PELECANOIDES. 
accurately with the descriptions of the genus Pelecanoides or Haladrmna, I 
consider that the genus Pujfinuria should be recognised, and also that two 
species are at present confused under the specific P. urinatrix, but there is not 
sufficient material to decide this matter. 
Young in down show the nostrils to be vertical from the earliest stage, 
and therefore this must be a very ancient group. In the genus Puffinus I 
have shown that the nostrils open horizontally in the downy young, and as 
the bird grows older they become forced up until the adult has the nostrils 
semivertical. The character of the nostrils alone is sufficient for the 
separation of these birds as a distinct family, and the internal characters 
amply confirm this procedure. 
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