184 Proceedings of the Royal Physical Society. 



fairly easy. As the two muscles drew near their insertion 

 they separated and diverged, and a vessel passed backwards 

 through the gap between them. 



The pectineus was inserted into the postero-internal 

 surface of the femur below the small trochanter, some 

 of its fibres mixing with fibres of origin of the vastus 

 internus. 



The adductor longus and pectineus were equal in breadth 

 as long as they were fused. After the separation the 

 adductor became expanded and tendinous, and was partly 

 united, especially by its lower fibres, to the adductor magnus 

 lying behind. It was inserted into the second fourth of the 

 posterior surface of the shafc of the femur. 



The pectineus was supplied on its superficial surface by a 

 branch from the anterior crural nerve. The adductor longus 

 was supplied on its deep or posterior surface by a branch 

 from the anterior division of the obturator nerve. 



In lemurs pectineus presents similar attachments (2). In 

 Hapale penicillata (9) it is said not to be present. It is 

 probably present, but more intimately connected with the 

 adductor mass, so that its separation therefrom would be 

 entirely artificial. It abuts very closely on the adductor 

 longus both in gorilla and orang (8). 



The adductor longus is the smallest and shortest of the 

 adductors in the Lemur catta. It arises from the anterior 

 or upper end of the symphysis and the horizontal ramus of 

 the pubis beneath gracilis. It becomes aponeurotic, and is 

 inserted internal to adductor brevis and in close union with 

 it. In L. nigrifrons it is longer and muscular, and is inserted 

 into the adductor magnus. In Galago crassicaudatus it arises 

 as in L. catta, is inserted as in Z. nigrifrons, and is in close 

 apposition with the pectineus. 



The rounded character of its tendon is seen only in the 

 chimpanzee (8). 



Adductor brevis was somewhat smaller than longus. It 

 arose by a rounded bundle of fleshy fibres from the ventral 

 surface of the pubis, below the origin of adductor longus, 

 and external to gracilis. Its fibres passed downwards and 

 outwards in front of adductor magnus, and spread out to be 



