and allied East- African Sffcles. 353 



Adult skull (type) : greatest length 29 mm. ; basilar 

 Ungtli 2-4; coudylo-iiicisivo len!::;tli 26; zygomatic breadtli 

 16 ; inteiorbital constriction -i'S ; sc^uamosal breadth of 

 cranium 12 ; length of nasals 11 ; j)alalilar lengtli 12'5 ; 

 length of palatal ioramina 6; alveolar length of upper molar 

 series 0. 



T}/j)e lucaliti/. N\ama Nyango, Eusso Nyiro, East Africa. 



T\pein Hriti.sh JMuseum. Original number 1787. Col- 

 lected by Mr. Kobin lCem|) on January 2otli, 1911. 



Tliis S|)ecie3 is represented in the Museum collection by a 

 li)iig series of specimens from tlic type locality and the 

 Clianler Falls, Eusso Nyiro. It; is evidently allied to the 

 ISoMialiland species, as shown by its small size and pale 

 j)inkisb-biiff colouring. 



(17) Arvicanthis ckanlen', Dollm. 



Arvicmithis chanleri, Dollnian, Ann. & Mag, Nat. Hist. (8) viii. p. 130 

 (1011). 



A large-sized species of the somalicus group, allied to 

 rejytans. 



Size rather larger than in somalicus; tail markedly longer 

 (122 mm.). General colour much as in reptans, rathor 

 lighter and yellower, the bhick ground-colour less dominant. 

 Ears, nose, ocular rings, and backs of hands and feet orange- 

 buff. Flanks washed with a rich buffy tint. Ventral surface 

 white tinged with buff. Tail as in somalicus. 



Skull larger than that of somalicus^ in general proportions 

 equalling that of the abyssinicus group. 



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



Head and body 131 mm. ; tail 122 ; hind foot 25 ; 

 ear 14-5. 



Adult skull (type) : greatest length 34 mm. ; basilar 

 length 27 ; condylo-incisive length 31 ; zygomatic breadth 17 ; 

 interorbital constriction 4:'8 ; squamosal breadth of cranium 

 12'4:; length of nasals 11*7 ; palatilar length 14*2 ; length of 

 palatal foramina (j'Q ; alveolar length of upper molar series Q'b. 



Type locality. Clianler Falls, Eusso Nyiro, East Africa. 



Type in British Museum. Original number 1769. Col- 

 lected by Mr. Robin Kemp on January 23rd, 1911. 



Mr. Kemp collected tiiree further specimens of this species 

 in the Eusso Nyiro district. 



