272 Mr. 0. Thomas on Mammals of 



10. Arvicanthis striatus venustus, Thos. 



S . 14, 42 (young), 86. 



'I'he size-vaiiatiou in this animal is considerable, and one 

 specimen — no. 40 — alike in other respects, is so much 

 smaller that I do not venture delinitely to include it with the 

 rest until further specimens show if intergradation is complete. 



11. Arvicanthis harharus nigerice^ subsp. n. 



S. 16 (young), 17 fyoung), 25; ? . 52, 53, 88. 



Pattern and general colour-tone as in Moroccan A. harharus, 

 but size scarcely greater than in A. dunni. Light lines 

 buffy, not white as in A. oweni. 



Skull intermediate in size between those of A. harharus 

 and dunni. 



Dimensions of the type (measured in skin) : — 



Head and body 108 mm.; tail 114; hind foot 24; ear 14. 



Skull: greatest length 29*3; condylo-incisive length 27; 

 zygotnatic breadth 13'4 ; palatal foramina 6*2; upper molar 

 series 5. 



Type. Old female. B.M. no. 12. 1. 16. 45. Original 

 number 88. Collected 21st October, 1911. 



This is a small local race of the Barbary mouse, its colour 

 agreeing more with that of N. African specimens than witii 

 either the Gamblan oioeni or the Soudanese dunni. 



12. Dasymys sp. 

 S. 32 (young). 



13. Acomys johannis^ sp. n. 



cJ . 102 ; ? . 109._ Kabwir, 2700'. 



A fairly large species, with bluish back and buffy sides. 



Size about as in A. viator^ geographically the nearest known 

 species. Coat fully spinous, the spines on the back about 

 10 mm. in length. Colour of dorsal area bluish grey, of 

 sides finely speckled fawn or bufty, wiiich is sharply defined 

 below from tlie pure white under surface. Crown blue-grey ; 

 checks like sides, a large whitish spot below the eye and 

 another at the u{)per base of the ear. Hands and feet white. 

 Tail of normal length, brownish white above, white below. 



Skull low, the ridges of medium development. Post- 

 orbital pronnnences well marked, so that the supraorbital 

 edges are slightly concave outwards. Teeth larger than in 

 viator. Bullee rather small, much smaller than in that 

 species. 



