WHITE COCKATOO. 
length of wing of 325 mm., but from Sorong there are specimens which 
measure 300 mm., and from Sele, south of Sorong, a male that measures 295 
mm. From Waigeu, Gebe, Salawati and Misool there are very small examples 
in the collection of the Leyden Museum, with a length of wing of 260 mm., 
but from these localities there are also specimens which are even as large as 
specimens from North-west New Guinea, f.i., a male from Waigeu measures 
320 mm. This species varies considerably in size, but the variations are 
individually ; at the same place we find large and small individuals. The bill 
is also subject to variation. It seems, however, that birds from the Aru 
Islands are constantly smaller and never attain a length of wing of 300 mm., 
and therefore only the form of the Aru Islands must be separated under the 
name of Cacatua galeritus macrolo'phus von Rosenberg ; twelve examples in the 
Leyden Museum have a length of wing of 260 to 290 mm., the greater part of 
about 280 mm.” 
Berlepsch ( Abhandl . Senckenb. Naturf. Gesellsch. Bd. XXXIV., 1911), 
writing on the Birds of the Aru Islands under the name Cacatua triton macro - 
lopha, correctly noted that should these be distinguished from My sol, etc. 
birds, than which they appeared less, they would require a new name. 
In my “ Reference List to the Birds of Australia ” (Nov. Zool., Vol. XVIII., 
p. 264, January, 1912.) I sub specific ally named this species as follows : 
“ Cacatoes galerita galerita (Latham). New South Wales, Victoria. 
Cacatoes galerita licmetorhyncha (Bonaparte). Tasmania. 
Cacatoes galerita fitzroyi subsp. n. North West Australia. 
Cacatoes galerita queenslandica subsp. n. North Queensland.” 
The two new subspecies I diagnosed thus : 
“ C. g. fitzroyi. Differs from G. g. galerita in having no yellow on the 
earcoverts, the eye-space bluish, and in having a much more massive bill.” 
“ C. g. queenslandica. Differs from C. g. galerita in its smaller size. Wing : 
$ 323 mm. Typ. ar. 350 mm.” 
It will be noted that the last named was provided for the birds classed 
by Robinson and Laverock as C. g. triton. 
I afterwards added two more subspecies thus : 
Cacatoes galerita rosinae. Kangaroo Island, South Australia. 
“ Differs from C. g. galerita in its smaller wing (297 mm.) and smaller bill.” 
Cacatoes galerita melvillensis. Melville Island, Northern Territory,” 
“ Differs from C. g. fitzroyi in its larger bill and wing.” 
These six subspecies I maintained when I prepared my “List of the 
Birds of Australia,” though I re-examined the specimens with a view to reduction. 
I have again reconsidered my material and now give my latest results. This 
183 
