THE MUSCLES OF THE UPPER EXTREMITY. 



107 



liumeriis ; the posterior and longer from the chivicular 

 extremity of the coracoid bone. In the Ostrich and Rhea, 

 however, both portions arise from the coracoid. The 



SuhcjLa^y-us Xm' 





S vi-6 sC'Cif' t-i-ict^' ViS 





Fig. 35. — Left oblique view of the body of a Raven, dissected to sliow the deep 

 muscles about the shoulder-joint. The coraco-brachialis has been 

 pulled out by a hook and chain, and the scapula has been rotated out- 

 wards to sliow the muscles beneath. Other parts have also been placed 

 in a favourable position to expose the muscles to be shown ; somewhat 

 diagrammatic. Reduced one-third, from dissections by the author. 



posterior muscle sends down a long and thin tendon 

 which runs parallel with the humerus, and is inserted, 

 generally by a bifurcate extremity, into both radius and 



