Mr. O. Thomas on a new Squirrel from Borneo . 171 
XX. — Description of a new Squirrel from Borneo . 
By Oldfield Thomas. 
In the Oriental Region four of the many species of squirrel 
there found are characterized by having their muzzles 
markedly elongated, the proportions of their skulls being 
therefore quite different from those of ordinary squirrels. 
These four are the following : — S. laticaudatus , Mull. & 
Schl., formed into a separate genus, Rhinosciurus , by Gray, 
on account of the great length of its muzzle ; S. Pernyi , 
M.-Edw. ; S. rufigenis , Blanf. ; and S. Berdmorei , Bly *. 
To this list I now have to add a fifth, discovered by that 
able naturalist and collector Mr. A. H. Everett on Mount 
Penrisen, West Sarawak, during the wet season of 1889-90. 
I propose to call it 
Sciurus Everetti , sp. n. 
Fur thick and soft, markedly more so than in the somewhat 
similar S. tenuis , Horsf., found in the same district. Colour 
uniform dark grizzled olive, rather darker than in S. tenuis ; 
sides of cheeks, shoulders, and front of hips with a very faint 
fulvous suffusion. Under surface dirty greyish white, the 
hairs everywhere slaty grey for two thirds their length, then 
tipped on the throat and belly with dirty white and on the 
chin and breast with dull fulvous. Ears short, rounded, not 
tufted or emphasized in colour. Tail unusually short, com- 
paratively short-haired, almost cylindrical, the hairs ringed 
with dull fulvous and black. Skull small and lightly built, 
muzzle proportionally very long and narrow. Premolars f*. 
Molars small and delicate, their series on the two sides 
parallel, little bowed. 
Measurements of the type (an adult skin) : — Head and 
body 175 millim. ; tail, without hairs 109, with hairs 144; 
hind foot, without claws, 40. Skull : tip of nasals to bregma 
(centre of fronto-parietal suture) 36 ; zygomatic breadth 24 # 5, 
interorbital breadth 14 ; length of nasals 15*7, breadth of 
nasals anteriorly 5*2, posteriorly 4 ; palate, length 24*2 ; 
diastema 12 ; length of tooth-series 8*7. 
A second specimen is rather larger, measuring : — Head 
and body 180 millim., tail without hairs 118, hind foot 40*5. 
This species is superficially by no means unlike S. chi - 
nensis , Gr., or S. lokriah , Hodgs., agreeing with both in its 
general size and its uniform dull grizzled olive- colour ; but it 
* See Thomas, P. Z. S. 1886, p. 71. 
