(Showing its internal structure) A, tendon of the semi-membranosus muscle cut across; B, F, tendon of same muscle; C, internal condyle of femur; D, posterior crucial ligament; E, internal interarticular fibro cartilage; G, bursa under knee-cap; H, ligament of knee-cap; K, fatty mass under knee-cap; L, anterior crucial ligament cut across; P, patella, or knee-cap ]

The femur is quite like that of a horse, and has the characteristic fossa above the external condyle.

The femur is more like that of the Paloeotheria than that of the horse, and has only a small depression above its outer condyle in the place of the great fossa which is so obvious in the Equidoe.