THE SCAPULA 



75 



^e, the tubercle of the spine (Tuber spinse), to which the trapezius muscle 



ttached. The supraspinous fossa (Fossa supraspinata) is situated in front of 



spine, and the infraspinous fossa (Fossa infraspinata) behind it. The former 



tnuch the smaller of the two; it is smooth and is occupied by the supraspinatus 



iscle. The infraspinous fossa lodges the infraspinatus muscle; it is wide and 



.looth in its upper part, narrower below, where it is marked by several rough lines 



for the attachment of the teres minor muscle; near the neck is the nutrient foramen, 



and a little lower is a vascular groove. 



The costal surface or venter (Facies costalis) is hollowed in its length by the 



fia ft ilaq e 



Cervical angle 



Supraspinous fossa 



Anterior border 



Tubercle of spin 



Dorsal angle 



Infraspinous fossa 

 Vascular groove 



Posterior border 



Nutrient foramen 

 Vascular groove 



Tuberosity 



Glenoid cavity 

 Fig. 41. — Left Scapul.\ of Horse, External View. (After Schmaltz, Atlas d. Anat. d. Pferdes.) 



subscapular fossa( Fossa subscapularis) ; this occupies nearly the whole of the lower 

 part of the surface, but is pointed above and separates two rough triangular areas 

 (Facies serrata), to which the serratus magnus is attached. In the lower third 

 there is a vascular furrow with several branches. 



The anterior or cervical border (Margo cranialis) is convex and rough above, 

 concave and smooth below. 



The posterior or dorsal border (Margo caudalis) is slightly concave. It is 

 thick and rough in its upper third, thin in its middle, and thickens again below. 



The superior or vertebral border (Margo dorsalis s. basis) carries the scapular 

 cartilage (Cartilago scapulae). In the young subject the edge of the bone is thick, 



