REVISION OF AUSTRALIAN JERBOA MICE. 
Teeth . — Index of incisors 65°-67°. 
Habitat . — Lake Eyre District, South Australia. 
Type . — In the National Museum of Victoria, c? , R13740, from Mulka, E. of 
Lake Eyre, S.A. 
Dimensions of Type . — Head and body 104 mm.; tail 149 mm.; hind foot 
35 mm. ; ear 23 mm. (dry). 
Skull . — Greatest length 29 mm. ; greatest breadth 16 mm. ; nasals 10.5 x 
3 mm. ; interorbital breadth 6.3 mm. ; palate length 14.5 mm. ; breadth 
outside M. 2 7 mm. ; breadth inside M. 2 3.8 mm. ; palatal foramina 5.3 x 2 mm. ; 
diastema 7.8 mm. ; upper molars 5 mm. 
Fifteen specimens examined from the type locality, Mulka. Nat. Mus. 
Nos. R13709, R13712, R13726-7, R13729-35, R13740-1. 
The series of this species was sent, amongst other animals, 
to the National Museum by Mr. George Aiston, of Mulka. In 
recognition of his interest and work, it has been named after him. 
Distribution. 
The map (Plate VI) showing distribution is self-explanatory 
and needs little comment. Only specimens at present being 
dealt with have been recorded on the map, and only such of 
those with which a specified habitat has been preserved. 
Generalized localities such as West Australia, Central Australia, 
etc., have been ignored. 
Notomys gouldi appears to be confined to the south-west 
corner of West Australia, in country having a rainfall of 
from 20 to 40 inches annually. A number of specimens 
labelled “West Australia’’ were collected by Maxwell 
(1871), who is reputed to have lived near Perth within 
that area. This needs verification. 
N. mitchelli and its subspecies are on the fringe of the desert 
country with an average rainfall of 10 inches or less. It 
is probable that N. m. alutacea extends for someMistance 
inland from its only specified locality, Ooldea, a number 
of specimens being labelled “Central Australia.’’ 
N. alexis, N. cervinus, Podanomalus longicaudatus , and 
P. aistoni are in true Central Australian desert conditions, 
the animals being taken almost exclusively in sandy 
localities. 
Key to the species of Jerboa Mice. 
The classification of certain species is in doubt, and the key 
has therefore been divided into two parts, the first dealing with 
species examined by me, the second with those I have not seen. 
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