neto Mammals from French Indo-China ami Siam. 05 



12. Ruttus sabanus revertens, subsp. n. 



Colour as in R. sabanus vuciferans (Miller) of Peninsular 

 Siani, but hiiul foot with a utirrower dark median stripe. 

 Below ivory-yrllow (one ex. juv., white). 



Skull with nasals longer and more truncate posteriorly, 

 ending level with the premaxillary sutures, not jjointed and 

 failing short of them, witii the frontals ])enetrating between 

 the premaxillaries ; fronto-parietal suture much more curved. 



Type, — Male, vix ad. (skin and skull), collected at Daban, 

 Plianrang Province, South Annani, 650 ft., on 15th March, 

 11)18, by C. Boden Kloss. No. 3219/CBK. 



Spechnens examined, — Four from the type-locality. 



R-niarks — This form has a closer resemblance to R. s. 

 voc'iferans than to the geographically-intermediate and more 

 adjacent race R. v. Herbert, Kloss, of East Siam. 



For measuiements 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 Ruttus 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 line and mid-back, where many 

 of the hail's have dark tips, slightly speck ed with bla(kish. 



Under parts of body and limbs white, sharply margined, 

 and narrowly continuous to the feet ; muzzle brown, lips aud 

 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 i?. s. koratensisy 

 but separable by narrower intraorbital foi'amina, owing to 

 the more vertical position of the plates, larger interparietal, 

 much larger palatal foramina, and less truncate iuterpterygoid 

 space; rostrum markedly shallower, but the incisors more 

 prominent laterally. 



Type. — Adult female (skin and skull) collected at Arbre 

 Broye, Langbiau Mountains, South Annam, 5400 ft., on 

 13th May, 1918, by C. Boden Kloss. No. 3588/CBK. 



Specimens examined, — Two from the type-locality. 



For measurements see tabic on p. 98. 



