130 PKOP. OWEN ON AKG1LL0KNIS LONGIPENNIS. 



or wingless bird, was " pneumatic," therefore part of a bird of 

 flight. But if tibial, the proportions of the humerus of such a bird 

 would far exceed those of the fossils exhibited and referred to that 

 bone. Prof. Owen then pointed out in the supposed tibial fragment 

 intermuscular ridges which, with the more obvious characters he 

 had described, would receive from paleontologists the same inter- 

 pretation as his own. 



