THE BIRDS OF AUSTRALIA. 
terminal primaries are elongated, resulting in a more pointed wing, the ninth 
quill much exceeding the sixth. All the species of Cacatoes are wholly white, 
the inner webs of the remiges and rectrices always tinged with yellow or red, 
the crest or parts of the body plumage often marked or tinged with those 
colours. In Eolophus the back, wings and tail are grey, crest whitish-pink, 
rump greyish white and underparts raspberry red. According to Garrod 
(P. Z. S., 1874, p. 588) Eolophus has two carotid arteries, while Cacatoes has 
but one, but as Beddard records two present in both genera the number is hi 
doubt. Reichenow T divides the short-tailed Cockatoos into two genera 
according to the form of the crest, placing the Rose Cockatoo in true Cacatoes 
characterized by a broad-feathered crest, the species with narrow, recurved 
crest feathers standing as Lophochroa. As Eolophus stands alone in form of 
the wing and in coloration, this arrangement is certainly not a natural one. 
Mathews recognizes five segregates of the old genus Cacatoes, a degree of 
subdivision that to many will seem quite unnecessary.” 
I have already commented upon this last sentence. 
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