MUSCULAR SYSTEM 



93 



larger at the ankle than at the knee, and the muscles are equally 

 fleshy from origin to insertion. 



Aeby has tabulated the measurements of the tibial muscles, 

 taking loo as the unit of measurement and arranging the dis- 

 tinct groups of muscles accordingly. With regard to the 



Trapezius 



Deltoid m. ?- 



M . coracoidus H 



M. biceps / 

 M. triceps g 



Flex, digit, subli 



M. oppon. poll. ._ 



Abductor 

 Flexor brev.f- 

 Adductor" 

 Flexor indie. 



) Sternocleido- 

 J mastoideus 



M. pect. maj. 



M. brach. intern, t. 



M. pronator trans. , /_ 



M. supinator longus 'I ~ 



M. radial inter. 

 M. radial ext. 



im. >- 



M. rerm. 

 digit. 



Abductor dig. quinti. 



PIG. 45. Muscles of arm and hand, front aspect. (Thome, Zoologie.) a, m. palmaris 

 brev. ; fj, serratus maj. ; y, m. abdom. obliq. ext. ; 8, fibrous sheath of rectus 

 abdom. 



gastrocnemius muscle, man shows the highest figures with 

 57' 2 per cent., as opposed to 35 per cent, for the chimpanzee 

 and 27'8 per cent, for the orang ; in the pronator muscle of 

 the foot both animals surpass man, but in the supinator, man 

 comes first with IO'4 per cent, against 7^9 per cent, for the 

 orang. With respect to the extensor and flexor muscles of the 



