276 BRITISH BIUDS [vol. vi. 



had it been entirely constant it would have provided an 

 excellent means of identifying females and j'oung males 

 of the two species. 



In the course of his interesting article in the Ank 

 already quoted, Mr. Brewster has shown other differences 

 between Barrow's Goldoneye and the American form of 

 the Common Goldeneye [Nyroca c. americana), none of 

 which, however, seems entirely satisfactory. 



It may here be mentioned that Mr. P. F. Bunyard has 

 recently pointed out (Bull. B.O.C., XXXI., p. 28) that 

 the eggs of the Common Goldeneye are smaller and 

 greener, and the down much paler and the flank-feathers 

 smaller, than in Barrow's Goldeneye. 



