184 CALIFORNIA ACADEMY OF SCIENCES _ {Proc. 47 Sz. 
EXPLANATION OF PLATES 
Plate 1—Portrait of Elliott (Coues; from a photograph formerly in the 
possession of the late Dr. D. G. Elliot; reproduced from Bird-Lore through 
the courtesy of Dr. Frank M. Chapman. 
Plate 2—Portrait of Osbert Salvin; reproduced from the Biologia Cen- 
trali-A mericana. 
Plate 3—Portrait of Frederick Du Cane Godman; reproduced from the 
Biologia Centrali-A mericana. 
Plate 4—Sketch Chart of the Oceans. 
Plate 5—Map of the Galapagos Islands. 
Plate 6 
Above, Diomedea irrorata at rookery on Hood Island. 
Below, Diomedea irrorata with egg at rookery on Hood Island; in the 
foreground Nesomimus macdonaldi, in the background Fregata aquila (old 
and young). 
Plate 7 
Above, Diomedea irrorata at rookery on Hood Island. 
Below, Diomedea irrorata “fencing” at rookery on Hood Island. 
Plate 8 
Above, Diomedea irrorata with feathers on sides of head raised in anger, 
at rookery on Hood Island. 
Below, Diomedea irrorata with feathers on sides of head in usual posi- 
tion, at rookery on Hood Island. 
Plate 9—Diomedea HOTELS lower aspect of light and dark phases of 
nestling. 
ae 10—Diomedea irrorata; upper aspect of light and dark phases of 
nestling. 
Plate 11—Diomedea irrorata; upper aspect of light phase of nestling. 
Plate 12—Diomedea irrorata; variation in the form of the bill of breeding 
birds (reduced). 
Plate 13—Puffinus creatopus; dual coloration. 
Plate 14—Puffinus opisthomelas; dual coloration. 
Plate 15—Puffinus opisthomelas; melanistic specimen and specimen of the 
light style. 
Plate 16—Uria troille; melanistic specimen. 
Plate 17—Putinus chlororhynchus; light and dark phases. 
