Mammals from Mount Ruioenzon'. 1 1 1 



liairs black at base and on a broad subterminal ring, tlie 

 middle ring and tlu! ends greenish yellow; a pencil of long 

 hairs at tlie tip of the tail wholly black. 



Skull of about the size and general shape of that o£ 

 F. erjilhrogemjs and other members of tlie pyrrhopus group. 

 Nasals square, parallel-sided. Postorbital processes further 

 forward on the skull than in erytlirogenys. Teeth apparently 

 of the same general type as in F. erythrogenys^ but m^ 

 considerably larger. 



Dimensions of the type (measured in flesh) : — 



Head and body 198 mm. ; tail 192 ; hind foot 47-5 ; ear 20. 



Skull: greatest length 49; basilar length 38; greatest 

 breadth 28; nasals lJ3x7'5; interorbital breadth 12-2; 

 palatilar length 20"2 ; length of upper tooth-series exclusive 

 oip' 8-8. 



Another specimen (a male) has head and body 204 mm. ; 

 tail 205. 



Hah. Ruwenzori East, G500'. 



Type. Female. B.M. no. (). 7. 1. 53. Original number 262. 

 Collected 7th February, 1906, by Douglas (Jarruthers. 



The affinities of this handsome and distinct species are by 

 no means clear. Its size and the indistinct lateral dorsal 

 lines suggest a relationship to the non-rufous members of the 

 pyrrhopus group, although it has not their characteristically 

 marked tail, and the bluish-grey belly is unlike anything 

 found among them. 



7. Otomys Dartmouthi, sp. n. 



Lower incisors double-grooved, il/^ with only six laminae. 



Size rather larger than in 0. Jachsoni. Fur very fine, 

 long and woolly ; ordinary hairs of back about 17 mm. in 

 length. General colour above finely grizzled " mummy- 

 brown/' not so coarsely marbled as in 0. Jacksoni. Under 

 surface drab-brown, the ends of the hairs pale clay-colour. 

 Head and ears of the prevailing body-colour. Upper 

 surface of hands and feet pale butfy. Tail black along its 

 upper surface, dull buffy on the sides and below. 



Skull larger than in 0. Jacksoni, its profile convex above 

 the orbits. 



Upper incisors with a deep median and a tine internal 

 groove. Lower incisors with two well-marked subequal 

 grooves, as in 0. Jacksoni and typus. Laminar formula of 



1 , 3—2—6 



molars ^_.-,_^ . 



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



Head and body 150 mm. ; tail 93 ; hind foot 26*5; ear 25. 



Ann. (£■ Mag. X. Hist. Ser. 7. Vol. xviii. 11 



