of the Ratufa (Sciurus) bicolor Group. 495 



The remaining species can be easily distinguished from the 

 foregoing by certain well-marked characters. They are all 

 slightly smaller than R. bicolor. The tail is markedly 

 distichous and its hairs light at their bases. The skull is 

 narrower in proportion to its length and the supraorbital 

 processes well developed ; the basioccipital processes are 

 small and laterally flattened, they hardly bend inwards, and 

 do not end in a knob as in the larger species. Except in 

 size, the skulls of this latter group do not differ much among 

 themselves. 



Ratufa affinis typica (Raffles). 

 Sciurus affinis, Raffles (nee Horsf.), Linn. Trans, xiii. 1822, p. 259. 



General colour above, including head and outside of feet, 

 light brown or " cafe-au-lait," bleaching to light yellow, each 

 hair when newly grown having a faint subterminal annulation 

 of yellowish. Underparts pure white. 



Dimensions (from skin) : — 



Head and body 330 millira. ; tail 375 ; hind foot 70. 



Skull : zygomatic breadth 39 ; greatest length of nasals 20 ; 

 length of palate from henselion 25. 



Hah. Singapore and Joliore. 



Kaffles's description, which agrees closely with several 

 specimens in the Museum from Johore, was made from a 

 specimen from Singapore collected by M. Diard, when 

 writing a paper on some of the latter's specimens from 

 Sumatra. This is further evidence that the true locality of 

 R. a^nis aureiventerj the next species, is Malacca. 



Ratufa affinis aureivenfer (GeofFr.). 



Sciurus aureiventer, Is. Geoffr., Gu6rin, Mag. Zool. 1832 ; Is. Geoffr. 

 Voy. Ind.-Orient. Bt5langer, p. 150 (1831) ; Coulon, M6m. de la Soc. 

 Sc. Nat. de Neuchatel, vol. i. 1835, p. 123, pi. ix. 



Resembles the foregoing in all points, but is slightly 

 smaller and the underparts are of a yellowish orange. 



Dimensions (from skin) : — 



Head and body 336 millim. ; tail 400; hind foot 70. 



Skull : greatest breadth 40 ; greatest length of nasals 18*2 ; 

 length of palate to henselion 27. 



IJab. Described from Java. All specimens in the Museum 

 come from the Malay Peninsula from Penang to Malacca. 

 It does not apparently overlap the preceding form. 



This species was named from a specimen collected by 

 M. Diard in Java ; the plate, however, agrees so exactly 

 with specimens in the Museum from Malacca that there is 



