Mr. O. Thomas oti 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, tlie proportions of their skulls being 

 tliercfore quite different from those of ordinary squirrels. 

 Those four are the following : — aS'. laticaudalus, Miill. & 

 Schl., formed into a sejjarate genus, Rhinosciurus, by Gray, 

 on account of the great length of its muzzle ; S. Pernyij 

 M.-Edw. ; 6'. ruft(jenis^ Bhuif. ; and 8. 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 8. 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 175millim.; 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. 



