14 LIST OF PLATES. 



Plate 51. 



Herring-Gull. 

 Iceland Gull 

 (Greenland, May 28, 1878, Ellingren). 

 Lesser Black-backed Gull 



Plate 52. 



Common Gull. 



Greater Black-backed Gull. 



Laughing Gull. 



Plate 53. 



Black-headed Gull. 

 Great Black-headed Gull 



(Astrakhan, Henke). 

 Adriatic Gull. 



Plate 54. 



Little Gull 

 (Kassarien River, Esthonia, May 29, 1873, Russow). 

 Bonaparte's Gull 

 (Anderson River, June 18, 1863, MacFarlane). 



Sabine's Gull 

 (St. Michael's, Alaska, June 13, 1880, Nelson). 



Plate 55. 



Richardson's Skua. 

 Great Skua. 

 BufFon's Skua. 

 Pomarine Skua 

 (Greenland, Governor Fencker, Coll. Smithsonian Institution). 



