LOXORNIS CLIVUS 231 
concavities, separated by a median spine. The shaft is 
rectangular in cross section, has a shallow depression on 
the anterior face extending from the upper end to below 
the middle of the shaft; while on the posterior surface is a 
Fig. 157. Fibula—1 /2 
natural size; outline 
from impression in ma- 
trix. 
Fig. 155. Femur—1/2 
natural size. 
Fig. 156. Tibio-tarsus 
—1/2 natural size; fib- Fig. 158. Tarso-met- 
ula indicated in out- atarsus, front view— 
line. 1/2 natural size. 
similar furrow, which is however bounded by a higher 
ridge on the external margin. The distal articular condyles 
are almost bilaterally symmetrical, the middle one being 
about half again as large as the two lateral ones. Just 
above the cleft between the condyles for digits III and 
IV there is a moderate sized perforation. 
