SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



VOL. 3b, NO. 3, PL. S 



Fid. 97 



Femur of Anas boscas (mallard duel;) 



Fifi. 98 



Femur of Emberiza citrinella 

 (yellow hammer) 



Fig. 99 



Right femur of Cliauna cristata 

 (crested screamer) 



Fin. inn 



Left femur of Pandion carolinensis 

 (American osprey) 



BIRDS 



