409 



Teneriffe, on the 26th April, 1891, and sent to me with the parent bird, which differs from those 

 of Pvffinus oiscurus in being rather rounder and less elongated in shape, pure white in colour, and 

 measures 1*7 by 1'32 inch, being also, as will be seen, considerably smaller. 



As this species differs chiefly in having the under surface of the wing whiter, and in having 

 the inner webs of the primaries white and not dusky blackish, I have not deemed it necessary to 

 give a figure of it. 



In the preparation of the above article I have examined, besides the series in the British 

 Museum, the following specimens : — 



JE Mus. H. E. Dresser. 



a, <$ . Orotava, Teneriffe, June 1st, 1889; b, $. Orotava, May 26th, 1889 [Ramon Gomez), c. Santa 

 Ursula, April 26th, 1891 (Gomez). d, $ . Porto Santo, February 14th, 1895 (Padre Schmitz). 

 e, pull. Santa Ursula, April 18th, 1891 (Gomez). 



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