466 ]\lr. n. L. Jameson on 



(35) Georychus hottentottus (Lesson). 



Malvern, Natal. 



(?. 415; $.416. (January 1908.) 

 Tzaneen. 

 <S. 329. 



(36) Georychus Jwlostriceus Wagner. 



Johannesburg. 

 Series. 



(37) Georychus jorisseiii^ sp. n. 



Wajriek, Waterberg District, Transvaal. 



? . 383, 402. 



Tzaneen, Zoutpansberg District, Transvaal. 



cJ. 213 (juv.); ? . 224, 225, 226, 269, 330, 355 (juv.). 



From a careful examination ot the specimens in my 

 collection and in the British Museum, it appears that there 

 are at least tour mole-rats, in adilition to the several blesmols 

 and the Angolan G. bocagd, in South Africa : — • 



(a) In Southern Cape Colony, and up through the Coast 

 Belt of Natal and Zululand, as far as the Zoutpansberg, 

 G. hottentottus is found, witli its local race G. hottentottus 

 talpoides Thos. in the Knysna. 



(6) In the interior and on the High Veld, from Graaf 

 Keinet (type locality) through the Orange River Colony to 

 the Witvvatersrand, and down into the highlands of Natal 

 (Estcourt), the larger and stouter G. holosericeus Wagner, is 

 found. 



(c) In Southern Rhodesia this form appears to be replaced 

 by the very closely allied G. nimrodi de Winton, which 

 differs mainly in its skull-characters. 



(d) Finally, in the Waterberg there is a much smaller 

 species, which I have named after Mr. E. Jorissen, of 

 Johannesburg, who kindly invited me to accompany him on 

 one of his geological expeditions to the W^aterberg, on which 

 occasion I obtained the type here described. 



Georychus jorisseni probably extends right across the 

 Buahveld in the Northern Transvaal, as a form which I 

 cannot, from available material, distinguish from it occurs 

 in the Zoutpansberg, alongside of G. hottentottus ^ and in 

 Natal (Grant's Illovo seiies in British Museum). 

 Georychus jorisseni may be described as follows : — 

 Much smaller than G. hottentottus, with a ratlier warmer 

 colouring. Skull much smaller and slighter, zygomatic 

 arches rather depressed, giving the orbit a narrower outline 

 when seen from above. 



