MAMMALS OK BORNEO. 43 



SCIUROPTERUS HORSFIELDI. 



Ptcrojuys /ioi'sficldi\\\^2.ie.r\\ou'i:e. Proc. Zool. Soc. 18^7, 



^■^^- . . ' . . . 



This species, which is a Httle larger than S. ^n^ciiibtirbi's, is 



recognised by the rich, uniform rufous-brown colour of the fur 

 of the upper parts and tail, the latter being bright rusty 

 beneath, bushy and distichous. The margin of the membrane 

 and the sides of the face below the eye are reddish-yellow, and 

 the dorsal surface of the parachute dark brown. On the upper 

 surface of the body each hair is grey at the base ; and the in- 

 terspersed longer hairs, which are numerous, are bright brown 

 or reddish-yellow at their apices. The fur is dense and woolly. 

 On the under parts and inside of the limbs the hairs are 

 yellowish-white and not grey at their bases. Cheek-bristles 

 absent. 



Body - - - 9.00 inches. 



Tail - - - 8.25 



I have only obtained one specimen of this small flying squirrel, 

 which was shot near Claudetown. It is certainly very rare in 

 the Baram district. 



Hab. Baram river (E. Cox). Kuching (A. Everett). 



SCIUROPTERUS SETOSUS. 



Sciuroptcnis sctosiis^ Temminck. Faun. Japan. Mamm. 

 1847, p. 49. 



The type specimen, an adult female, was collected by 

 Horner in the neighbourhood of Padang, in Sumatra. Dr. 

 Anderson remarks in his work on the Zoology of Western 

 Yunnan, page 294, " that he has examined the type of 

 Ptcfoinvs sctosiis^ which agrees with Ptcromys pcarsoiui xw the 

 absence of cheek bristles and in the general characters, but 

 the specimen is not fully grown, measuring only, along the 

 back to the root of the tail, 4.75 and the tail 3.75. It is less 

 rufescent than the adult, and the under parts are whiter, as 

 are also the cheeks." 



On the other hand. Dr. F. A. Jentink in the Notes from 

 the Leyden Museum, Vol. xii. page 145, shows that they 

 are different species and gives the measurements of the skulls 

 of Schiropteruss etosiis and Scinroptcrus pcarsom'i in mille- 

 metres, both being adult specimens. 



Sciuropterus pearsonii. Sc. setosus. 



Length of skull 41 30 



Greatest breadth 27 17 



Nasals 13 5 7 



Palate 20 12 



Diastema q 6.5 



Length of upper molar series 10 5.5 



