2,^ 0*^^ 



ZOOLOGICA 



SCIENTIFIC CONTRIBUTJp!t^'^ OF THE 

 NEW YORK ZOOLOGlGhii/0i:mTY 



VOLUME I, NUMBERS 12, 13, & 14. 



NOTES ON 

 No. 12. THE ONTOGENY OF THE WHITE IBIS 



By 

 C. William Beebe 



No. 13. SPECIALIZATION OF TAIL DOWN IN DUCKS 



By 

 C. William Beebe, and L. S. Crandall 



No. 14. EFFECT OF POSTPONED MOULT IN CERTAIN 

 PASSERINE BIRDS 



By 

 C. William Beebe 



PUBLISHED BY THE SOCIETY 



THE ZOOLOGICAL PARK, NEW YORK 



February. 1914 



