490 



14. M. glutceus quartus {ilio-capsularis), . . I'll 1 



. . 1-2/- ' '* 

 Origin and insertion marked in Figs. 28, 29, 27. cp. 



15 oz. 



B. Muscles of the Knee Joint. 



M. biceps femoris, 9*4 1 



■4/ 



12- 



10-90 oz. 



Takes 'its' origin from the large concave post- 

 acetabular surface of the ilium, marked in Fig. 28 ; 

 and is inserted by a round tendon passing through 

 a looped pulley placed at the inner side of the 

 outer head of gastrocnemius and outer condyle of 

 the femur, into the large tubercle of the fibula, 

 at its upper point of trisection. 



2. M. semimembranosus, 



4-4\ 

 7-2/ 



5-80 oz. 



The semimembranosus arises from the poste- 

 rior margin of the ilium, adjoining the ischium 

 (Fig. 28, s. m.), and from the sides of the 1st, 

 2nd, and 3rd caudal vertebrae ; and flows freely 

 over the posterior margin of the ischium (5. t), 

 and is inserted by means of a pinnseform tendon 

 (shown at s. m. and ac. Fig. 30) formed with 

 the help of the accessorius, into a final flat ten- 

 don forming one of the heads (/3) of the gastro- 

 cnemius, on the inner side 



3. M. semimembranoso 

 accessorius, 



0-6 

 0 



J}.- 



0-70 oz. 



Fig. 29. 



This muscle is shown in Fig. 30, ac. 



Fig. 30. 



