632 Mr. R. C. Wrougliton on the 



Skull : basilar length 24 ; length of tooth-row 5 ; ant.- 

 post. length of bullfe G*5. 



The following are measurements taken on a few selected 

 specimens : — 



Arvicanthis pumilio meridionalis, subsp. n. 



95. 9.3. 11-12. Rondebosch, Cape Town. F. C. Selous. 



3. 7. 2. 32, 34. Tokai Ketreat, Cape Town. Alt. 600'. 

 Kudd Exploration. 



2. 9. 1. 63. Deelfontein. Col. Sloggett. 



The normal dimensions of this form are : — 



Head and body 125 mm.; tail 120; hind foot 25. 



Skull : basilar length 24 ; length of tooth-row 5 ; buUai 6-5. 



This form differs but little in dimensions from civereus 

 except that the hind foot is slightly but constantly shorter. 



Whereas cinereus, however, is one of the few forms which 

 are constant in their coloration, in which there is no trace of 

 rufous or fulvous, meridionalis, on the other hand, has no 

 two individuals alike, though all are markedly tinged with 

 fulvous. 



The following are dimensions taken from selected specimens 

 of meridionalis : — 



Arvicanthis pumilio griquce, subsp. n. 



4.10.1.61,4.4.8.15-21. Kuruman, Bechuanaland. 

 Alt. 4000'. 



* These age classes throughout this paper are :— Young : basilar suture 

 not closed. Y. adult : all teeth un-svom. Adult : posterior molar worn. 

 Old all teeth slightly worn. V, old : teeth worn Hat. 



