EXPLANATION OF PLATES. 235 



Plate 19. 



Upper : Breeding colony of puflins, referred to ou page S9, a photograph pre- 

 sented by Mr. F. A. Brown. 

 Lower: Puffins on the top of I'.iril Ttixk. near tlieir nesting liurrows, .Tnly 25, 



1915. 



Plate 20. 



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

 Lower : Same burrow opened to show nest and egg. 



Platk 21. 



Upper: Nesting site of hoi-ned puffin, June 9, 1915, near St. Michsiel, Alaska, 



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

 Lower : Another view of the same colony. 



Plate 22. 



I'pper: Nesting site of rhinoceros auklet, referred to on page 104. 

 sower : Nesting burrow in same colony, opened to show ne:«t and egg. Both 

 photographs presented by Mr. William L. Dawson. 



Pl^\TE 23. 



Entrance to burrow of rliiiioceros anklet, a photograph presented hy Mr. 

 William L. Dawson. 



Plate 24. 



Upper: Entrance to burrow of Cassin's auklet, ;i photogr;iph presented by Mr. 



William L. Dawson. 

 Lower: Burrow of Cassin's auklet oi)ened 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. 



Piate 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. 



