502 Mr. R. C. Wroughton on 



Lairs scattered among tlie rest ; underside white, basal fourth 

 of hairs slaty. Head and face like back, but a briglit buff 

 patch on cheek below eye. Upper lip and chin white like 

 belly. Hands and feet pure white. Tail sparsely clad ; 

 rings 8 = 10 mm. 



Skull markedly smaller in all details than that of ^7. Hindeif 

 except the teeth, which are about the same size. 



Dimensions of the type : — 



Head and body 147 mm.; tail 156 ; hind foot 28 ; ear 16. 



Skull ; greatest length 36 ; basilar lengtli 29 ; greatest 

 breadth 18; nasals 14 ; interorbital breadth 5'5; brain-case 

 breadth 14*5 ; diastema 9*5 ; length of upper molar series 6 ; 

 bulla? 7. 



Hah. Chak Chak, Bahr-el-Ghazal. 



Ty2:)e. Adult male. Collector's number 24. Taken 

 25th February, 1907. 



Four specimens (unfortunately all males) examined. 



13. lilus Blainei, sp. n. 



? . 7, 8. Ayum. 4. i. 07. 



$ . 19. Chak Chak. 22. ii. 07. 



^ . 39. Between Chak Chak and Dem Zubeir. 9. iii. 07. 



c?. 47. Between Chak Chak and the Pongo. 19. iii. 07. 



A small soft-furred mouse with a rather short tail. 



Size about as in M. Alleni and M. Dennke, but with a 

 quite short tail. 



Fur soft and silky, about 10 mm. long on the back. 



General colour above " Isabella," the hairs slate-colour 

 from their bases for three fourths their length, terminal 

 fourth pale orangc-bufF with black tips ; underside white, 

 the basal half of hairs slate-colour. Face below the eyes, 

 sides of neck, and flanks "orange-buff" with a mixture of 

 " vinaceous buff"; chin and upper lip white; hands and 

 feet white ; tail sparsely haired, darker above than below, 

 with about 2 rings = 1 mm. 



Skull and teeth of the usual type in Mus. 



Dimensions of the type : — 



Head and body 100 mm. ; tail 103; hind foot 22 ; ear 20. 



Skull : greatest length 28 ; basilar length 22 ; greatest 

 breadth 13*5 ; nasals 10 ; interorbital breadth 4*3 ; brain- 

 case breadth 11*3; diastema 7*8 ; length of upper molar 

 series 4'5 ; bullae 5. 



Hah. Chak Chak, Bahr-el-Ghazal. 



Type. Young female. Collector's number 19. Taken 

 22ad February, 1907. 



