204 New Forms o/Cercopitheeus and Graphiurus. 



Skull very similar to that of C. Jcolbi, nasals rather shorter, 

 and orbits larger. 



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



Head and body 620 mm.; tail 650 ; hind foot 121 ; ear 27. 



Skull : greatest length 1)6 ; basilar length 63*4 ; condylo- 

 basilar length 70 ; zygomatic breadth 64 ; greatest width 

 across orbital region (at fronto-jugal suture) 53 ; greatest 

 diameter of orbit 24 ; breadth of brain-case (across squamosal 

 region) 54; length of nasals 12; palatilar length 30; width 

 of palate in front of last molar 21 ,* length of upper tooth- 

 row from front of first premolar to back of last molar 25. 



Hah. Nairobi Forest, British East Africa. 



Type. Adult female. 13. M. no. 0. 2. 1. 4. Original 

 number 4. Collected by Mr. H. J. Mackinder on July 14th, 

 1S99. 



The much duller colour of the dorsal surface, lighter under 

 parts, and less conspicuous white collar are the chief points 

 of distinction between this Nairobi form and the Kenia 

 specimens of G. Icolbi. 



Graphiurus microtis saturatus, subsp. n. 



A dark race of Graphiurus microtis, Noack. 



Size and general proportions very much as in G. microtis. 



Fur soft and of medium length, measuring about 7 mm. in 



length on the back. General colour of upper surface dark 



greyish brown (between ashy grey no. 4 and mouse-grey 



no. 4, 'Repertoire de Couleurs '). Individual hairs of back 



dark slate-grey, with yellowish brown tips. Flanks similar 



in colour to back. Sides of face, below eyes, white; hairs 



dark grey, with white tips. Eyes surrounded with dark 



brownish black rings, the dark markings extending forwards 



on to the nose. Backs of hands and feet covered with short 



white hairs. Under side of body grey, washed over with 



buffy white. Individual hairs of belly dark grey (Payne's 



grey no. 4, ' Repertoire '), with buffy white tips. Tail very 



similar in colour to back, rather redder on the upper surface. 



No well-defined white tip as in G. microtis, a few of the 



hairs at the extreme end of the tail being tipped with white. 



Skull rather similar to that of 6r. microtis, nasal region 

 narrower and rather more slender. 



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

 Head and body 85 mm. ; tail 70 ; hind foot 18 ; ear 15. 

 Skull: greatest length 27; basal length 22 - 3; condylo- 

 basal length 24*5; basilar length 19*4; condylo-basilar 

 length 22 ; zygomatic breadth 14^; greatest width of brain- 



