OLDFIELD THOMAS AND E. C. WEOUGHTON— MAMMALIA. 513 



brownish-white. Tail long, slender, almost naked, markedly less hairy than in the 

 other species; blackish above, whitish flesh-colour below. 



Skull with a long slender muzzle ; interorbital region broad, edged with well- 

 defined ridges, but without postorbital projections ; outer wall of anteorbital foramen 

 reduced to a narrow bar less than half the breadth of the corresponding part 

 in L. aquihts and L. Jlavopunctatus ; it is, however, similarly narrow in the West- 

 African L, sikaxmsi. 



Incisors more as in Mus than in other Loplmromys, their anterior surface not 

 curved round in the way generally characteristic of the present genus. Molars very 

 broad, with well-defined cusps ; their pattern as usual. 



Dimensions of the type (measured in the fiesh) : — ■ 



Head and body 118 mm. ; tail 111 ; hind foot 22-5 ; ear 23. 



Skull: greatest length 30'5 ; basilar length 24; greatest breadth 14-3; nasals 

 14x3'2; interorbital breadth 6"7 ; diastema 8; palatilar length 12'4 ; palatine 

 foramina 6"5 ; length of upper molar series 4'S. 



Type. Adult male. B.M. no. 6.7.1.170. Original number 608. Collected olst 

 December, 1905, by Mr. E.. B. Woosnam. 



This striking species is widely different from any of the Central- and East-African 

 forms of LopJmromys, and might almost be considered generically distinct were it not 

 that the West- African L. sikapusi also possesses some of its characters. Its large ears, 

 long tail, and peculiar olive-coloured white-speckled fur readily distinguish the species 

 from all its allies. 



[Not uncommon on Euwenzori, but only obtained up to an altitude of 8000 ft. 

 They inhabited both the forest and grass-country. Both this species and L. aquilus 

 have a curious odour, quite unlike that of other mice. — R. B. W.] 



75. Dasymts montanus Thos. 



?.79, 654. ?.S0, 255. Mubuku Valley, E. Ruwenzori. 12,500 ft. 



2 in spirits. Mubuku Valley, E. Euwenzori. 12,500 ft. 



A very long-haired species, with short tail. 



Size medium. Fur very long and fine ; the ordinary hairs of the back about 15 mm. 

 in length. General colour above uniformly finely speckled mummy-brown, the light 

 rings on the hairs near clay-colour. A number of the longer hairs with a greenish 

 iridescence. Sides but little paler than back. Under surface bluish-grey, the slaty 

 bases of the hairs little hidden by the dull pale drab tips. Ears large, black, con- 

 trasting with the general brown colour. Upper surface of hands and feet pale brown, 

 the digits lighter. Tail practically naked, the scales quite unhidden, blackish 

 throughout. 



Skull shorter and broader and the zygomata more squarely expanded anteriorly than 

 in other species. 



VOL. XIX. — PART V. No. 67. — March, 1910. 3 Y 



