276 On Tioo neio Sciuropteri from Borneo. 



due to the action of spirit it is impossible to say ; hairs of 

 chin, chest, and middle line of belly whitish to their roots, 

 those of sides of belly and under surface of parachute slaty 

 black. Mammae 4. Upper surface of hands brown, some 

 lighter hairs present on tlie wrist ; feet also brown, but the 

 ends of the digits white. Tail markedly distichous, its 

 middle line brown above nearly to the end, its long lateral 

 hairs brownish fawn proximally, gradually darkening to 

 black till within half an inch of the tip, when the whole end 

 of the tail abruptly changes to white. 



8kull short, broad, with a curious sliort conical muzzle, in 

 this way somewhat similar to Dr. Jentink's figure of the 

 skull of S. setosus, but the shortness of the muzzle even more 

 marked. Brain-case broad and rounded. Bullaj of normal 

 size. Incisors strong, deep antero-posteriorly, rather more 

 thrown forward than usual. Cheek-teeth ratiier small ; pre- 

 molars not disproportionally different in size, the three ante- 

 rior teeth increasing quite equally from the small p.^ to ??^.^ 

 Molars smooth and rounded, their crests low and scarcely 

 wrinkled. 



Dimensions of the type (an adult female, measured in 

 spirit) : — 



Head and body 87 millim. ; tail 98; hind foot 20, with 

 claws 21-5 ; ear 17 5x9. 



Skull : greatest length 28 ; basilar length 21*4 ; greatest 

 breadth 18"8; nasals 8'2 x 4 ; intei'orbital breadtii 7; palate 

 length from heiiselion ITS; diastema (to front of p.^) 6*3; 

 length of upper tooth series (from front of p.*) 3"8. 



IJab. Baram District, Eastern Sarawak. Type from the 

 Toyut Kiver; a second specimen from Lobok Nibong. 



Type. Female. Skinned from spirit. B.M.no.99.12.9.8o. 

 Collected and presented by Charles Hose, Esq. 



This striking little species, unique in the possession of a 

 white-tipped tail, was first found by Mr. Hose many years 

 ago, but it could not then be described owing to a doubt as to 

 wiiether it might not be the Sumatran S. platyurus^ Jentink, 

 a species with tiie ordinary dark tail. Now, however, not 

 only has Mr. Hose sent two and seen two more Baram speci- 

 mens, all alike with white-tipped tails, but the Museum owes 

 to the kindness of the late Mr. Theo. C. Barclay a topotype 

 of S. jj^atyurusj and this shows that the two are really quite 

 distinct. 



The second specimen sent by Mr. Hose, also an adult 

 female, is rather smaller than the type, but shares all its 

 essential characters. The type was enceinte, containing two 

 embryos, one in each uterus. 



