SOCIETY OF THE UNIVERSITY OF ABERDEEN. 149 



Gracilis. 



This appeared to be a very powerful muscle. At its origin it 

 had a breadth of 1| inches, and at its insertion it gave oft' 

 a considerable fascial expansion to the leg, which extended much 

 lower down than the corresponding expansion in man. Hepburn 

 notes that such expansion is more fully developed in the orang and 

 gibbon than in the gorilla and chimpanzee owing to their more dis- 

 tinctively arboreal habits. 



Adductor lone/us. 



The round tendon of origin of this muscle, such as we meet with 

 in human anatomy, was not at all marked in the chimpanzee. In 

 fact, the origin was almost entirely by fleshy fibres. It was a much 

 wider muscle than the pectineus. 



Adductor brevis. 



As noted by other observers this muscle was multifasciculate 

 and three portions could be distinguished. The lower portion, which 

 was very flattened and possibly represented an adductor minimus, 

 overlapped the other two portions at their insertion. 



Adductor maynus. 



This muscle showed an extraordinary tendency to fasciculation. 

 The portion which passed to be inserted into the adductor tubercle 

 was quite distinct from the other portions. These latter were three 

 in number and may be denoted from above downwards by the letters 

 (i, l> and i: ; a and h join at a distance of 1 inch from their insertion ; 

 l>, which is the largest of the three, sends off at a distance of ^ of an 

 inch from its origin the muscular slip c, which is inserted quite inde- 

 pendently immediately below the insertion of adductor brevis. The 

 insertion of c stood highest of the three insertions on the femur, a 

 and ?> send fibres downwards as far as the popliteal space. Regarding 

 the origins of the various portions, it may be noted that the origin of 

 a lies underneath the aponeurotic origins of gracilis and adductor 



