HORN EXPEDITION—MURIDS. 
401 
Although the specimens examined agree closely with the published description 
of Mus g 02 (/di, I believe that if the two forms were placed side by side they would 
be found to be quite distinct. Gould, doubtless from a comparison of external 
characters alone, gives Mus greyly Gray, as a synonym of Musgouldi. If, however, 
the skull of this species at all agrees with that of the former, as described by 
Collett,* there can be no doubt of the specific distinctness of the Central 
Australian examples. 
Observations .—In Ogilby’s Catalogue, loc. cif., the “References” to Mus gouldi 
are printed under Mus greyi, on page 108. 
Mus greyi. Fig. 3, n—f. 
Gray : Grey’s Trav. Austr., App. II., p. 410. 
Collett: Zool. Jahrb., II., 1886-7, p. 837. 
Ogilby: Cat. Austr. Mamm., p. 108. 
The following remarks are based on three specimens received from Alice 
Springs. I am scarcely satisfied of the identification, and their affinities would 
hardly have been suspected had not Collett published his description of skulls of 
Mus greyi, identified by Thomas. He has compared them with the skull of Mus 
rattus, of which I have unfortunately no representative. 
In color the specimens are not of that intense reddish-brown ascribed to the 
species, and the feet are white instead of “ reddish-grey.” As the cranial 
characters appear to be similar, I am inclined to waive the slight ditlerences of 
color, which may be the result of environment. Under the circumstances a 
detailed description will be advisable, more especially as many of the usual 
measurements have not previously been recorded. 
Fur of moderate length and texture. General color dark warmish-brown 
above, but such a small portion of each hair is tipped with this color that the 
under fur, which is dark grey, shows through, sombring the whole. Sides and 
under surfaces yellowish-white; this fur is uniform in color. 
* Zool. Jahrb., ii., 1886-7, p. 837. 
