THE BIRDS OF AUSTRALIA. 
but does not occur in the south-west of Australia nor in the interior, the same 
species also ranging through New Guinea. The range of Ducorpsius is similar 
but more restricted, as it does not extend into Tasmania and rather belongs 
to the interior of Australia, and neither reaches South-west Australia nor 
Victoria and the south of South Australia, while different species occur in 
the islands to the north of Australia. 
Eolophus , which has really no place with the White Cockatoos, also 
extends over Australia and Tasmania, although more common as a central 
bird. 
Lophochroa is differentiated by colour and wing-formation, and has 
a peculiar distribution, probably also due to a central origin, as it is more 
common in the interior, and rarely occurs in South-west Australia, more 
common in North-west Australia but otherwise has no northern habitat, being 
missing from the Northern Territory and North Queensland, and it does not 
occur in Tasmania. 
Licmetis , the genus commonly recognised as distinct, has the coloration 
and crest of Ducorpsius and only differs in its longer bill. It is confined to 
the South of Australia, occurring in New South Wales, Victoria, South 
Australia and West Australia, but again does not live in Tasmania. 
It may be noted that it represents Ducorpsius where that genus is 
missing, though probably the two forms may now be met with together. 
Nevertheless it appears a recent evolutionary form and seems of less age 
than Lophochroa , and more closely allied to Ducorpsius than Lophochroa is to 
Kakatoe. 
I have noted some more complications in connection with the genus name, 
and here make explanation as I now view the matter. Cuvier’s Kakatoe was 
introduced with no species named, so I here designate Psittacus galeritus 
Latham as type. I have not on record any prior designation. The Opinions 
indicate that the tj^pe must be selected from the species first added to the 
genus name. 
Again I have no names. It may be argued that Dumeril’s Cacatoes is 
absolutely equivalent and the type of that would be automatically the type 
of Cuvier’s genus. I also named P. galeritus Latham as type of Dumeril’s 
genus, ignorant of Froriep’s action. Froriep’s selection was P. cristatus 
Linne, but I find that Salvadori has rejected that species on account of the 
description being indefinite. The point then arises, what is the status of 
Cacatoes ? Also, will Kakatoe suffer ? Accepting Froriep’s selection, all the 
names cited, Kakatoe, Cacatoes , Plyctolophus, Cacatua, Plissolophus and 
Camptolophus are based on a group separable from the Australian galerita, and 
which would be nameless were Lophochroa (proposed for leadheateri) rejected, 
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