EXPLANATION OF PLATES. 235 



Plate 19. 



Upper: Breeding colony of puffins, referred to on page 89, a photograph pre- 

 sented by Mr. F. A. Brown. 



Lower : Puffins on the top of Bird Rock, near their nesting burrows, July 2.5, 

 1915. 



Plate 20. 



Upper : Entrance to burrow of puffin, June 9, 1909, referred to on page 91. 

 Lower : Same burrow opened to show nesst and egg. 



Plate 21. 



Upper: Nesting site of horned puffin, June 9, 1915, near St. Michael, Alaska, 



from negative taken by Mr. F. Seymour Hersey for the author. 

 Lower: Another view of the game colony. 



Plate 22. 



Upper : Nesting site of rhinoceros auklet, referred to on page 104. 

 Lower: Nesting burrow in same colony, opened to show nest and egg. Both 

 photographs presented by Mr. William L. Dawson. 



Pi^te 23. 



Entrance to burrow of rhinoceros auklet, a photograph presented by Mr. 

 WUliam L. Dawson. 



Plate 24. 



Upper: Entrance to burrow of Cassin's auklet, a photograph presented by Mr. 



William L. Dawson. 

 Lower: Burrow of Cassin's auklet opened to show bird and egg, a photograph 



presented by Mr. George Willett. 



Plate 25. 



Upper: Nesting site of paroquet, crested and least auklets, July 7, 1911, re- 

 ferred to on pages 117, 121, and 129. 

 Lower : Nest and egg of paroquet auklet in above locality. 



Plate 26. 



Upper : Nest and egg of crested auklet, July 7, 1911, referred to on page 121. 

 Lower : Nest and egg of least auklet, July 7, 1911, referred to on page 129. 



Plate 27. 



Nesting colony of least auklets, a photograph presented by Mr. Charles H. 

 Townsend, locality referred to on page 129. 



Plate 28. 

 Xantus's murrelet on Its nest, a photograph presented by Mr. Donald R. Dickey. 



