The Gluteal and Femoral Muscles in a Marmoset. 185 



inserted into the shaft of the femur, below the small tro- 

 chanter, and behind the insertion of pectineus. 



The anterior and posterior divisions of the obturator nerve, 

 as they passed downwards on opposite sides of the muscle, 

 each gave it a branch. 



An adductor minimus was not present. 



In lemurs its attachments are as in Hapale; but the 

 muscle is more or less separable into two parts which blend 

 completely below. In the Hapalidse, although distinct and 

 separate in my specimen, it does not appear to be always 

 present. In H. penicillata (9), what is described as the 

 highest bundle of adductor magnus, springing from the 

 ischial ramus, and inserted into the femur between the 

 greater and less trochanters, probably represents adductor 

 brevis. In the three specimens of H. jacchns dissected by 

 Windle, and in the Midas rosalia, there was no distinct 

 adductor brevis. In two of the Anthropoids (chimpanzee 

 and orang, 7) it is divided into two portions, which fuse 

 towards insertion as in the lemur. In orang and gibbon it is 

 attached to the adductor magnus near insertion. 



Adductor magnus. Besides the muscle already described 

 as presemi-membranosus, which in man is part of the 

 adductor magnus, there were two other constituents of 

 this muscle, (a) A large muscle which arose from the ventral 

 surface of the body, and inferior ramus of the pubis, external 

 to gracilis, below the adductor brevis, and internal to the 

 obturator externus. The fibres spread out with an obliquity 

 increasing from above downwards, to be attached to the 

 posterior surface of the shaft of the femur, along a broad line 

 leading from the lesser trochanter downwards to within a 

 short distance of the internal condyle of the femur, (b) A 

 long muscle whose origin was the lower edge of the inferior 

 pubic ramus, between the gracilis and the presemi-mem- 

 branosus. It proceeded downwards, closely applied to the 

 posterior surface of the preceding part of the muscle, to 

 which it was only loosely connected by areolar tissue, and 

 between it and presemi-membranosus. It was inserted into 

 the outer half of the popliteal surface of the femur, extending 

 down to the outer condyle. 



