new Mammals from French Indo-China and Siam. 99 
12. Rattus sabanus revertens, subsp. n. 
Coiour asin. R. sabanus vociferans (Miller) of Peninsular 
Siam, but hind foot with a narrower dark median stripe. 
Below ivory-yellow (one ex. juv., white). 
Skull with nasals longer and more truncate Rasistaniy: 
ending level with the premaxillary sutures, not pointed and 
falling short of them, with the frontals penetrating between 
the premaxillaries ; fronto-parietal suture much more curved. 
Type.—Male, vix ad. (skin and skull), collected at Daban, 
Phanrang Province, South Annam, 650 ft., on 15th March, 
1918, by C. Boden Kloss. No. 8219/CBK. 
Specimens examined.—Four from the type-locality. 
Remarks.—This form has a closer resemblance to R. s. 
vociferans than to the geographically-intermediate and more 
adjacent race R. v. herbert, Kloss, of East Siam. 
For measurements see table on p. 98. 
13, Rattus moi, sp. n. 
Pelage very soft, close, and velvety, owing to the total 
absence of spines and piles; on this account not blackened 
as in Rattus surifer koratensis, Kloss, which occurs in the 
same region ; also more richly coloured above. 
Upper parts ochraceous orange, brightest on the middle- 
back, lightest on sides and fore limbs ; head tinged with 
greyish wood-brown ; median hne and mid-back, where many 
of the hairs have dark tips, slightly speck'ed with blackish. 
Under parts of body and limbs white, sharply margined, 
and narrowly continuous to the feet ; muzzle brown, lips and 
post-vibrissal area white. ‘Tail bicoloured with a white tip, 
scutes exceedingly small, 19-20 rings to the centimetre. 
Extreme base of tail below clad with hair like that above. 
Skull of the same general type as that of R. s. koratensis, 
but separable by narrower infraorbital foramina, owing to 
the more vertical position of the plates, larger interparietal, 
much larger palatal foramina, and less truncate interpterygoid 
space; rostrum markedly shallower, but the incisors more 
prominent laterally. 
Type.—Adult female (skin and skull) collected at Arbre 
Broyé, Langbian Mountains, South Annam, 5400 ft., on 
13th May, 1918, by C. Boden Kloss. No. 3588/CBK. 
Specimens examined.—T wo from the type-locality. 
For measurements see table on p. 98. 
