THE SKELETON OF THE UPPER EXTREMITY 



111 



Centre of ossification for 

 the coracoid process 



Centre of ossification for the 

 uppermost portion of thi; 

 glenoid fossa (Subeoracoia 

 bone) 



Cartilaginous acromion 



Primary osseous 

 portion of the scapula 



Rudimentary; 

 cartilage 



FIG. 241. IN THE FIFTH 

 MONTH OF INTRA-UTERINE 

 LIFE (MONTHS OF FOUR 

 WEEKS EACH). 



FIG. 242. IN THE SECOND 

 YEAR OF LIFE. 



Secondary epiphysis at the 

 tip of the coracoid process s. 



Subcoracoid bone 

 Os infracoracoideum 



Osseous portions 

 of the acromion 



Epiphysis of the lower 



portion of the' glenoid 



fossa 



Cartilage at the inferior / 

 angle and along the < 

 vertebral border 



FIG, 244. IN THE SEVENTEENTH YEAR 

 OF LIFE. 



Gait laginous acromion 



FIG. 243. IN THE FIFTEENTH 

 YEAR OF LIFE. 



Acromial epiphysis 



Secondary epiphysis on the base 

 of the coracoid process 



Epiphysis at the 

 inferior angle 



FIG. 245. IN THE NINETEENTH YEAR 

 OF LIFE. 



Development of the Scapula. 



