FASCICULI MALAY FUSES 
The skulls of the two species are easily distinguishable ; that of the 
present species being larger and more robustd The nasals are longer and 
broader at their anterior extremity, and the muzzle slightly more compressed 
laterally, especially noticeable when viewed from the under side. The 
postorbital processes are shorter and stouter, and do not taper to such a fine point. 
The most conspicuous and easily seen difference, however, is in the posterior 
nares, which, in the present species, are much broader and practically uniform 
in breadth throughout their length, whereas in Sc, vittatus^ apart from being 
always narrower, they tend to contract posteriorly. 
I append the average measurements of a series of six skulls of nigrovittatus^ 
as compared with a series of eight of vittatus : — 
T ^ncrth Length of palate Zygomatic Interorbital Length of Greatest breadth 
® from henselion breadth breadth nasals of post, nares 
Sc, nigrovittatus. 50*7 mm. 21*5 31 17+ 5*6. 
{48-52) (23-20) (29-32) (17-18) (14-16) (5-5-6) 
Sc, vittatus 48*5 mm. 20*8 28*8 174- 13-5 4-3. 
(48-49) (20-5-21) (28-29) (17-18) (13-14) (4-5) 
‘ In the East Coast States this species occurs under precisely the same 
conditions as S. vittatus,, but in Perak, so far as our observation goes, it is 
never found in the villages and ranges higher up the mountains. A specimen 
shot at Telom seemed to us a bulkier, more heavily built, animal, though there 
was little real difference in the measurements.’ 
43. Sciurus robinsoni sp. nov. 
(Plate I). 
General appearance similar to Sciurus lowii^ Thos., from Borneo, but 
rather smaller. 
Colour above a uniform grizzled black, and rufous becoming rather 
greyer and lighter on the flanks and sides of the face. Each hair is dark at 
its base, and has one or more rufous annulations and a black tip. Under parts 
and inner sides of the limbs buffy white, with a tendency to rufous on the 
hind limbs. Ears short and covered with short hairs similar in colour to the 
back. Muzzle, and a narrow stripe under the eye, fulvous. Tail above, similar 
in colour to the upper parts, but with light tips to the hairs, below rufous. 
Skull, Similar in general shape and conformation to that of S. lowii,, but 
much smaller, and the muzzle relatively rather shorter and narrower. On the 
under side the bony palate extends well back beyond the last molar, which is 
not the case with S, lowii^ and the bullae are more flattened and rounded, and 
do not project so far downwards. The molar series is very much shorter and 
smaller, but the incisors are about the same size. 
I. This exactly controverts the conclusion I came to before. My former remarks were, however, chiefly 
based on imperfect Javan skulls, whereas these must be considered as applying to the Mainland race. 
