89 



Judged by the preceding, comparative Tables, Man possesses the 

 characteristic referred to, in a lesser degree than the Ostrich, in a greater 

 degree than the Lion, and in a very much greater degree than the 2£a- 

 cacus JVemestrmus. Strictly speaking, the Macaque is neither a biped 

 like the Ostrich or Man, nor a quadruped like the Lion, but is a climber, 

 and has relations of forces among the muscles of the posterior limb 

 suited to that mode of locomotion. 



The following figure, which shows the arrangement of the tendons 

 at the inner side of the knee joint, was drawn from nature by my son, 

 and will serve to explain any obscurity in the preceding descriptions 

 of the muscles and their attachments : — 



Fig. 15. 



INNER SIDE OF LEFT KNEE OF LION. 



Femur. 

 Tibia. 



M. sartorius, reflected. 

 M. poplitceus. 

 M. gastrocnemius. 



q, e, i, M. quadriceps extensor internus. 

 m 1, and m 2, Insertions of M. 



branosus into the tibia, femur, and patella. 

 c, t, Aponeurosis. 



ii, t, Lateral ligament of knee joint. 



Paet II. — Action of the Muscles of the Hip and Knee Joints. 



The most important of the muscles just enumerated exert their 

 action in extending or flexing the thigh upon the body in the plane of 



E. I. A. PJJOC — VOL. IX. N 



