Aythya affinis. 
Jamaica Pond, Mass. 
fc- 
(a 
21 NASSAU STREET. 
NEW YO R K . 
'■ 33/ 
SS ^z/77z3/' 
7^37 . S^ 
^3^Z3u7s /&7y7^ 771^7/3 tSS 
7*''S?<7~7 <■ -"' y 
77/Ce/73SS/37sY 
TTS^ 
T^z^T-tTL ~yS*^ yfS^/ 
Y/S/3s 37^z^t/3 ^ - 
T/t/^Zzy ^ z / zy^r ^^ ^ 
^ - - - " ^ ■ - YSzgTZTS' u/^£h*+'- 
* 1 
7 
