688 INDEX. 



X. 



Page. 

 Xochinacaztli, the sacred ear-flower of the Aztecs (Safford) 427 



Y. 



Yaeger, Wiliain L 93 



Yerkes Observatory (Astrophysics in the United States) 362 



Yukon native customs and folk-lore (Schtuitter) ' 84 



Z. 



Zimmerniann, Maurice 86 



Zoological Congresses, International 24,26 



Zoological Nomenclature, Commission on 24,87 



Zoological Park 5, 9, 21, 36, 68, 77-79, 91, 94, 101 



O 



