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OSTEOLOGY 



glenoid cavity. Its superior surface, directed upward, backward, and lateralward, 

 is convex, rough, and gives attachment to some fibers of the Deltoideus, and in the 

 rest of its extent is subcutaneous. Its inferior surface is smooth and concave. 

 Its lateral border is thick and irregular, and presents three or four tubercles for the 

 tendinous origins of the Deltoideus. Its medial border, shorter than the lateral, 

 is concave, gives attachment to a portion of the Trapezius, and presents about 

 its center a small, oval surface for articulation with the acromial end of the clavicle. 



Articular capsule 



Coracoacromial 

 ligament 



Fio. 202. Left scapula. Costal surface. 



Its apex, which corresponds to the point of meeting of these two borders in front, 

 is thin, and has attached to it the coracoacromial ligament. 



Borders. Of the three borders of the scapula, the superior is the shortest and 

 thinnest; it is concave, and extends from the medial angle to the base of the cora- 

 coid process. At its lateral part is a deep, semicircular notch, the scapular notch, 



