206 



OSTEOLOGY 



lower third of this borderland affords origin to part of the Subscapularis. The 

 inferior third is thin and sharp, and serves for the attachment of a few fibers of 

 the Teres major behind, and of the Subscapularis in front. The vertebral border 

 is the longest of the three, and extends from the medial to the inferior angle. It 

 is arched, intermediate in thickness between the superior and the axillary borders, 

 and the portion of it above the spine forms an obtuse angle with the part below. 

 This border presents an anterior and a posterior lip, and an intermediate narrow 

 area. The anterior lip affords attachment to the Serratus anterior; the posterior 

 lip, to the Supraspinatus above the spine, the Infraspinatus below; the area 



FIG. 204. Posterior view of the thorax and shoulder girdle. (Morris.) 



between the two lips, to the Levator scapulae above the triangular surface at the 

 commencement of the spine, to the Rhomboideus minor on the edge of that surface, 

 and to the Rhomboideus major below it; this last is attached by means of a fibrous 

 arch, connected above to the lower part of the triangular surface at the base of 

 the spine, and below to the lower part of the border. 



Angles. Of the three angles, the medial, formed by the junction of the superior 

 and vertebral borders, is thin, smooth, rounded, inclined somewhat lateralward, 

 and gives attachment to a few fibers of the Levator scapulae. The inferior angle, 

 thick and rough, is formed by the union of the vertebral and axillary borders; 

 its dorsal surface affords attachment to the Teres major and frequently to a few 



