382 MR. C, BODEN KLOSS ON 
42. Bandicota siamensis, nov. 
Type. Adult male (skin and skull) No. 2218/CBK. Colleet- 
ed at Tachin, Central Siam on 23rd Oct., 1216. 
Characters, Pelage apparently resembling that of B. mordax. 
Thomas, from Chiengmai, N. Siam,* but skull broader with 
longer nasals ; toothrow shorter and m!' narrower. 
Colour. ‘Top of muzzle, occiput, orbital region and shoulders 
brownish-black, the under-fur being mouse grey to clove-brown ; 
from shoulders to rump the under-fur —neutral grey at base, hair- 
brown at tip— is overlaid by long glistening brownish-black piles 
Which attain a length of 60-70 mm, on the rump. Fur of sides of 
head and body with neutral-grey bases and mouse-grey tips, thickly 
beset with (1) longer blackish hairs, and (2) longer butfy-white hairs 
with faintly indicated black tips ; the latter sort occurring to a much 
less degree on the dorsal region, Upper sides of fore and hind limbs 
blackish-brown with a few whitish hairs bordering the claws. 
Throat and lower cheeks nearly light neutral-grey, the gener- 
al colour effect of the remainder of the underparts mouse-grey 
slightly silvered by the whitish tips of many of the hairs. 
Tail dark brown, coarsely haired, with eight rings of scales 
to the centimetre at mid-length. 
Skall and teeth. The measurements of the skull show that 
it is somewhat broader than the type of B. mordax and has longer 
nasals. The teeth are smaller than in the latter where their large 
size, especially in breadth, is the main character on which the species 
is erected, 
As compared with the skull of an adult female of B, setifera 
(Horsf.) from Indramaju, Java, which is slightly smaller, the infra- 
orbital plate and the posterior root of the zygoma are narrower and the 
zygomatic space is larger; the palatal foramina are more narrowed 
posteriorly and the bullae are noticeably smaller; the nasals are 
larger; the teeth are not so broad and the upper rows exhibit 
greater convergence anteriorly, 
* Journ. Bombay Nat, Hist, Soc., XXTV, p, 42 (1916), 
JOURN, NAL, HIST, SOC, SIAM, 
