—— ss 
new Mammals from French Indo-China and Siam. 97 
Skull with interpterygoid space and basioccipital a little 
narrower ; bulle a little more dilated; foramen magnum 
nearly circular in outline, not flattened and oval. 
Type.—Adult male (skin and skull) collected on Langbian 
Peaks, South Annam, 5500-6500 ft., on 28th April, 1918, 
by C. Boden Kloss. No. 3556/CBK. 
Specimens examined.—Two from the type-locality and three 
from Dalat, Langbian Mountains, 4500 ft. 
17. Rattus molliculus, sp.n. 
Superficially resembling immature examples of the Annam 
country rat, Rattus rattus sladeni (Anderson), but the upper 
parts totally devoid of spines, the feet paler, and the under 
parts varying from pure white to buffy white with visible 
grey bases to the hairs. Mamme 2—3=10 instead of 
3—3 = 12 as in sladeni. 
Skull remarkably like that of R. 7. sladeni, but much less 
robust, especially more slender throughout. Infraorbital 
foramina larger, most noticeable when viewed from above ; 
bullz larger and more dilated and more nearly paralleled. 
Above “sayal”’? brown to buffy brown (Ridgway), 
streaked with blackish, paler and greyer on sides of head 
and body and on the limbs. Hind feet white, fore feet only 
a little paler than the forearms. 
Under parts varying from fur with grey bases and creamy 
tips in the older animals to pure white in the younger. 
Tail dark throughout,-but generally clad beneath proxi- 
mally with short silvery hairs: about 13 rings to the 
centimetre at mid-length. 
Type.—Female vix ad. (skin and skull), collected at Daban, 
Phanrang Province, South Annam, 650 ft., on 23rd March, 
1918, by C. Boden Kloss. No. 38267/CBK. 
Specimens examined.—Seven from the type-locality, one 
from Ban Na Kham, 1150 ft., North Siam (27 miles east of 
Outeradit), and one from Ban Tuoi, Laos, just below Pon 
Pissai on the Mekong. 
Remarks.—Though superficially so like immature A. rattus, 
this animal has nothing to do with that species and, knowing 
no other to which to refer it, we must regard it as quite 
distinct. 
For measurements see table on p. 98. 
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Ann, & Mag. N. Hist. Ser. 9. Vol. ix. 7 
