SOME VISITS TO RATAM ISLAND. 69 



as traps specimens are always more damaged by ants 

 than any other kind. 



13. Mus sp. near rattus. The rats provisionally grouped 



under this heading are most perplexing. They fall 

 readily into two groups which handle in the flesh as 

 extremely distinct. The one division, almost black 

 above with whitish bellies, are finely built animals with 

 very pointed noses and closely resemble M. jarak, 

 Bonhote, from Johore. The others with greyish bellies 

 and backs rather like M. norvegicus are coarsely built 

 and muzzled and somewhat approximate to M. grise* 

 venter, Bonh., of Johore. All these were taken in 

 swampy ground near the sea as was Mus jarak which 

 I found only amongst mangroves. Mus griseiventer 

 however is a Kampong rat. 



14. Mus batamanus, Lyon. This new species is of the 



jerdoni type. It is a very beautiful shaped rat and 

 the only specimen I obtained was captured in damp 

 littoral forest. Swampy ground seems the habitat of 

 all this group. 



15. Mus musculus, Linn. Some specimens of the "tikus 



padi " were brought me by a Bugis boy who had cap- 

 tured them in his house. 



16. Sciuropterus, sp. Eeported; possibly the amcenus, Mil- 



ler of Kundur Island. 



17. Petaurista, sp. The " kubin " was said to occur. 



18. Ratufa, sp. Eeported. A yellow type, probably near 



R. insignis,. Miller , of Pulo Sugi. 



19. Sciurus vitto.tus, Baffles. Exceedingly common in the 



coco-nuts where it was very destructive. Cannot be 

 distinguished in any way from Sumatran and Penin- 

 sula forms. 



20. Sciurus tenuis. Raffles. Eeported as very rare. I only 



know of one specimen from the Archipelago, taken on 

 Lingga Island. 



R. A. Soc, No. 60, 1903. 



