THE MUSCLES OF THE UPPER EXTREMITY. 



107 



liumerus ; the posterior and longer from the clavicular 

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

 however, both portions arise from the coracoid. The 



FIG. 35. Left oblique view of the body of a Raven, dissected to show the deep 

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

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

 wards to show 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 



