522 PROCEEDINGS OF THE ACADEMY OF [1896. 



thirds grown ; its total length is 269 ram., tail vertebrae 150, hind 

 foot 37, tail tuft 40. 



25. Sciurus ganana sp. nov. Ganana Jungle Squirrel. 



Type, ad. 9 , No. 3,809 ; collection of Academy of Natural Sci- 

 ences of Philadelphia, Dr. A. Donaldson Smith Collection ; taken 

 February 18, 1895, on the Ganana River at Bar Madu. 



Description — Size smallest (?) of the East African squirrels ; tail 

 1} times length of head and body ; head long and very slender ; ears 

 large, rounded and somewhat pointed, without tufts. Fur soft and 

 rather short. Above, uniform tawny ochre, faintly grizzled with 

 black ; below, tawny white. 



Upper tail colored like back, lower tail with broad mesial stripe 

 of clear, rusty ochre. 



The dorsal hairs are black-based and black-tipped, with a sub- 

 terminal ring of ochre, as are also those of the upper head. On the 

 sides the hairs are black at base with long ochre tips, and on the 

 limbs and feet and sides of neck the ochre almost obscures (exter- 

 nally) the darker basal color. The tawny white hairs of lips, cliiu, 

 throat, breast, abdomen and inner legs are unicolor to their bases. 

 The region just above and below eyes is of the same color. The 

 whiskers reach to tip of recumbent ears and are sparse and black. 



The hairs of upper tail are ochre and black, ringed by four to six 

 alternating zones of equal width, the basal one being ochre, the 

 minute terminal one black. The lower mesial tail hairs appear to 

 be uniform rusty ochre, but a glass reveals a narrow, subterminal 

 black ring. The outer border and tip of lower side of tail is like the 

 upper side. 



The skull is remarkably narrow and deep for its length, the post- 

 orbital process very short and blunt, the brain-case highly and nar- 

 rowly arched and the audital bulla? widely separated from the 

 pterygoid processes, owing to the strong, indented constriction of 

 the inner anterior border of the bullre. The auditory meatus is also 

 oom pressed within the outer lateral plane of the overhanging squa- 

 mosal. Upper molar series with permanent, cylindric pm- 2. 



Measurements (taken by collector, in the flesh) — Total length, 

 S20 mm.; tail vertebra?, 170; hind-foot, 38; height of ear (from 

 <;rown, dry), 9 ; tail pencil, 40. 



Skull— Total length, 39 mm. ; basilar length (of Hensel), 32 ; 

 greatest breadth, 21-5; greatest depth (occiput to planeof bullre and 

 incisors), 17 ; length of nasals, 11 ; post-orbital constriction (behind 



