152 



THE MYOLOGY OF THE RAVEN. 



Fig. 42. — Anterior aspect of the hones oF the left hcand of a Raven, with thi; 



pollex digit removed ; designed to show the origin and insertion of 



some of the muscles or their tendons. 

 Fig. 43. — Uhiar aspect of the same bones; the axis of the exten^oi- proprius poIUcis 



muscle is shown, and its origin indicated upon a piece of the extensor 



mctacarpi rcflialis lonr/ior, given above. 

 Fig. 44. — Posterior aspect of the same bones. The several segments in all the 



figures are slightly dislodged in order to show them to better advantage. 



Siiecimens all life-size, and drawn by the author. 



The action of this musch? is to flex the hand upon the 

 forearm, and at the same time rotate it slightly to the 

 inner side. 



