636 Mr. E. C. Wrougliton on the 



Arvicanthis pumilio angolce, subsp. n. 



5.5.9.41-46. Caconda, Angola. Alt. 4700'. 



This form, though belonging to the group with medium 

 bullffij is completely separated from the other members of the 

 group noticed above. It is rather smaller all round than 

 pumilio and has a fairly constant though dull coloration, 

 resembling that of dilectus. The tail is apparently markedly 

 shorter than the head and body, much more so than in any 

 other form. 



The normal dimensions may be put as : — 



Head and body 118 mm. ; tail 95 ; hind foot 23. 



Skull : basilar length 23 ; tooth-row 4-7 ; bulh^ 6. 



The skulls are unfortunately much broken and the actual 

 basilar length cannot be measured in any one of them ; but 

 the greatest length and zygomatic breadth are about 28 and 

 13*5 mm. against 30 and 14 in pumilio. I have therefore 

 taken 23 mm. as the probable " basilar length of skull.'' 

 The following measurements are from selected specimens : — 



Basilar 

 Hind length of Length of 

 foot. skull, tooth-row. Bullse. 

 5.5.9.43. ?. Adult ..23 ? 47 6 



(Type) 5. 6. 9. 45. Old .... 23 ? 47 6 



There is a single specimen from Matopo with dimensions 

 as follows : — 



Basilar 

 Hind length of Length of 

 foot. skull, tooth-row. Bullse. 



4.10.1.87. $. Adult 21 19-5 4-5 6 



and the label gives — head and body 89 mm. ; tail 96. 



I do not venture to give a specific name to this form 

 represented by only a single specimen (and that a compara- 

 tively young individual), but have thought the existence of 

 this specimen worthy of record as seeming to indicate that 

 the country west of dilectus and north of Group II. will be 

 found, when examples from it are available, to be peopled 

 by a form with medium-sized bulla?, linking up this specimen 

 with angolce. 



Arvicanthis pumilio Chakce, subsp. n. 



4. 5. 1. 68-74. Sibudeni, Zululand. Alt. 3500'. 

 4. 12. 5. 27-29. Estcourt, Natal. Alt. 4500'. 



