LÖNNBERG, MAMMALS FROM BRIT. E. AFRICA. 7 



Irrespective of age and sex some specimens have the 

 yellow rings of tlie hair of the back more pronounced, and 

 by this a stronger greenish lustre is produced tban in such 

 cases as when the rings are more whitish. Tf the påle rings 

 are narrow the general colour is much darker tban other- 

 wise. In the tail as well, the amount of yellow is much 

 variable. In some cases the subterminal portion of the hair 

 of the tail is very broadly and vividly ochre yellow, and 

 such bairs appear always to be new, while other bairs even 

 perhaps in the same specimen are white, or at least whitish. 

 Such bairs may in some cases be worn and bleached, but 

 in others they look quite fresh. The lower side of the tail 

 is always much more yellow tban the upper, and in some 

 cases the black and yellow rings of the bairs form very 

 conspicuous transverse bars across the lower side of the tail, 

 while in others no such bars are discernible. 



The lower side of the body is also differently coloured 

 in different individuals. Throat and chest are palest, in 

 most cases »Naples yellow» (Dauthenay, Rép. de coul. 29, i 

 and 2), but sometimes »honey yellow» (1. c 35,i). The co- 

 lour of the belly and the inside of the legs is somewbat 

 more saturated honey yellow, or *yellowish tan» (1. c. 315,i), 

 or even »ru ochre» (1. c. 314, 1). The genital region is often 

 more richly coloured. 



The bind feet are always brightly coloured from »yel- 

 lowisb tan» (1. c. 315,i) to »Mars yellow (1. c 316,4). The 

 före feet are always much less brightly coloured, usually in 

 some dull shade of »yellowish tan». 



The following measurements of five skulls show the cra- 

 nial dimensions. 



c^ c^ ef ? ? 



Maximum length of skull . 41,5 mm. 40,5 mm. 42,8 mm. 40 mm. 40 mm. 



Condyloincisive length . . 36,4 » 36,8 » 37,9 » 36 » 35,6 » 



Zvgomatic width . . . .23,1 » 22,5 » 23,3 » — — 



Least interorbital width . 12,4 ^ 11,1 » 11,6 » 11,2» 11,4» 



Upper molar series ... 7,4 » 7,6 » 7,3 » 7,5 » 7,5 » 



Length of nasals .... 11,5 » 10,5 » H » 10,6 » 11.3 * 



At another opportunity^ I have said that it is difficult 

 to maintain the Nairobi Scrub-Squirrel, Paraxerus jacksoni 



1 Mammals coll. Brit. E. Afr., K. Sv. Vet. Akad. Handl., Bd. 48, n:r 5. 



