THE MUSCLES OF THE HIND-LIMB. 71 
the middle of the leg into two bellies which are 
inserted into the proximal ends of the astragalus 
and calcaneum respectively. 
iv. The extensor cruris brevis: lies along the preaxial 
side of the tibialis anticus, partly covered by it 
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: 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 external malleolus of the tibia 
and the proximal end of the calcaneum. 
