Mammals from Northern Nigeria. 461 



9. Arvicanthis striatus venustus, subsp. n. 



c^. 1. Panyani, 4000'. B.M. no. 11. 3. 24. 13. Col- 

 lected 2 lid May, 1910. Ti/pe. 



A pale form of the ^4. striatus * group. 



JSize about as in ^. pidcher, Wrought., whose distinctness 

 from pahhellus I am disposed to doubt. General colour very- 

 pale, tlie ground-colour between " clay-colour '' and " raw 

 umber/' the light punctated stripes less conspicuous than 

 usual. Under surface dull whitish, not sharply defined 

 laterally. Median black dorsal line strong and well defined 

 as usual. iSides of muzzle and a spot above each eye buffy. 

 Ears with their proectote brown, metentote dull ochraceous ; 

 a tuft at their anterior bases and a small patch behind them 

 deep ochraceous. Hands and feet dull buffy white. Tail 

 brown above, dull whitish below. 



Skull very like that of the type of A. jndcher, but the 

 molars rather larger. 



Dimensions of the type (measured in flesh) : — 



Head and body 119 mm.; tail 140; hind toot 2S, 



Skull: greatest length 32 ; condylo-incisive length 29"3; 

 greatest breadth 15*5; nasals 12*6; interorbital breadth 6 ; 

 palatilar length 14 ; palatal foramina &'d ; upper molar 

 series 5'6. 



Ilab. and Tj/pe as above. 



Quite distinct from any known form of the striatus group 

 by Its pale colour and less conspicuous striping. 



10. Epimysjacksoni viator, subsp. n. 



c? . 6 ; ? . 7. Panyam, 4000'. 



Quite like true Central African Jacksoni, but the colour 

 markedly paler. 



General colour of upper surface pale rufous fawn, darker 

 and more rufous than " clay-colour." Sides dark pinkish 

 buff'. Belly white, the bases of the hairs slaty grey. 



Dimensions of the type (measured in flesh) : — 



Head and body 109 mm. ; tail 167 ; hind foot 26; ear 20. 



Skull : greatest length 32 ; condylu-incisive length 28'8 ; 

 nasals] 2*2; interorbital breadth 4*6 ; palatal foramina 7*5 ; 

 upper molar series O'l. 



Uab. as above. 



* Cf. P. Z. S. 1911, p. 1-J8. Sierra Leone specimens, however, will be 

 needed, for comparison with the t;jpes oi jJulcher &.\i^ pulchellus before the 

 mutual relationships of the three can b^ made out. 



