654 Mr. G. Dullman on 



Skull like that oi jacksoni, but smaller, with shorter nasals 

 and smaller cheek-teeth. Auditory bulhe less inflated. 



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



Head and body 155 mm. ; tail 160; hind foot 36 ; ear 18. 



Skull : greatest length 40*5 ; condylo-incisive length 36 ; 

 zygomatic breadth 23'5; interorbital constriction 11 ; squa- 

 mosal breadth of brain-case 18 ; length of nasals lO'o ; 

 greatest width across nasals Q'6 ; palatilar length 15"8 ; 

 length of upper tooth-row 7. 



IJab. Marsabit. Altitude 4500 feet. 



Ty^pe. Adult female. Original number 253. Collected on 

 February 16tli, 1911. _ _ 



The affinities of this species are not easy to decide ; it 

 seems to be rather intermediate between the jacksoni and 

 ochraceus groups. From jacksoyn it is distinguished by itd 

 rather smaller size and the dark blackish suffusion on the 

 dorsal surface. 



The very much darker colour of tlie fur is sufficient to 

 separate this species from all the forms of ochraceus. Para- 

 xerus kahari, recently described by Heller from Meru Boma, 

 appears to be related to this new Marsabit species, from 

 wliicli it is distinguished by its larger size and more butly 

 coloration. 



Paraxerus ochraceus augimtus, subsp. n. 



S . C, 264, 279 ; ? . A, 265, 316. Marsabit. 



A pale yellow-coloured form allied to P. ochraceus, 

 Huet. 



Size as in aruscensis. General colour of dorsal surface 

 pale yellowish buff grizzled with brown and grey, the brown 

 tint most conspicuous on tlie hinder part of the back. Light 

 lateral stripes almost entirely invisible. Shoulders pule 

 yellowish buff; flanks pale greyish buff, faintly speckhd 

 with brownish grey. Top of head similar in colour to back, 

 general effect greyish olive. Muzzle and sides of face white, 

 washed wiih pale buff. Eyes Avitii narrow white lines above 

 and broad white markings below. 



Backs of hands and feet yellowish buff, paler than in 

 ochraceus. Under surface of body creamy white. Tail as 

 in ochraceus. 



Skull larger than in ochraceus, nearly equal in size to that 

 of aruscensis. 



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



Head and body 150 mm.; tail 160; hind foot 3S ; 

 ear 19. 



Skull: greatest length 40*2; condylo-incisive length oG ; 



