f 
Genus— EO LOP HUS. 
Eolophus Bonaparte, Rev. et Mag. de Zool., 1854, 
p. 155 . . . . . . . . . . Type E. roseicapillus . 
Also spelt — 
Eitiophus Gray, Handl. Gen. Sp. Birds, Pt. II., p. 170, 1870. 
Medium-sized Kakatoeine birds of peculiar coloration with short full crest, 
small stout bills, long wings, long tails, small legs and feet. 
The distinct nature of this genus is seen in its coloration, which is 
emphasized by the different wing formula. The bill is small and stout, 
comparatively broader than in the preceding genera, the keel of culmen 
rounded, the tip short, the edges of upper mandible strongly sinuate. The 
under mandible is more triangular, being narrow at tip, but broad at base, the 
edges little sinuate. 
The crest is very short and full with the feathers broad. The cere is 
feathered as are the lores but there is a small bare space round the eyes. 
The wing is long with the first primary equal to the fifth, the second, 
third and fourth being longest and subequal. The secondaries are short. 
The tail is long, composed of broad feathers and more than half the 
length of the wing. 
The legs and feet are small and of normal formation. I have always 
been puzzled why this form should have been lumped with the White 
Cockatoos, while Licmetis, which is a White Cockatoo, should have been 
admitted as a distinct genus, simply on account of its longer bill, a comparatively 
trivial character. As a matter of fact the wing formation is quite different 
and this is obviously emphasized by the peculiar coloration, a feature of much 
more taxonomic value than the mere prolongation of the bill. 
In the paper on Ptilosis already quoted Miller has a footnote (p. 134) : 
“ The Rose Cockatoo, Cacatoes roseicapilla, is generically distinct from true 
Cacatoes , the proper name for the monotypic group being Eolophus Bonaparte 
{Rev. et Mag. de Zool., 1854, p. 155). The two genera differ conspicuously in 
the form of the wing and in coloration. In Eolophus the crest is shorter and 
broader, approached, but I think not equalled, by certain species of Cacatoes. 
In Cacatoes the secondaries are very ample reaching nearly to the tip of the 
wing which is broad and truncate, the ninth primary equal to or shorter than 
the sixth. In Eolophus the secondaries are shorter and smaller, and the 
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