288 



1. Cercopithecus mona? (male). 



Prom the dissection of a specimen of a male Cercopithecus mona I 

 obtained the following results : — 



Muscle. Actual Weight. Percentage. 

 Grs. 



1. Psoadiliacus, 385 95 



2. Adductores, 836 20-7 



3. Gluteeus rnaxinius, 209 ....... 5-1 



4. Gluteus medius, ...... 407 . 10*1 



5. Glutseus minimus, ..... 44 ......... 1* 



46-5 



1. Biceps femoris, 561 13*9 



2. Semimembranosus, ) 



3. Semitendinosus. 



4. Gracilis, . . 



5. Sartorius, 



6. Quadriceps extensor femoris, . 1080 26-6 



4. Gracilis, . . . . ) 



5. Sartorius, . . . j 



10 8-1 



..... 4-9 



53-5 



Totals, . . . 4050 grs. 100 '0 100-0 



Grs. 



Weight of Monkey, 51,860 



„ heart, 286 



„ liver, 1650 



„ brain, 946 



Percentage. 



Proper muscles of hip joint, . 46*5 



Flexors of knee, 26 "9 



Extensors of knee, 26" 6 



100-0 



On projecting the planes of motion of the hip joint muscles on the 

 plane of the rim of the acetabulum, I obtained the following results : — 

 measuring the azimuths of the moments from the plane of motion o 

 the knee joint, which is the natural zero plane for the hip joint — 



Muscle. Azimuth. Moment. 



1. Psoadiliacus, 20° 9 "5 



2. Adductores, . . 139 ..... 20*7 



3. Glutaens maximus, .... 326 5 'i 



4. „ medius, 341 ..... 10 '1 



5. ,, minimus, .... 351 l'| 



If we refer these moments to the plane of motion of the knee joint, 

 which is the plane of Elexion and Extension of the thigh upon the body, 

 and to the plane of Adduction and Abduction, perpendicular to the 

 former plane, we can readily construct the following Table of Compo- 

 nent Moments : — 



