EXPLANATION OF PLATES. | 235 
PraTe 19. 
Upper: Breeding colony of puflins, referred to on page 89, a photograph pre- 
: sented by Mr. F. A..Brown. 
ower: Puffins on the top of Bird Rock, near their nesting burrows, July 25, 
1915. 
Pate 20. 
Upper: Entrance to burrow of puffin, June 9, 1909, referred to on page 91. 
Lower: Same burrow opened to show nest 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 same colony. 
PLATE 22, 
Upper: Nesting site of rhinoceros auklet, referred to on page 104. 
“ower: Nesting burrow in same colony, opened to show nest and egg. Both 
‘photographs presented by Mr. William L. Dawson. 
PLATE 23. 
Entrance to burrow of rhinoceros auklet, a photograph presented by Mr. 
William L. Dawson. ; 
Prate 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 
ee) by Mr. George Willett.” 
‘puae 8 ee one 
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. Ha 
PLatTE 26. es aul 
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 pagé 129. 
Prats 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. 
