A 4 



B 



FIG. 160. First layer of muscles of the breast and shoulder region. 

 After Spalteholz 



A, biceps of the arm (p. 33) ; B, deltoid; C, portion of the trapezius (see 

 Figs. 113 and 114); D, clavicle; E, sternum or breastbone; F, pecto- 

 ralis major (see p. 316 and Fig. 114) 



