208 Mr. 0. Thomas on new 



These appear to be both unnamed, and may be described as 

 follows : — 



Uromys nero, sp. n. 



Size very large, though less than in the giant U. anah and 

 rolhschildi. Fur harsh and thick, the under surface more 

 completely hairy than in the next species. General colour 

 above very dark, coarsely grizzled bistre, the median dorsal 

 area blackish, markedly darker than the sides. Sides of 

 cheeks and shoulders grey. Under surface pure white, 

 sharply defined laterally ; inner sides of limbs prominently 

 white. Hands and feet pale brown above. Tail practically 

 quite naked, a few isolated hairs, less than a scale in length, 

 perceptible with the help of a lens; its terminal third to 

 one-half prominently yellow all round, while the base also 

 is more or less yellow below, the usual black being thus 

 restricted to the upper side of the basal portion. 



Skull very large and powerfully built, larger and heavier 

 in proportion to the size of the animal and the length of the 

 feet than in any other species ; its shape normal, the forehead 

 not specially convex. Interorbital region smooth, faintly 

 concave, its edges sharp, but without distinct beading. 

 Posterior narial opening much broader than in the next 

 species. 



Dimensions of the type (measured in the flesh) : — 



Head and body 279 mm. ; tail 232 ; hind foot 56 ; 

 ear 30. 



Skull: greatest length 68'3 ; condylo-incisive length 63"7 ; 

 zygomatic breadth 36'5 ; nasals 25x8*5; interorbital 

 breadth 11 ; breadth of brain-case 25*5; palatilar length 36 ; 

 palatal foramina 8'2 ; width of mesopterygoid fossa 6 5 ; 

 upper molar series (crowns) 12"2. 



Hab. Utakwa River, at middle altitudes, type from 

 " Camp 3." 2500'. 



Type. Old female with worn teeth. B.M. no. 13. 6. 18. 13. 

 Original number 67. Collected 15th December, 1912, by 

 C. B. Kloss. Two adult and three young specimens 

 examined. 



This fine species differs from all hitherto-described forms 

 allied to it by its dark coloration, the result of the saturate 

 conditions in which it lives. While smaller in all lespects 

 than the giant black-tailed species U. anak and rothschihli, 

 it is larger, so far as regards skull, than any of the other 

 yellow-tailed forms. 



From its lowland neighbour U. scapliax it differs by its 



