MuiiJie /"rom Biitlsh luist Africa. 541 



Type. Adult female. lliuM Collection. Oripjiiial nuniljer 

 l.'J4. CoUcct.a In- Mr. Kemp, 25th Au;rust, ISiOO. 



Seven specimens examined, viz. two from Miimias (4.'>00'), 

 five from Kirui (tJOOO'). 



AVliiJe comparing; the specimena of ^[us medicalii.t with 

 tliose lal)elle<| .1/. hindft^ I touiid, anKHii^st these latter, threo 

 B|)ecimens which seem to me quite distinct troin both these 

 species. 



Mus norce, sp. n. 



A rat allied to and of the size of JA. ineJirutmi, and, like 

 that species, iliffcring from J/, hindei by the greater length of 

 its tail in piojwrtion to its body. 



Fur soft and silky, longer than in .1/. medicuhis, 18-20 mm. 

 otj back. Colour pattern quite as in the Elgon species, but 

 ]»aler, the ground-coluur being quite a pale buff instead of the 

 " salmoii-bulf " of medi'calun. 



Skull smaller than in medicatusj about as in hindei, teeth 

 slightly larger than in the former, much larger than in the 

 latter, bullae smaller even than in hindei. 



Dimensions of the type : — 



Head and bo<ly 170 mm. ; tail 16G ; hind foot 2^:) ; ear 20. 



ISkull : greatest length 38'5 ; basilar length '61 ; greatest 

 breadth li>; nasals 17"5; interorbital breadth 5*5; brain- 

 case breadth 15"5 ; diastema 10"5 ; upper molar series 6*6. 



Jlab. Guasa Narok, Upper Guaso Nyiro, Biit. E. Africa. 



Ti/pe. Adult male. B.M. no. 6. 7. S. 11. Original num- 

 ber :iO. Collected by ^Irs. Holms Tarn, 16th December, 

 IDO."), and presented to the National Collection. 



Three specimens. The long loose coat and pale colour are 

 characteristic. 



Dendromus acrteus, sp. n. 



A Z?€nt/ro;/JJ/« of the pMmiYio group, with the dorsal stripe 

 well marked, as in iJ.jamesoni, black lines joining the eyes 

 to the point of the nose, forming a V-shaped mark. 



Fur sott and silky, 5-7 mm. long on back. General 

 colour above near ochraceous buff', so modified, in a dry 

 specimen, by the slaty bases showing through, tlwit it seems 

 near " russet " ; individual liairs (exclusive of some scattered 

 longer black hairs) dark slate, with buff tips at most 2 mm. 

 long. Buff colouring purer on flanks, fading gradually into 

 the pure white belly, in some specimens tinted with Imffs on 

 the chest and lower tliroat. Face daik like back j cheeks and 



