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 
Be aes aearuaace aii C Giga Saya waturelicees 
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 
