301 
Zoological Society of London. 
on the hinder part, where they assume a greyish white tint, like 
those on the inner side of the ear; feet rather small and white; 
the fore ones greyish at the wrist, and the tarsi indistinctly suf¬ 
fused with yellowish; tail about equal in length to the head and 
body, well-clothed with smallish hairs, which do not perfectly hide 
the scales; those on the upper surface chiefly brownish black, 
slightly pencilled with whitish in parts; on the sides and under 
part white. 
Mus gracilicaudatus. M. vellere longo mo Hi cinerascenti- 
fusco ; corpore subtils albo, indistincte flavo-lavato ; auribus 
parvulis pilis obscuris pleruinque obsitis ; pedibus sordidit 
albis; caudd fusco-nigrd, subtils sordid £ albd. 
. imc. lin. 
Longitudo ab apice rostri ad caudaa basin .... 5 0 
caudee ... 3 5 
ab apice rostri ad basin auris. 1 2 J 
auris .. 0 5 
tarsi digitorumque . 1 1 
Hab. Oakley Creek, Darling Downs, east coast of Australia. 
This species greatly resembles the Mus lineolalus, but differs in 
having the ears smaller, and clothed internally with dusky hairs 
instead of white; the incisor teeth rather broader; the tarsi 
smaller; the fore-feet much smaller; the tail more sparingly 
clothed with hairs, which are of a less pure white on the under 
side, and the darker hairs of the upper surface extending some¬ 
what on to the sides of the tail, and in not presenting that strongly 
marked line of separation between the colouring of the upper and 
under surface. The fur is rather less soft, less tinted with yellow 
on the upper parts, and more so on the sides of the body. 
Mus albocinereus. M. vellere longo permolli, pallide 
cinereo, in dorsum pallide fusco tine to; corpore subtils, 
cauda, pedibusque albis; caudd suprd indistinctb nigro peni- 
cillata; auribus mediocribus pilis albesccntibus vestitis. 
unc. lin. 
Longitudo ab apice rostri ad caudae basin .... 3 9 
- caudee . 3 6 
- ab apice rostri ad basin auris. 1 
- auris . 0 5J 
- tarsi digitorumque . 0 10 
