EXPLANATION OF PLATES. 



HALFTONE PLATES. 



Plate 1. 



Black-footed albatross, adult and downy young, Laysan Island, a photograph 

 presented by Mr. Alfred M. Bailey. 



Plate 2. 



A nesting colony of black-footed albatrosses, Laysan Island, Pacific Ocean, a 

 photograph presented by Mr. Alfred M. Bailey. 



Plate 3. 



Upper : A nesting colony of Laysan albatrosses, mostly young birds, Laysan 

 Island. 



Lower: Adults and young Laysan albatrosses, liaysan Island. Both photo- 

 graphs presented by Dr. Walter K. Fisher and referred to on page 12. 



Plate 4. 



Upper: Nuptial dance of Laysan albatross, first step. 



Lower: Nuptial dance of Laysan albatross, second step, Laysan Island. Both 

 photographs presented by Dr. Walter K. Fisher and referred to on page 12. 



Plate 5. 



Upper : Nuptial dance of Laysan albatross, finale, Laysan Island. 

 Lower : A more common method of ending the dance. Both photographs pre- 

 sented by Dr. Walter K. Fisher and referred to on page 12. 



Plate 6. 



Upper : Young Laysan albatross, Laysan Island. 



Lower: Adult Laysan albatross feeding its young, Laysan Island. Both 

 photographs presented by Dr. Walter K. Fisher and referred to on page 13. 



Plate 7. 



L^pper : Adult and young sooty albatross, South Georgia. 



Lower: Group of sooty albatross in the Brooklyn Museum. Both photographs 

 presented by Dr. Robert Cushman Murphy and published by courtesy of the 

 Brooklyn Museum and the American Museum of Natural History. 



Plate 8. 



Nesting colony of giant fulmars, Sea Lion Island, Falkland Islands, a photo- 

 graph by Mr. Rollo H. Beck, presented by the American Museum of Natural 

 History. 



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