APPENDIX. 
197 
two, like S. wJuteheadi, both occur in Borneo, which possesses therefore three of the four members of the 
group. Of these species, S. udiiteheadi is evidently most nearly allied to S. exilis , but it is readily 
distinguishable from that, as from all the others, by its beautiful elongated ear-tufts, which, in proportion 
to its size, are probably longer than those of any other known Squirrel, not even excepting Rheithrosciurus 
macrotis. 
Mr. Whitehead informs me that this little Squirrel may often be seen on the upper slopes of Kina 
Balu running up and down the trunks of the trees, and apparently gnawing at their bark. (Figured on 
the opposite page.) 
13. Mus ineraluteus, sp. n., Thos. Ann. Mag. N. H. (6) ii. p. 409 (1888). 
a. 3000 feet. 22/3/88. Type. 
Size large. Fur coarse and harsh, but not spinous. General colour dark greyish brown, the tips 
of the shorter hairs with a silvery lustre. The longer straighter hairs numerous, not markedly lengthened 
on the rump, uniformly black. Under surface a dirty yellowish brown, the tips of the straighter hairs 
dull orange, their base and the whole of the under-fur slaty grey. Ears small and rounded, naked. 
Hands and feet brown ; last hind foot-pad elongate. Tail rather shorter than the head and body, thinly 
haired, dark brown above and below ; rings of scales averaging about 8 or 9 to the centimetre. Skull 
stout and heavily built. Supraorbital edges strongly ridged. Anterior edge of outer wall of infraorbital 
foramen evenly convex forwards. Palatine foramen about equal in length to the two anterior molars 
together, not reaching backwards to the front of m l . 
Teeth powerful; incisors broad, dark yellow in front above and below. 
Dimensions :—Head and body (c.) 285 millim. ; tail (extreme tip wanting) 235 ; hind foot 51; heel 
to front of last foot-pad 26 ; length of the same pad 9'3. 
Skull: tip of nasals to lambda 51; nasals, length 21 - 8, breadth 6\5 ; interorbital breadth 8‘8 ; infra¬ 
orbital foramen, length of outer wall 7 ; palate, length 32; diastema 1G*7 ; anterior palatine foramen 
8*4 ; combined breadth of upper incisors 4*6 ; length of upper molar series 10'7. 
This fine Bat has a certain similarity to the Indian Bandicoot Bats (Nesoldo), resembling them both 
in general external appearance and in the stout and heavy build of the skull and teeth. No species 
hitherto described can be mistaken for it, as all the Oriental Bats which have external or cranial pro¬ 
portions at all similar are distinguished either by having elongated rump-bristles or parti-coloured white- 
tipped tails. 
The single specimen obtained was found lying dead in the forest. 
14. Mus RATTUS, L. 
a, b. 8000 feet. 4 and 5/2/88. 
c, d. 3000 feet. 1/4/88. 
The two specimens from an altitude of 8000 feet have their fur long and soft, while in those from 
3000 feet it is short and harsh, so that it seems difficult to believe that both the forms can be referable to 
the same species. 
15. Mus sabanus *, sp. n., Thos. Ann. Mag. N. H. (5) xx. p. 269 (1887). 
a. 1000 feet. 3/87. Type. 
b. (?) juv. 3000 feet. 21/3/88. 
Fur short and fine, mixed with slender spines along the centre of the back. General colour rufous, 
mixed with brown along the top of the head and back, brighter and clearer on the cheeks and sides, the 
general tone very similar to that of M.jerdoni. Whole of underside pure creamy white, sharply defined 
from the rufous of the sides. Outsides of limbs like sides, but rather greyer, inner sides white ; lower leg 
and ankles greyish brown all round. Hands and feet brown along the middle of their upper surfaces, 
* From Saba, the district of North Borneo in which Mount Ivina Balu is situated. 
