32 
HORN EXPEDITION—MAMMALIA. 
above (and also otlier specimens from Central Australia of which measurements 
have been made), whilst they agree generally in length of the body with the 
measurements given in the British Museum Catalogue, vary from these in the 
uniformly greater length of tail, and the slightly greater length of the hind-foot. 
In the greatest width of the latter (across the region of the pads at the base of the 
toes) they are all closely similar, varying only between 2'7 and slightly more than 
3 mm. The head is pi’ojiortionately narrower and longer in all of them than in 
specimen h. There can however be little doubt but that they are all referable to 
the species crassicm/dafa, and that the greater length of tail, which, however, never 
exceeds that of the body, and the greater length of the head indicate merely a 
local variation. 
In all specimens there are present a few long whisker-like hairs just above 
the wrist which point outwards and backwards, and the longest of which measures 
12 mm. 
N'fl/e .—A specimen received in August has ten young ones attached to the 
teats. These had evidently been pioduced in July after the occurrence of an 
exceptionally good season. Under favourable circumstances there are evidently 
therefore at least two breeding seasons in Central Australia. Females with young 
attached were secured in November and December, and again after the lapse of 
six months (during which period, though many were captured, none had young) 
in July. It may also be noticed that the full number of young were only 
observed at the close of an exceptionally good season. 
(h) Sininthopsis viuriiia, Waterhouse. Common pouched mouse. 
This species does not appear to be common in the central district, for, 
although a large number of the closely-allied S. crassicaudata have been secured, 
only two specimens of it were obtained, one at Alice Springs and one at 
Oodnadatta. INIr. Byrne, who, as wdll be seen from this report, has collected a 
very large number of marsupials, and is thoroughly well acquainted with those 
existing in the Charlotte Waters district, has not as yet met with this species. 
The foot is proportionately broader than in S. ci'nssicatidata, and the tail is 
longer than the head and body, and is not incrassated. 
The face, as described in A. imirinn^ has a darker mark in front of and around 
the eyes, but the same is also present in all the specimens of S. crassicaj/daia, the 
colouration of the two species, so far as the Central Australian specimens are 
concerned, agreeing very closely. 
The upperis notably larger than either or/h 
