DIOMEDEA NIGRIPES. 



In part III. of his " Avifauna of Laysan " (p. 292, 1900) the Hon. Walter 

 Rothschild mentions a bird sent him by Professor Schauinsland, which he believed 

 to be a hybrid between D. immutabilis and D. nigripes, and of which he gives a 

 description. 



The adult male described was obtained during the voyage of H.M.S. " Challenger," 

 in the north Pacific in June, 1875 : it is figured on Plate 94, and the young bird on 

 Plate 95. 



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