150 ON MAMMALS FROM BILLITON. 



This Maki is known from Java, Savoe (between Sandel- 

 wood and Timor), Sumatra, Banka, Borneo, Celebes, the 

 Saleyer- and the Philippine Islands. 



Sciuropterus vordermanni , n. sp. 



This flying squirrel belongs to the small sized forms like 

 sagitta , aurantiacus '), setosus and platyurus ; it differs in 

 the color of upperparts from sagitta and aurantiacus as it 

 is dark colored like setosus and platyurus, but is distin- 

 guished from the two latter ones by its partially distichous 

 tail and from all the other small sized Sciuropteri by its 

 different skull, especially by the peculiar shape of the 

 tympanic bullae. 



Description of the type-specimen, an adult male (in spirits) : 



Hairs of back black , each hair with a terminal chestnut 

 band ; sides of parachute bordered with pure white ; under 

 surface of body and of parachute pure white, cheeks and 

 sides of neck with a brownish orange tinge. Hairs of tail 

 of a fine chestnut, lighter towards the base of the tail. 

 Generally the hairs are very soft and rather long. 



The tail is partially distichous , namely only its under- 

 side is distichous. All the hairs of the tail from its root 

 to its tip are exactly of the same length. 



No cheekbristles , nor bristles at the base of ears. Whis- 

 kers black. 



Dimensions in millimetres : 



head and body 100 



tail with tuft 110 



hindfoot 21 



ear 12.5x4 



1) Sciuropterus aurantiacux is very rare in zoological collections. It has 

 been described in 1843 by Wagner, Schreber's Siiugethiere , Suppl. Bd. Ill, 

 p. 225, after a specimen in the Wiirzburg Museum, with the habitat Banka. 

 I refer to Wagner's exact description. In the Leyden Museum Sc. aurantiacus 

 is represented by a stuffed specimen and a skeleton , both from Banka, and 

 presented in 1863 to our Museum by Mr. v. d. Bossche. 



Notes from the Leyden Museum , "Vol. XII. 



