342 MR. C. BODEN KLOSS ON 
mandibularis® from Koh Chang Id,, S. E. Siam; cristata from 
Sumatara ; pullufat from Bintang Id., Rhio Archipelago, ultimay 
from Borneo, and finally animals from the Federated Malay States. 
The latter seem to have a similar skull and exactly the same 
colour as ultima from which, on the series available, they can only 
be distinguished by the form of crest: this in Bornean animals 
grows backwards, coming to a point on the occiput, while in 
Malayan examples it is erect, forming a distinct tuft or ridge. The 
difference seems to be of no importance as, of two specimens of 
mandibularis, one has an upstanding tuft and the other has the hair 
on occiput and nape as in /oratensis but rather more lengthened. 
The range of the Malayan animal appears to be very limited, as it is 
only known from the stretch of coast between Penang and Malacca 
on the west side of the Peninsula. 
P. pulluta was described as being darker than cristata and 
with smaller teeth. I have little doubt, however, that comparison 
was made with Malayan animals, which were sent home with it, 
and not with typical Sumatran individuals; for on comparing ex- 
amples of it with a specimen of the latter, the only difference I can 
detect is that the general colour-effect of the dorsal pelage is 
brownish black rather than greyish black as in eristutu. The fol- ~ 
lowing Key illustrates the differences shown by all these races as 
far as colour is concerned; the species becomes paler as it goes 
northward :— 
A. Blackish, only slightly silvery, base of fur 
greyish-black. 
a. whiskers blackish, only slightly tipped 
with silvery; throat blackish. 
a) darker colouring greyish-black DP. ¢. cristata, 
1 darker colouring brownish-black P. ¢ pullata, 
}. whiskers pale, nearly silvery through- 
out; throat pale grey. 
* Kloss, P. Z. 8., 1916, p 32. 
+Thomas and Wroughton, Ann. & Mag. Nat. Hist. (8) UL, 
p, 439 (1909). 
t Elliot, Proc. U. 8. Nat. Mus., 38, p. 351 (1910). 
JOURN. NAT, TLIST. SOC, STAM. 
