The bones comprised in this region are the femur or thigh-bone, the patella or knee-cap, and the tibia and fibula. Then come the bones of the hock, the astragalus, calcis, cuneiform magnum, cuneiform medium, cuneiform parvum, and cuboid. The bones below the hock are the same as those already described in speaking of the fore extremity - the three metatarsal, suffraginis, two sesamoid, coronas, pedis, and naviculare.