289 



Component Moments of Sip Joint Muscles of Cereopithecus mona. 



Muscle. 



Flexion. 



Extension. 



Adduction. 



Abduction . 



1. Psoadiliacus, 



8-93 





3-25 









15 '62 



13 "58 





3. Gluteus maximus, .... 



4. ,, raedius, .... 



5. „ TDinimus, .... 



4-23 

 9-55 

 1-08 







2- 85 



3- 29 

 0-17 



Totals, . . 



23-79 



15*62 



16-83 



6-31 



Subtracting the moments acting in opposite directions, we find — 



Percentage. 



Total flexion, 8 '17 



Total adduction, 10-52 



2. Cereopithecus callitrichus ? (male). 



From a fine specimen of this Monkey I obtained the following re- 

 sults : — 



Muscle. 



Actual Weight. 

 Grs. 



1. Psoadiliacus, 360 



2. Pectinseus, ........ 88 



3. Obturator externus, 77 



4. Adductores, 710 



5. Quadratus femoris, ..... 66 



6. Obturator internus, 100 



7. Gluteus maximus, 192 



8. ,, medius, 490 



9. ,, minimus, 60 



Totals, 



4607 grs. 



1. Proper muscles of hip joint, 



2. Flexors of knee, 



Percentage. 



8-0 

 1-9 

 1-7 

 15*4 



1- 4 



2- 2 

 4-2 



10-6 

 1-3 



1. Biceps femoris, 649 14-1 



2. Semimembranosus, 297 6 '4 



3. Semitendinosus, 176 3*8 



4. Gracilis, 198 4'3 



5. Sartorius, 33 0"7 



6. Quadriceps extensor femoris, . . 1111 24*0 



Percentage. 

 , 46-7 

 . 29-3 



46-7 



53 -3 



100-0 



3. Extensors of knee, 24*0 



100-0 



