M. SUBSCAPULARIS. 253 



extent and manner of connection between the muscle and the bone ; 

 then reflect the humeral end, noting its close attachment to the cap- 

 sule of the shoulder joint. 



671. Origin. By fleshy fibers from the subscapular fossa, 

 excepting : (A) the oblong area near the vertebral border which 

 gives insertion to the levator anguli scapulae and serratus magnus ; 

 (B) an irregular quadrilateral area near the glenoid angle of the 

 bone, the vertebral limit of which coincides nearly with the position 

 of a vascular foramen about 1 cm. from the lip of the glenoid fossa. 

 In addition to this general fleshy origin from the periosteum lining 

 the subscapular fossa, the muscle has at least two lines of tendinous 

 attachment along the slight ridges which converge toward the gle- 

 noid angle. 



Insertion. By a strong flat tendon upon the dorsal border of 

 the trochin of the humerus at the margin of the arthral surface. 



672. Explanation of Fig. 74. The cephalic (outer) aspect 

 of the left brae Mum and antebrachium, with the ectal muscles of 

 the scapular region. 



Preparation. After examination of the MM. serratus magnus 

 and levator anguli scapulce, the arm with the scapula was detached 

 from the trunk by the transection of those muscles. 



The spino-deltoideus and acromio-deltoideus have been tran- 

 sected and reflected. 



Bones, etc. Acromion (Fig. 44, 392). As seen in Fig. 67, the tip of this process 

 coincides with the acromial margin of the M. acromio-deltoideus ; bat the muscle is here 

 reflected so as to hide it, and the name has not been connected therewith by a dotted line. 



Capitellum radii ( 220, 410). This enlargement of the proximal end of the radius is 

 shown but not named in Fig. 30. Its position here is nearly indicated by the beginning 

 of the name. 



Epicondylus (Fig. 30, 68, 69, 71, 415). The position is nearly indicated by the first 

 letter of the name. 



Olecranon (Fig. 30, 230). This proximal process of the ulna forms the angle of the 

 elbow. 



Trocliiter (Fig. 30, 46, 68, 405). This has been exposed by the removal of the M. 

 daw-deltoideus (Fig. 66). By inadvertence it is marked ce. 



Muscles. The following have been sufficiently described in connection with the 

 figures whos3 numbers are placed in parentheses : 



Dermo-humeralis (66, 67, 72, 73), 629 ; latissimus (66, 67, 72, 73), 635 ; rhomboideus 

 (67), 620 ; supraspiruitus (67), 675 ; teres, " teres major," (67), 680. 



Acromio-deltoideus ( 676) and spino deltoideus ( 674). These two muscles have been 

 transected and reflected. The name of the former is written across the scapular end 

 of both. 



