1 J I It I> S OF NEW Y O R K 



Memoir 12. N. Y Slate Museum 



Plate 6 



SABINE GULL ADULT IN summer 

 Xej«a>(i/>iJii (Sabine) 

 LAUGHING GULL adult in summer 

 Jj(xrm atrieiUa Linnaeus 



KITTIWAKE 



Hi«>ta Iridaetyla (Linnaeus) 



ADULT IN summer 



BONAPARTE GULL 



Larun ]>liUailelpliia (Ord) 



ADULT IN SUMMER 

 IMMATURE 



IVORY GULL 



Paguphila aVba Gunnerus 



IMMATURE ADULT IN SUMMER 



All I iiat. size 



