On Three new Rodents from Africa. 251 



what compressed between the large bullte, much liigher than 

 broad ; the molar series not converging appreciably poste- 

 riorly ; posterior cusp of ^i^ large, occupying more than a 

 third part of the surface of the whole tooth. 



I have great pleasure in associating the name of the 

 collector with this very interesting new form. 



(11) Pectinator Spekei^ Blyth. 

 a. Lehello, 10th June. 



(12) Lppus somalensis^ Heugl., or L. berheranusj Heugl. 

 a. Lehello, 12th June. 



Perhaps the specimen in the present collection agrees best 

 with the description attached to the latter name; but as I 

 have not had an opportunity of seeing the types, I am unable 

 to say if they are really distinct species. 



The upi)er incisors have the grooves entirely filled with 

 cement level with the surface. 



XL. — Descriptions of Three new Rodents from Africa. 

 By W. E. DE WiNTON. 



Anomalurus Jacksoni, sp. n. 



Closely resembling A. cinereus in size and colour, but 

 distinguished by having a black muzzle, a black ring round 

 the eyes, and a large black spot behind the ear (all tliese 

 characters are found in the West-African brightly coloured 

 species A. erythronotus) \ a still more interesting outward 

 distinction is the greater extension of the soft fur on the 

 upperside of the wings, the rigid adpressed hairs being con- 

 fined to a small space barely 2 inches long from tlie point of 

 the expanding process backwards ; there is not so much white 

 on the underside of the neck and no white band from ear to 

 ear, and the undersides of the fore and hind legs are dusky, 

 and not clear white as in -4. cinereus. 



Type {S)j Ntebe, Uganda, 6th Oct., 1895. Collected by 

 Mr. F. J. Jackson, II. M. Acting Commissioner in Uganda. 



Measurements (taken from the dried skin) : — 



Head and body (c.) 320 milliin. ; tail (c.) 200; hind foot 

 (c.) ry.^; ear (c.i '61. 



Skull : greatest length 58 ; greatest breadth 38*5 ; greatest 

 length of nasals (diagonally of one bone) 15-5 j narrowest 



