimus dorsi. 



The spine commences at the posterior border of the scapula by a broad trian- 

 gular surface; it then crosses the dorsal surface obliquely to the glenoid fossa, 

 becoming more prominent as it passes outwards till it reaches the neck of the 

 scapula; from this point it forms the overhanging acromion process. The spine 

 presents a superior surface which gives origin to the siipra-spinatus muscle, and an 

 inferior surface which affords origin to the infraspinatus muscle. It has a promi- 

 nent crest, Avhich is continuous posteriorly with the vertebral border, and, at its 



Fig. 120. — The Left Scapula. (Dorsal surface.) 



Omo-hyoid and the transverse ligament 



Coraco-acromial Peetoralis 

 ligament minor 



SUPERIOR AMGLE 



AXILLARY BOEDER 



Teres major 



Rhomboideus 

 major 



VERTEBRAL 

 BORDER 



INFERIOR ANGLE 



Latissimus dorei 



commencement, is smooth for a bursa between it and the trapezius. The crest is 

 subcutaneous, and presents two lips — a superior for the insertion of the trapezius, 

 and an inferior li]i for the origin of the deltoid. The crest is continued into the 

 acromion process. 



The acromion process forms the summit of the shoulder, and presents two 

 surfaces, two borders, and a tip. The up])er surface affords origin at its posterior 

 part to a portion of the deltoid. The under surface is concave and smooth. Its 

 inner border, a continuation of the superior lip of the crest, receives the trapezius, 

 and presents near the tip a small articular facet for the outer end of the clavicle; 

 the edges of the facet are rougli for tlie acromio-clavicular ligaments. The outer 



