SOCFKTY OF THE UNIVERSITY OF ABERDEEN. 147 



glutens medius in this chimpanzee. Its insertion is just behind the 

 posterior edge of the tendon of the glutens medius, and a bursa lies 

 between the two. 



Obturator intermix. 



A well-developed muscle with the two gemelli, one on each side. 

 Its tendon was united to that of the obturator externus at its inser- 

 tion. Of the two gemelli the inferior is slightly the larger. 



Glut mei- 



nnraiii 



Great suadc new 



FIG. 2. 

 Quadratus femoris. 



The two insertions of this muscle are peculiar, as in Hepburn's 

 case. One of them, the larger, is inserted horizontally and the other 

 vertically, being overlapped by the adductor brevis. 



Biceps. 



Has two heads. The femoral or short head joins the ischial 

 tendon about 1 inch from its insertion. The ischial or long head 

 arose in common with the semi-tendinosus and semi-membranosus 

 muscles. At the insertion of the muscle an expansion was sent off 

 covering the outer head of the gastrocnemius. 



