428 Mr. 0. Thomas on 



9. Uromys cerosus, sp. n. 



c?.6,22; ?. 4,26,28. Mount Manusela. 4000-6000'. 



A middle-sized very dark-coloured species. 



Size about as in the larger ordinary members of Uromys, 

 exclusive of the giant species, e. g., as in hruijnii, moncktoni, 

 &c. Fur close and fine, hairs of back about 13 mm. in lengtli. 

 General colour above dark coppery brown (rather warmer 

 than ''mummy-brown"), somewhat variable in tone, often 

 becoming rusty on the rump. Under surface scarcely lighter, 

 the hairs dark slaty for tliree-fourtlis their length. Hands 

 and feet brown, a few lighter hairs on the wrists. Tail 

 shorter than head and body, naked, scaly, blackish brown. 



Skull of normal shajie, not specially broadened. Supra- 

 orbital edges sharply square, and in one case witli a tendency 

 to overhanging ledges. Palatal foramina rather long for tiiis 

 genus, nearly approaching the level of the front root of m^. 

 Hinder edge of palate level with the middle of m^. Molars 

 unusually large in proportion to the size of the animal, con- 

 trasting markedly with those of the other Ceram species in 

 this respect. 



Dimensions of the type : — 



Head and body 150 mm.; tail 138; hind foot 31; 

 ear 18. 



Skull : greatest length 38 ; condylo-incisive length 35 ; 

 zygomatic breadth 19; nasals 14*3 ; interorbital breadth 5*7 ; 

 breadth of brain-case 15"8 ; height of crown from base of m^ 

 10*5; ])alatilar length 16*5; palatal foramina 6"5 ; upper 

 molar series 7*8. 



Hab. as above. 



Type. Adult female. B.M. no. 20. 7. 26. 24. Original 

 number 26. Collected February 1920. 



This species is distinguished from any of the Papuan forms 

 by its dark colour, longer palatal foramina, and proportionally 

 heavy teeth. A young specimen of it was collected on 

 Mt. Manusela in 1911 by Mr. E. Stresemann, and was 

 presented by him to the British Museum. 



10. Uromys fraterculus, sp. n. 



S . 10, 23. Mt. Manusela. GOOO'. 



" In thick jungle." 



Size small. Fur long and thick, hairs of back nearly 

 15 mm. in length. General colour above as in the great 

 mass of the Papuan species, a dull rufous, greyer on the 

 head, richer on the rump. Under surface soiled buffy, the 



