HORN EXPEDITION—MAMMALIA. 
7 
There then followed, in some cases, a differentiation of forms separated by the 
central area, resulting for example in the existing M. eugenii on the west and its 
close ally, M. parma^ on the east. In the case of M. rohustus we have an example 
of a form which either was able to maintain its existence despite the change in 
climate or else migrated subsequently from the north-east. 
Following upon the extinction in the central area of the greater part of its 
mai’supial fauna, there ensued a migration of such forms as could live in an arid 
region, and the differentiation of a certain number such as Dasyuroides /yniei, 
Phas. mncdomiellensis, Smmthopsis psammophilus, S. larapitita^ and others not yet 
discovered. The one form which is at once the most modified and pre-eminently 
distinctive of this region is Notoryctes typhlops. 
The following talffe indicates the distribution of tire marsupials known from 
Central Australia! :— 
— 
W.A. 
1 
Int. N.S.W. 
Coast N.S.W. 
O' 
Coast Q. 
North. Territ. 
Int. Vict. 
Coast Viet. 
Macropus rufus - - - 
X ? 
X 
X 
Macropus robustus 
X 
X 
X 
Petrogale lateralis 
X 
Onychogale lunata 
X 
X 
Lagorcliestes conspicillatus 
{vnr. leicharcltii) 
X 
Bettongia lesueuri 
X 
X 
Trichosurus vulpecula - 
X 
X 
X 
X 
X 
X 
X X 
X 
Peragale lagotis - - - 
X 
X 
Choeropus casta notis 
X 
X 
X 
X X 
Phascologale cristicaitda 
X 
Phascologale calura 
X 
X 
*Phascologale macdonnellensis 
Siuinthoiasis murina 
X 
X 
X 
X 
X 
X 
X 
X 
Sminthopsis crassicaudata 
X 
X 
X 
X 
X 
X 
X 
X 
*Sminthopsis psanimophilus 
^Sminthopsis larapinta 
* Dasyuroides byrnei 
Antechinomys laniger 
X 
X 
*Notoryctes typhlops 
* Those marked with an asterisk are peculiar to Central Australia so far as at present known. 
t In addition to those named in this list, there certainly exist in Central Australia a species of Dasj'urus and at 
least one of Perameles. Mr. Gillen informs me that .at Alice Springs the l)l.acks have a special corroboree associated 
with the “Chilperta,” or native cat. Peramelest fanciatun is included in Sanger’s list, and Mr. Byrne, of Charlotte 
Waters, who is well acquainted with the marsupial fauna of that district, tells me that he knows of tlie existence 
of one species of Perameles, and believes that a species of Peragale occurs of considerably smaller size than, atid 
distinct from, P. lar/otis. 
