468 



19. Serratus magnus, 



20. Deltoid, . . . 



21. Coraco-brachialis, 



22. Biceps liumeri, . 



23. Brachialis anticus, 



Grains. 



. 90 



100 



7 



135 



50 



24. Triceps, 349 



It is not my intention at present to enter upon a detailed examina- 

 tion of the action of the hip and knee joint muscles in this monkey. It 

 is sufiicient to notice that, although the positions and relations of the 

 parts are so different from those of man, yet that the muscles admit of 

 being divided into the same four antagonistic groups. 



Grains. 



1. Posterior muscles of hip joint, 638 



(glutaei and pyriformis.) 



2. Anterior muscles of hip joint, 693 



(adductores, iliacus, and psoas magnus.) 



3. Extensors of knee joint, 628 



4. Flexors of knee joint, 697 



2656 



Converting these as before into percentageB, we fe4 — 



1. Posterior muscles of hip joint, 24*02 



2. Anterior muscles of hip joint, 26*10 



3. Extensors of knee joint, 23*64 



4. Flexors of knee joint, 26*24 



100-00 



In this monkey, therefore, the four 

 groups of muscles are of nearly equal 

 force ; whereas in man the last group 

 is greatly below the first three in 

 amount of force. 



If we compare the os innominatum 

 of this monkey with that of man, we 

 find very striking difi'erences, which 

 may be seen from an examination of 

 Fig. 5, which represents the outer 

 aspect of this bone, on the right side 

 of the body. This figure should be 

 compared with Fig. 2, which repre- 

 sents the same bone in man. 



The ilio-pectinseal and ilio-ischial 

 lines are not formed by planes, but 

 consist each of a broken line ; they are 

 at right angles to each other, as in man, 

 in the lower portion of their course, 

 but form an acute angle of 30° with 

 each other in their course along the 

 edges of the ilium. 



The next monkey whose muscular 

 anatomy I shall describe is the Ma- 



Fig. 5. 



