AUSTEALIAN MASKED GANNET. 
Rothschild has used the bill and feet, size and coloration, and characterizes 
the subspecies as follows : 
Suln dactylatra dactylatm Less. 
Bill horny blue-grey, very slender ; feet and legs yellow. 
Range : Ascension Island and S. Atlantic Coasts. 
Sula dactylatra melanops Hartl. 
Bill greenish-yellow, slender ; feet and legs slatey-blue to dull black. 
Range : Western Indian Ocean (Red Sea and Islands north of Madagascar). 
Sula dactylatra personata Gould. 
Bill yellow, very stout and large ; feet and legs greenish-blue. 
Range : Western Pacific. 
Sula dactylatra californica Rothsch, nov. 
Bill bright yellow, very thick ; feet and legs orange. 
Range : Coasts of California and Central America. 
Ohs . — ^In addition to the colour of the soft parts, this race differs from 
S. d. dactylatra in having a much larger and stouter bill. 
Suh, dactylatra granti Rothsch. 
Bill red ; feet bluish-green. 
Range : Galapagos Islands. 
In his account Rothschild also admits that “ sea-birds are much more 
restricted in their areas than was formerly supposed,” a fact I have emphasized 
for some years now. 
I would still leave in abeyance the matter of the Australian subspecies 
until I have studied my large Eastern Australian series. It will be observed 
that Rothschild has not mentioned my Sula dactylatra hedouti, and has not 
included its locality under any of the forms he has recognised. Consequently 
I cannot understand where he would place it. It neither comes from the 
Western Indian Ocean nor the Western Pacific, so that it might be regarded 
as the sixth form. I, however, am not certain as to its status, and therefore 
have placed it with S. d. personatay very probably incorrectly. 
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