502 Mr. E. C. Wroughton on 



hairs scattered among the rest ; underside white, basal fourth 

 of hairs sLity. Head and face Hke back, but a bright buff 

 patch on ciieek 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 ili. Hindeiy 

 except the teeth, which are aboiit the same size. 



Dimensions of the type : — 



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



Skull : greatest length 36 ; basihir length 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. 



Ilab. Chak Chak, Bahr-el-Ghazal. 



Ti/pe. Adult male. Collector's number 24. Taken 

 25th February, 1907. 



Four specimens (unfortunately all males) examined. 



13. Mus Blainei, sp. n. 



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



? . 19. Chak Chak. 22. ii. 07. 



<j . 39. Between Cliak Chak and Dem Zubeir. 9. iii. 07. 

 (J . 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. DennicB, 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 orange-bufF with black tips ; underside wliite, 

 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 wiiite ; tail sparsely haired, darker above tiian below, 

 with about 2 rings=l 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 ; buUas 5. 



Hah. Chak Chak, Bahr-el-Gliazal. 



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

 22iid February, 1907. 



