ill the Collection of the British Museum. 327 



Hab. Fernando Po (Thompson, B.M. ; Mr. Waterhouse, 

 type; Burton, B.M. ; Du Chaillu, B.M.). Niger Expedition 

 (Fraser, B.M.) 



Sciurus mutabilis, Peters, Saugeth. 131, t.31, 32. f. 2, Mossam- 

 bique, is probably a variety of S. Stangeri, with white tip to the 

 tail. 



The species is known from M, Wilsonii, which is also nakedish 

 beneath, by the size of the cutting-teeth. 



2. Macroxus shirensis. 



Fur whitish gi'ey, closely punctulated with black ; hairs of the 

 back dull grey at the base, with a broad black subterminal band 

 and an opaque-white tip ; tail elongate, black, white-ringed, and 

 with a black tip ; hairs of the tail black, with four white rings 

 and a grey tip. 



Hab. East Africa, River Shire (Dr. Livingstone). 



Smaller and paler than S. Stangeri, the fur shorter and closer; 

 the cutting-teeth in one specimen are as wide as those of M. 

 Stangeri, and in the other rather narrower. 



These squirrels vary in the width of the under cutting-teeth ; 

 in general they are nearly as wide in front as the upper ones, 

 but in some specimens they are more compressed and narrower. 



b. Body with a white marginal streak on each side ; sides of neck 



white. 



3. Macroxus caniceps. 



Sciurus caniceps, Temm. Esq. 127 (summer), 1853. 



Sc. Nordhqffii, Du Chaillu, Bostou Journal, 1860, vii. p. 363. 



Dark olive-grey, black-and-yellow-dotted ; crown and temples 

 black, minutely white-dotted : tail darker, with narrow white 

 rings; hairs very long, yellow-and-black-ringed, with a grey tip : 

 feet reddish ; sides of neck, throat, and underside of body white, 

 very sparsely hairy, except on the throat and near the dark part 

 of the back. 



Hab. West coast of Africa (Verreaux) : B.M. Ashantee : 

 B.M. 



The red spot on the back of the ear is not always visible ; it 

 depends on the position of the hair. This species is at once 

 known from >S. Stangeri by the darker colour, more minute 

 punctulation of the fur, the white sides of the neck, and streak 

 along the sides of the body. 



Mr. Nordhoff is the reputed writer of M. du Chaillu's first 

 book of travels. 



