O. C. Marsh—Jurassic Birds and their Allies. 839 
bones of the reptile are indeed there, but they have already 
received the stamp of the bird. 
e of the most interesting points determined during my 
4 
me excellent facilities for examining the Archwopteryx under 
is care. In the first diagram we have represented the pelvis 
saurs, [guanodon, for example, the fibula at its distal end stands 
in front of the tibia, and this is exactly its posi a in Arche- 
r 
opleryx, an interesting point not before seen in bi 
Same structure in both. The vertebre, however, and the pelvic 
nes of Compsognathus differ materially from those of Arche- 
