EXPLANATION OF PLATES, 
HALFTONE PLATES. 
PLATE 1. 
Egg of great auk in the collection of Col. John E. Thayer, Lancaster, Massachu- 
setts, formerly in the collection of Sir William Milner, Nunappleton, York- 
shire, England, and purchased by him in 1847 from M. Perrot, a dealer in 
Paris, a photograph presented by Col. J. E. Thayer. 
PLateE 2, 
Upper: Nesting site of western grebe near Crane Lake, Saskatchewan, June 
8, 1905, referred to on page 3. 
Lower: Nest and eggs in the above locality. 
Prats 3, 
Upper: Nest and large set of eggs of western grebe, referred to on page 5. 
Lower: Young western grebe recently hatched, a photograph presented by Mr. 
William L. Finley. 
PLATE 4. 
Upper: Nesting site of Holbeell’s grebe, Lake Winnipegosis, Manitoba, June 11, 
1913, referred to on page 10. 
Lower: Nest and eggs in the above locality. 
Pate 5. 
Upper: Another nest and eggs in the same locality. 
Lower: Holbeell’s grebe on its nest, a photograph purchased from Mr. §. S. S. 
Stansell. 
PLATE 6. 
Upper: Nesting site of the horned grebe, Crane Lake, Saskatchewan, June 7, 
1905. 
Lower : Another nest in the same locality. Both referred to on page 21, 
PLATE 7. 
Upper: Distant view of horned grebe’s nest, eggs covered, Magdalen Islands, 
June 22, 1904, referred to on page 21. 
Lower: Horned grebe on its nest, published by courtesy of Bird-Lore. 
PiaTe 8, 
Upper: Nesting colony of eared grebes, Dry Lake, North Dakota, June 26, 1901, 
a photograph presented by Mr. Herbert K. Job. 
Lower: Nest and eggs of eared grebe in Franklin Gull colony, Lake of the 
Narrows, Saskatchewan, June 12, 1905, referred to on page 29. 
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