new }famniaJ>i from East Africa. 653 



Size al)ont as in somalicia, tail a\'^tM'ai:;iii[;; about 110 mm. 

 in longtii. Fur thick and lou^. General cjlour ot' dorsal 

 surface very like that of so7Ha/icn!>, rather more bufty and 

 without the greyish wash present in the Souiali species. 

 Flauk3 ])urer and yellower in colour. Head rather lighter, 

 especially on the frontal region. Backs of hands and feet 

 white. Unuerpaits white, hairs almost white to roots, the 

 extreme bases of the hairs alone being greyish ; in somalicus 

 the entire basal halves of the hairs are slate-black, giving the 

 belly a greyish appearance. Tail as in sonuilicus. 



8kull rather large, with long nasal and palatal regions. 



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



Head and body 126 mm.; tail 145; hind foot 34*5; 

 ear 2o. 



Skull : greatest length 37 ; condj-lo-incisive length 34'2 ; 

 zygomatic breadth 20"5 ; interorbital constriction 6; squa- 

 mosal breadth across brain-case 16 ; greatest length of nasals 

 15; palatilar length 1*J'5 ; length of upper tooth-row from 

 front of first incisor to back of last molar 1S"9. 



JIah. Orr Valley, Mt. Nyiro. Altitude 3500 feet. 



Type. Old male. Original number 435. Collected on 

 April 3rd, 1911. 



The almost pure white hair on the ventral surfase of the 

 body readily distinguishes this new form from the Somali 

 species, while the cranial differences, noted above-, appear of 

 specific value. 



Paraxerus percivali, sp. n. 



(J. B, D, 252, 263, 230 ; ? . 253, 258, 2G6, 267, 271, 

 317. Marsabit. 



Related to jacksoni, de Wint., but smaller in size and 

 with dorsal surface of body dark blackish olive in colour. 



Skin dimensions rather less than in jacksom. General 

 colour of back yellowish olive, with a dark blackish suffusion 

 down the middle of the body, extending from the top of the 

 head to the rump and spreading on to the tail. Flanks and 

 shoulders brownish olive speckled with yellowish white ; 

 light side stripes faintly defined. Forehead blackish speckled 

 with yellow ; sides of face, muzzle, and ocular markings dingy 

 greyish buff. Backs of hands and feet yellowish buff, in 

 this respect resembling jacksoni capitis^ Tlios. Ventral 

 surface of body very much as in jacksoni, the buff tint a trifle 

 richer and the grey bases to the hairs not quite so evideiit. 

 Tail rather blacker throughout; subterminal rings on hairs 

 pale yellowisli buff. 



