3 * 
FASCICULI MALATENSES 
I have placed M. negitctus in the Pyc/crh subgroup, as the most typical specimens certainly 
agree with the main features of that group. The scries in the Museum, however, shews a wide 
range of variation, which, owing to lack of sufficient data, I have not been able to satisfactorily 
work out. Some specimens closely approach Af. Jlavipcctus, which undoubtedly belongs to the 
Ruftscew subgroup, while others with their large feet and short ears approximate to the 
Grmlventer subgroup, and it is probable that all three subgroups are represented in Borneo. 
Mm nltidusy Hodos., which has been confounded with Mus pyttorts, is a large rat of the Mus 
gristiventer subgroup, resembling this last in the large feet and the comparatively small ears. On 
the back the type resembles M, griseivmter, except in being rather paler, the under parts being 
of a dirty yellowish-grey. Other specimens, however, from the same locality, are very much 
brighter on the back. 
Mus germaini from Cochin, China, is another species of the Criseiventer subgroup, and except 
in its more fulvous colour is not unlike M. nitidus ; the under parts, however, arc yellowish white 
instead of yellowish grey, and the hind feet are also whitish. 
I have not had time or material to go carefully into the Chiysmmus group, but have placed 
them together, as they may all be easily recognized by their extremely soft, woolly fur, entirely 
destitute of spines. The skulls of M. fratrorum and M . datae may be recognized by the long 
snout, flattened bullae, and large teeth. The skull of M. bulutnsis resembles more closely that of 
M. titgketus, but is somewhat intermediate, having the snout more attenuated and the bullae 
flatter than in the last named. 
62. Mus concolor, Blyth. 
Mus concolor, Blyth y J.A.S.B . xxvm, p. 295 (1859) ; Flower , P.Z. 8 . 1900, 
p. 361 ; Bonhote, op . c/ 7 ., p. 879. 
a. $ Bukit Bcsar, Jalor. ioth May, 1901. 
b-e. 3d,i? Biserat, Jalor. 3rd July, 1901. 
f-i. 3 £ » 1 ? Tojan, Nawngchik. 29th Nov., 1901. 
k-m. 3 spms. in ale. Biserat, Jalor. July, 1901. 
‘ The common house mouse of the Patani States.’ 
63. Mus, sp. 
a. 9 ad. Jeram Kawan, South Perak, 13th February, 1902, 
This mouse is apparently closely allied, if not identical, with Mus 
concolor , but is slightly larger, and owing to the size of the skull I do not feel 
justified in assigning it to that species. 
64. Rhizomys sumatrensis {Raffles) 
Mus sumatrensis, Raffles > Trans. Linn. Soc . xm, p. 258 (1822). 
Rhizomys erythrogenys, binders. Zool. Res * Yunnan , p, 324 (1879). 
Rhizomys sumatrensis (Raffles), Flower y P.Z.S. 1900, p. 363 ; Bonbote, he . ci/.> 
p. 881. 
a t b, 9. Kampong Jalor, Jalor. 4th November, 1901. 
c. 9 . Gedong, Batang Padang, South Perak. 12th January, 1902. 
