﻿B 
  I 
  K 
  r> 
  S 
  OF 
  X 
  E 
  >\^ 
  YORK 
  

  

  Memoir 
  12. 
  N. 
  Y. 
  State 
  Museum 
  

  

  Plate 
  16 
  

  

  %,._ 
  

  

  '■tJ^,., 
  

  

  

  

  REDHEAD 
  

  

  A-iithya 
  amcricami 
  (Eytou) 
  

  

  MALES 
  

  

  CANVASBACK 
  ,,„., 
  

  

  A.ythya 
  vallisneria 
  (Wilson) 
  

  

  MALES 
  

  

  All 
  k 
  nat. 
  size. 
  

  

  4im} 
  (ifatftzSu^ti^. 
  

  

  