ERG RPA NIGiEs PiReliGies seaitSalp 
Acknowledqaments 
T is a duty as well as a pleasure to acknowledge the very 
great assistance given us by the Oological Fraternity in 
general in bringing the catalog into being. 
To the Committee of Twenty-five who labored earnestly 
and long with the question of prices, and the final Committee 
of review, we all owe a debt of lasting gratitude. 
To W. E. Clyde Todd, of The Carnegie Museum of Pitts- 
burgh, who kindly volunteered to read proof on the scientific 
names, the publisher is under very special obligations for 
lifting the burden of responsibility from our busy shoulders. 
To George Miksch Sutton, of the same institution we are 
likewise obligated for the splendid half-tone drawing of the 
eggs, illustrative of the proper method of marking. 
R. M. BARNES. 
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