new Mummah from British New Guinea. To 



colour coarsely mixed ii,rey- brown, becoming- bistre on the 

 middle back and rufous or burnt-umber oi the rump. When 

 first appearing- the hairs of the fore-back at least are really 

 grey, that is ringed with black and white, but owing to the 

 bleaching- of the black to brown, and of the white to buffy 

 white, the general tone soon approaches bistre. Under 

 surface mixed brown and whitish, without sharp line of 

 demarcation, most of the hairs brown with whitish tips, but 

 a certain number along the median area white to their bases. 

 Muzzle and chin dark brown. Ears short, naked. Arras 

 grizzled brown, like body, the inner aspect rather lighter ; 

 upper surface of hands reddish brown. Hind legs dark 

 rufous, becoming- b: owner on the metatarsals; toes naked, 

 except for the few brown hairs at the roots of the claws. 

 Tail long, of the usual Uromys structure, wholly black, 

 except for the short basal furry portion, which is deep 

 reddish. 



Skull large and heavy, but otherwise as in the otiier 

 members of this group. The molar series markedly longer 

 than in any other species. 



Dimensions of the type (measured on the skin) : — 



Head and body 310 mm. ; tail 400 ; hind foot (wet) 69 ; 

 ear (wet) 24. 



Skull: palatilar length o8'5 ; nasals 27 X 8*6 ; interorbital 

 breadth lO'o ; diastema 23*5 ; palatine foramina 7'3 ; upper 

 molar series (crowns) 14'2. 



Hab. Ifogi, Brown River, N.E. British New Guinea. 

 Altitude " not less than 4000 ft." 



Type. Old male. B.M. no. 7. 5. 22. 2. Original number 27, 

 Collected 2nd October, 1906, and presented by C. A. W. 

 Monckton, E>q. 



'' Iris dark brown. Native name ' Felek.' A ground 

 animal, living in burrows, though occasionally found in the 

 hollow of a leaning tien."— 0. A. W. M. 



Under the names of Uromys validus *, Ilapcdotis papuanusf, 

 and Mas harhatiis \, three members of this group of the genus 

 have been described from South-eastern New Guinea, though it 

 is possible that all of these name?, or either two of them, may 

 be synonymous with each other. I have examined the types 

 of the first and third, and find that their upper molar series 

 measure 11'3 and 11 mm. respectively, and each of these has 

 the terminal portion of the tail yellow. 



The case of ^^Ilapalotis papuanus'^ is not so cleav,for nothing 



* Peters & Doria, Ami. Miis. Geuov. xvi. p. 703 (1881). 

 t Ramsay, P. Linn. Soc. N.S.W. viii. p. 18 (188-3). 

 X Milue-Edwards, Bull. Mas. FavU, 1900, p, 107. 



