new African Muiidai. 381 



from the range by its materially larger size, longer skull, 

 and heavier teeth, in which respects it equals Uameroou 

 specimens of (E. h^po.vanthiis. 



Lophuromys naso, sp. n. 



Size and other characters of L. nudicaudus, Hell,, but teeth 

 peculiarly cuspidate. 



External appearance about as in L. nudicaudus, the colour 

 above rather paler brown and below duller (betweenochraceous 

 tawny and clay-colour). Tail rather longer. 



Skull with a peculiar slender low muzzle, its upper profile 

 flattened, even concave at a point above the front end of the 

 palatal foramina. Anterior zygoma-root as in L. nudicaudus. 



Incisors apparently a little more thrown forwards than in 

 L. nudicaudus. Molars narrow ; m^ with the small outer 

 accessory cusps very unusually developed, the one between 

 the first and second laminae about as long as it ever is in 

 ordinary Lophuromys, while that between the second and third 

 laminae is produced into a high upstanding cusp almost 

 rivalling in height the main outer cusp just behind it. 



Dimensions of the type (measured in skin) : — 



Head and body (probably shrunk) 95 mm.; tail 63; hind 

 foot 19 ; ear 15. 



Skull : tip of nasals to anterior corner o£ interparietal 2^'b ; 

 nasals 11'7 ; interorbital breadth 6; breadth of brain-case 

 12*5 ; palatilar length 11*5 ; palatal foramina 5*5 ; upper 

 molar series 4*7. 



Hah. Gaboon. 



Type. Adult. B.M. no. 7. 1. 1. 85. Tomes Collection. 

 Obtained from Messrs. Verreaux about 1855. 



The great development of the accessory cusps of )n^ and 

 the peculiar shape of the muzzle will distinguish this species 

 from any Lophuromys iiitherto described. 



This specimen, from Mr. Tomes's collection, belongs to a 

 small set of skins from the Gaboon which are labelled as 

 having been described by J. and E. Verreaux in the ^Kevue 

 et Magasin de Zoologie,' 1855, under various names, all 

 unknown to naturalists, but apparently the paper was never 

 published. Had it been, Peters^s name Lophuromys for the 

 genus would have been antedated by that proposed by the 

 brothers Verreaux. 



Thamnomys luntingi, sp. n. 



A Western species of the iheanus and macmillani group. 

 General external appearance as in other members of the 



