FIG. 65. Outer aspect of the left pelvic limb of a Raven, showing the fourth or 

 deepest layer of muscles of the thigh and leg. The under side of the 

 obturator intcrnus may be seen through the " obturator space," and its 

 tendon surrounded by the gemellus attached to the trochanter of the 

 femur. The tibia has been rotated in order to bring its posterior 

 surface into view, and show the muscles there found; the "tibial 

 cartilage " is seen at its distal extremity. Life-size, by the author, from 

 his own dissections. 



