PROTHEOSODON CONIFERUS 



45 



ment being a broad, deep notch on the posterior margin. 

 The greater trochanter is rugose, heavy, and high, but not 

 incurved at the top. The lesser trochanter is a small, thin 

 ridge well below the head. The third trochanter is a large, 

 thin process, projecting almost directly backward, though 

 curved inward at the end, and is situated well below the 



Fig. 17. Left femur anterior side 

 i /2 natural size. 



Fig. 1 8. Tibia and fibula 

 (right) 1/2 natural size. 



middle of the bone. The shaft of the femur is flattened 

 above, but thick, and changes in the lower part to subcy- 

 lindrical. The condyles are small, subequal in size, and 

 widely separated, while the rotular trochlea is relatively 

 wide and shallow. 



The tibia is about three-fourths the length of the femur, 

 very stocky and heavily built. On the proximal end, the 



