32 S 31 r. 0. Tlionias on new 



lilackciU'il along the dorsal area, turning to lufous on tlie 

 runip. Under surface greyish throughout, the hairs every- 

 where slaty at base, greyish white terminally, not tinged 

 with buffy. Head markedly greyer than body. Ears 

 brown. Hands and feet finely iiaired, whitish; the digits 

 almost naked. Tail decidedly shorter than the head and 

 body, practically naked, the hairs as minute and i^w in 

 number as in U. levipes; in colour the tail is blackish brown 

 above and white or whitish below for its whole length. 



iSkuU peculiarly broad, low, and flat, the height from the 

 molars to the supraorbital edges nearly 2 mm. less than in 

 either Moncktoni or leoipes. Interorbital space broad, flat, 

 square-edged, liudimentary processes preseiit at the antero- 

 external corners of the brain-case. Palatal foramina luirrow. 

 Bullae small. 



Dimensions of the type (measured in skin) : — 



Head and body about 14:4 mm.; tail 116; hind foot 30; 

 ear 15. 



Skull: greatest length 37; basilar length 29'1; greatest 

 breadth IS'5; length of nasals 12'7 ; interorbital breadth 6; 

 breadth of brain-case 14"7; height of muzzle behind incisors 7; 

 height of supraorbital edge above palate behind in^ 8*2 ; 

 palatilar length 17; diastema 10 ; palatal foramina 5 ; length 

 of upper molar series 7. 



Ilab. Head of Aroa River, S.E. British New Guinea. 



Tijpe. Adult male. B.xM. no. 5. 11. 28. 18. Collected 

 2.5th April, 1905, by Mr. A. S. Meek. Two specimens. 



This species is allied only to U. levipes and U. Moncktoni. 

 From the first it differs by its much shorter hind feet, from 

 the latter by its clear greyish belly and naked tail, and from 

 both by its unusually low skull. The height of the skull 

 from the outer posterior base of ?/i' to the supraorbital edges 

 is in U. levipes 10*1 mm. and in U. Moncktoni 9"Dj as 

 compared witli 8"2 in U. platyops. 



Uromys gracilis, sp. n. 



A medium-sized species with a long tail and narrow skull. 



{Size about as in U. >Sta/keri. Fur long and close; hairs of 

 back about 11 mm. in length. General colour above uniform 

 cinnamon-brown, the sides rather brighter and lighter than 

 the back. Under surface pure white (the hairs white to the 

 roots) on the throat, chest, middle line of belly, and in the 

 inguinal region, but the hairs are slaty at base along the 

 sides of the belly. Head rather greyer than the back. Ears 

 bhort, thinly haired, brown. Hands and feet almost naked. 



