Fig. 33. Left side of pelvis—natural size.

Fig. 34. Left femur—
natural size.

Fig. 35.
Patella—
natural size.

Fig. 36. Tibia and fibula—
natural size.

The pelvis is elongated, slender and lightly built, indicating the same characteristics in the whole hind limb. The femur has a small rounded head on a well marked neck. It is excessively long, longer than that of Pachyrukhos, and also straighter. It is further distinguished by the third trochanter being swung onto the back side of the bone. The tibia and fibula are separate throughout their entire length, in which this genus is in strong contrast to Pachyrukhos, where these two bones are fused, both distally and proximally.