74 MR. C. BODEN KLOSS ON 
[ Colour otf soft parts. Nose, liver brown; feet, black; genital 
skin, white. Mammae, 2 pairs only found. Pads of hind-feet, 33 mm. 
in width. K. G. G. }. ‘ 
Measurements. Head and body, 610; tail, 575; hindfoot, 74; 
ear, 50 mm. Of the skull I am unable to give any details as it was 
carried off by some animal while drying: it probably possessed no 
characters that would differentiate it from neighbouring races. 
Remarks. Animals from South Tenasserim and Bandon, Penin- 
sular Siam, connect this race with robusta Miller, from Trang *; they 
are not so dull as vagans but less fulvous and buffy than the other, and 
the nape stripe is faintly indicated: they do not appear distinct enough, 
however, to justify the bestowal of a name. 
2. Rattus griseiventer rahengis, subsp. nov. 
T'ypes. Male vix ad. and female al. from Me Taw, 40 miles 
N. W. of Raheng, W. Siam, 1500 ft [Nos. 2637, #/CBK]. Collected 
by Mr. K. G. Gairdner on 2 Feb. 1917. Orig. Nos. 459, 460. 
Characters. Differs from Rattus griseiventer (Bonhote) in being 
more woolly (less spiny) and much darker above ; hands and feet white 
throughout, not largely brown. Mamme 3—-3=12. 
Colour. Above dark brown grizzled with ochraceous tawny, 
sides and limbs greyish brown; under-parts neutral grey washed with 
creamy in the male, with pale buff in the female. ‘ail dark throngh- 
out: ten rings to the centimetre at the middle. 
Shull and teeth. Compared with that of I. g. grisetventer, the 
skull has the nasals much longer, pointed posteriorly and extending 
backwards well beyond a line joining the front borders of the orbital 
spaces ; bullae smaller, less dilated and narrower: the teeth larger. 
The palatal foramina extend abont .5 mm, behind a line joining 
the roots of the molars, the tooth rows diverge posteriorly and the 
front edge of the anteorbital plate is convex and overhangs the base 
(considerably in the female). 
Remarks. I have referred these animals to R. griseiventer 
(Bonhote) but it should not necessarily be inferred that I regard the 
latter as the true superform of the species to which both belong: they 
* Paradovurus robustus Miller, Proc. Biol. Soc. Washington, xix, p. 26 
(1906). 
JOURN, NAT. HIST, SOC, SIAM. 
