•various Forms o/" Ai-vicantliis puniilio. Gol 



B. Antero-posterior length of bullae 6 mm. 



a. Length of tooth-i-ow 4'8 mm. 



rt\ -Basilar length of skull 24 mm jmmilio, Sparrm. 



b^. Basilar length of skull 21 mm (?) vittutus, Waguer. 



b. Length of tooth-row less than 4-8 mm. 



a}. Hind foot 2-3 mm. ; basilar length of 



skull 23 mm.; length of tooth-row 



4'7 mm amjolce, subsp. n. 



J\ Hind foot 22 mm. ; basilar length of 



skull 21'5 mm. ; length of tooth-row 



4'6 mm intermedial^ subsp. n. 



c^ Hind fojt 21 mm. ; basilar length of 



skull 20 mm. ; length of tooth-row 



4'5 mm (Matopo specimen.) 



C. Antero-posterior length of bullae o-5 mm. 



a. Hind foot 22 mm. ; basilar length of skull 



24 mm. ; length of tooth-row 4'o mm. . . Chakce, subsp. n. 



b. Hind foot 20 mm. ; basilar length of skull 



2-!i-5 mm. ; length of tooth-row 4-o mm. . . ditninutus, Thos. 



c. Hind foot 20 mm. ; basilar length of skull 



22 mm. ; length of tooth-row 4-4 mm. . , dilectiis, de Wiut. 



D. Antero-posterior length of bullae 5 mm. 



a. Brighter coloured. Basutoland Moshesh, subsp. n, 



b. Sombre-coloured. Nyasa nyasce, subsp. n. 



Arvicanthis jnimiUo hechuance. 

 Isomys pumilio hechuana, Thomas, P. Z. S. 1892, p. ool. 



57. 1. 28. 10. '' Bechuanalaud." (Type.) 



81. 3. 8. 8. ? . Great Narnaqualand. 



The type specimen is a very old one, and the skull is not 

 available, but the enormous hind foot is alone sufficient to 

 differentiate this form from any other. 



Arvicanthis pumilio cinereus. 

 Arvicanthis jnifuilio cinereus, Thos. & Schw. P. Z. S. 1903, vol. ii.p. 3.36. 



4.2.3.68-74. Klipfontein, Narnaqualand. Alt. 3104'. 

 Eudd Collection. 



98. 9. 3. 5-7. Garies, Narnaqualand. (No skulls.) Dr. R. 

 Broom. 



In the original description the length of the hind foot is 

 given, from the collector's label, as 28 mm., but this measure- 

 ment is not, I think, reliable ; measured on the specimen, the 

 majority of the series show a hind foot of 26 mm. or slightly 

 over. Judging from the other dimensions recorded by the 

 collector, the tail in this form is slightly longer than the head 

 and body. 



The following are the normal dimensions of an adult 

 individual : — 



Head and body 120 mm. ; tail 125 ; hind foot 26. 



