NO. 1498. 



MAMMALS OF BANK A AND BILLITON—LYON. 



595 



MUS CREMORIVENTER Miller. 



Three rats of this group were collected on Banka and one on Billi- 

 ton. The,v are not appreciaV)ly different from Mas cremorlventer Mil- 

 ler, of the Malay Peninsula. The Banka specimens are not full^^ 

 adult; the scales on the tails are a little smaller and the teeth a little 

 larger than they are in the Billiton specimen. The material is too 

 limited for arriving at any positive conclusi-ons. For measurements, 

 see table page 51)5. 



ExleriuU and cranial measuronents of Mas Jirmu-'> and Miis croaorirenter. 



MUS NEGLECTUS Jentink. ' 



Doctor Abbott secured the young of a medium- sized rat at Tanjong 

 Poetak, Billiton, which may be referred to this species provisionall}'. 

 It is so 3'oung that the second molars are scarcely up. No rat of this 

 group was taken on Banka. 



MUS ASPER Miller. 



Good series of this species were obtained on both Banka and Billiton. 

 Considerable individual variation is seen in the color of the under- 

 parts. In some specimens it is almost entirely white or whitish gray, 

 while in others it is very completely washed over with ochraceous 

 buff. The series from the two islands differ in no way from each 

 other nor from specimens from the Malay Peninsula. See table of 

 measurements, page 596. 



