Mammals from Northern Angola. 415 



29. Arvicanthis pulclielluSj Gray. 



(J . 63. Pungo Andong'o. 



S. 157, 185 ; ? . 150, 181, 182, 186. Braganza. 



^ . 177. Marimba, Jinga Country. 



30. Pelomys campance^ Huet. 



^ . 4. Ambaca. 



S. 35, 36, 118, 119; ? . 37, 130. Pungo Andongo. 



S . 149, 161. Braganza. 



Tyi^e locality. Landana, Lower Congo. 



31. Pelomys f rater ^ sp. n. 



(^.168; ?. 154,167. Braganza. 



A darker-bellied form than P. campance. Molars larger. 



General colour above of the usual iridescent dark yellowish 

 olive; no dorsal stripe. Sides rather more bufFy. Under 

 surface dirty greyish bufFy, the hairs dark slaty for two thirds 

 their length, bufFy at tips ; line of demarcation on sides not 

 sharply defined, the upper and lower colours passing quite 

 gradually into each other. Head rather greyer than body ; 

 sides of muzzle and orbital rings not prominently bufFy ; ears 

 dark brown, a ferruginous spot at their anterior bases. 

 Limbs like body ; upper surface of hands and feet grey, not 

 fulvous. Tail shorter than in P. campano', black above, dull 

 whitish below. 



Skull much as in P. campance^ the palatal foramina rather 

 shorter and the bullas larger. 



Incisors thick and powerful. Molars very broad and 

 heavy, conspicuously larger than in P. campance. 



Dimensions of the type (measured in the flesh) : — 



Head and body 139 mm. ; tail 136 ; hind foot 31 ; ear 20. 



Skull: greatest length 32 ; basilar length 25*7 ; zygomatic 

 breadth 15'5; nasals 11*7 ; interorbital breadth 4'7 ; breadth 

 of brain-case 14 ; diastema 8 ; palatal foramina 5*8 ; length 

 of upper molar series 6"8 ; breadth of m^ ''I'D. 



Hah. Braganza. 



Type. Male. B.M. no. 4. 4. 9. 107. Original number 168. 

 Collected Gth August, 1903. 



It is interesting to find two forms of Pe/om^s inhabiting the 

 same region, but there can be no question as to the distinction 

 of P.frater from P. campance. Pousargues's P. Dyhowskii^ 

 from French Congo, is a very much larger species than either 

 (hind foot, c. u. 38 ; molars 8'5 mm.). 



