THE MUSCLE. 



347 



Biceps femoris. The relative size of this muscle in man 

 is much inferior to its possible development, and in that it 



FIG. 312. SUPERFICIAL MUSCLES OF RIGHT LEG OF IGUANA. 



BF t muscle like the biceps ; EB 1 -^, extensor brevis digitorum ; ELD, extensor 

 longus digitorum ; FC, femoro-caudal ; G, gracilis ; GMx, muscle like the 

 rectus femoris ; Go E, gastrocnemius externus ; IP, ilio-peroneal ; P l and P 2 , 

 peronei muscles ; P/ t muscle resembling in some respects the glutens maxinaus ; 

 SM* and SM Z , semi-membranosus ; TA, tibialis anticus ; VEx, vastus ex- 

 ternus ; x, caudal muscle. 



has in him a separate head, taking origin from the femur, it 

 is exceptional. Sometimes (as e.g. in the Agouti) this muscle 



