THE BIEDS OF AUSTRALIA. 
circumstances can it be retained. This I recorded in the Austral Av. Bee., 
Vol. II., p. 91, 1914. 
I separated the Northern bird in the Austral Av. Bee., Vol. I., p. 34, 1912, 
under the name Pandion Tialiaetus melvillensis, but I am not recognising it 
in this place, as the characters are not constant and I find moreover, the 
Australian birds, as a whole, constitute only an ill-defined subspecies. 
I only admit therefore all the Australian birds as a subspecies under 
the name 
Pandion halicetus cristatus (Vieillot). 
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