MUSCLES OF THE HIND-LIMB 67 



ill. The tibialis anticus lies on the extensor surface 

 of the leg : it arises by a long thin tendon from 

 the lower end of the femur, and divides about 

 the middle of the leg into iTwo bellies which are 

 inserted into the proximal ends of the astragalus 

 and calcaneum respectively. 



iv. The extensor cruris lies along the preaxial side of 

 the tibialis anticus, partly covered by this and 

 partly by the strong fascia of the leg. It arises 

 by a long tendon from the preaxial condyle of 

 the femur, runs in a groove in the upper end of 

 the tibia, and is inserted into the extensor surface 

 of the tibia along nearly its whole length. 



v. The peroneus is a stout muscle which lies along 

 the postaxial surface of the leg, between the 

 tibialis anticus and the gastrocnemius. It 

 arises from the distal end of the femur, and is 

 inserted into the outer malleolus of the tibia and 

 the proximal end of the calcaneuin. 



