330 EXPLANATION OF PLATES. 



Plate 8. 



Upper: Nests and eggs of kittiwakes, Bird Rock, Quebec, June 25, 1904, re- 

 ferred to on page 38. 



Lower: Young kittiwakes, just prior to the flight stage, Bird Rock, Quebec, 

 July 24, 1915, referred to on page 39. 



Plate 9. 



Upper: Pacific kittiwakes on their nests, Walrus Island, Alaska, July 7, 1911. 

 Lower: Nest and eggs of same in the above locality. Both referred to on 

 page 46. 



Plate 10. 



Nesting colony of red-legged kittiwakes. Saint George Island, Alaska, a pho- 

 tograph presented by Dr. Charles H. Townsend. 



Plate 11. 



Upper : Nest and eggs of glaucous gull, Borup Glenn, Greenland. 



Lower: Nearer view of another nest, Sutherland Island, Greenland. Both 



photographs presented by Mr. Donald B. MacMillan and published by courtesy 



of the American Museum of Natural History. 



Plate 12. 



Upper : Nest and young of glaucous gull, Sulwuddy, Greenland. 



Lower: Young glaucous gulls, Cape Kendrick, Greenland. Both photographs 



presented by Mr. Donald B. MacMillan and published by courtesy of the 



American Museum of Natural History. 



Plate 13. 



Upper: Nesting colony of glaucous-winged gulls, Walrus Island, Alaska, July 



7, 1911, referred to on page 68. 

 Lower : Nest and eggs of same, Bogoslof Island, Alaska, July 4, 1911, referred 



to on page 67. 



Plate 14. 



Upper: Nesting resort of glaucous-winged gulls, Flattery Rocks, Reservation, 



Washington. 

 Lower: Nest and eggs of same, Carroll Islet, Washington. Both photographs 



presented by Mr. W. L. Dawson. 



Plate 15. 



Upper : Distant view of nest of great black-backed gull, south coast of Labra- 

 dor, May 25, 1909. 

 Lower : Nearer view of same nest, referred to on page 77. 



Plate 16. 



Upper: Great black-backed gull, trumpeting, Lake George, Nova Scotia, July 



28, 1912, referred to on page 84. 

 Lower: Adult and young bird, one year old, same locality and date. Both 



photographs presented by Mr. H. H. Cleaves. 



