324 
GEOGRAPHICAL ZOOLOGY. 
[part IV. 
Ethiopian regions, a few outlying species only entering the 
Australian or the Palsearctic regions. One family (Todidse) is 
confined to the West Indian Islands ; and another (Leptosomidse) 
consisting of but a single species, to Madagascar ; parallel cases 
to the Drepanididse among the Passeres, peculiar to the Sand- 
wich Islands, and the Apterygidae among the Struthiones, 
peculiar to New Zealand. 
Order IIL—PSITTACI, 
The Parrots hare been the subject of much difference of 
opinion among ornithologists, and no satisfactory arrangement 
of the order into families and genera has yet been reached. 
Professor Garrod has lately examined certain points in the 
anatomy of a large number of genera, and proposes to revolu- 
tionize the ordinary classifications. Until, however, a general 
examination of their whole anatomy, internal and external, has 
been made by some competent authority, it will be unsafe to 
adopt the new system, as we have as yet no guide to the com- 
parative value of the characters made use of. I therefore keep 
as much as possible to the old groups, founded on external 
characters, only using the indications furnished by Professor 
Garrod’s paper, to determine the position of doubtful genera. 
Family 76. — CACATUIDiE. (5 Genera, 35 Species.) 
General Distribution. 
X EOTROFICAL 
Sub-regions. 
NE ARCTIC 
Sub-regions. 
Palsearctic 
Sub-regions. 
Ethiopian 
Sub-regions. 
Oriental 
Sub-regions. 
Australian 
SUB-REGIONS 
1.2 
The Cacatuidse, Plyetolophidse, or Camptolophidse, as they have 
been variously termed, comprise all those crested parrots usually 
termed Cockatoos, together with one or two doubtful forms. 
They are very abundant in the Australian region, more espe- 
cially in the Austro-Malayan portion of it, one species inhabiting 
