Annals of the Transvaal Museum. 
183 
Mus limpopoensis , spec. nov. 
1 <J, Sand River, north-eastern Transvaal (Mns. Exped.). 
A small species closely resembling M. concha , but with a much longer 
tail. “ H. and B. 80, tail 98, hind foot 22, ear 18 mm.” Skull : greatest 
length 25 -9, basal length 20 -5, zygomatic width 12 -8, width brain case 11 -5, 
nasals 9 -8 by 3, molar series 4 -6, diastema 6 -8. 
Saccostomus limpopoensis , spec. nov. 
1 $ (type), Sand River, north-eastern Transvaal (Mus. Exped.). 
1 ?, Mapagone, north-eastern Transvaal (Mus. Exped.). 
Resembling S. mashonae in having a well-developed external cusp to 
M 2 , but with a shorter tail and smaller skull. In colour this species has 
hardly a trace of dark brown to the tips of the fur, so that the whole of 
the upper surface presents a pale sandy buff appearance ; both the male 
and female are of this colour, though the female is somewhat smaller in 
size. The type is a fairly old male, the teeth being partly worn. Measure- 
ments of the type are : “ H. and B. 127, tail 30, hind foot 17, ear 17.” 
Skull : greatest length 31 -7, basal length 26, zygomatic width 16 -2, molar 
series 4 1, diastema 9, bullae 7, width brain case 12 mm. The female 
measures in the skull : greatest length 30 -7, basal length 24 -5, zygomatic 
width 15 -5, molar series 4 -4, diastema 8 -6 mm. 
I find on re-examining our specimens of this genus that a specimen 
from Boror not mentioned in my previous paper should be referred to 
S. elegans, Thomas, and with the acquisition of another specimen from 
Hector Spruit that those from there should not be referred of S. mashonae, 
but another species, which I propose to name 
Saccostomus streeteri, spec. nov. 
This species is similar to S. mashonae in having the external cusp of 
M 2 well developed, but otherwise the colour is like that of S. campestris, the 
tail longer (45-57 mm. in four specimens) and the skull smaller. Type : 
ad. <$, ex collection F. Streeter, Hector Spruit, 14th May, 1913. “ H. and 
B. 127, tail 50.” Skull : greatest length 32 -7, basal length 27 -3, zygomatic 
width 15 -8, molar series 4 -6, diastema 10 -5, bullae 7 *5, width brain case 12. 
The cotype (?) measures: “H. and B. 114, tail 45.” Skull: greatest 
length 30 T, zygomatic width 15-1, molar series 4 -9, diastema 9 mm. 
Mystromys albicaudatus fumosus, Thos. and Schw. 
1 ?, Potchefstroom (F. D. Ayres). 
Specimens referred to M. albipes in my previous paper seem also to 
be referable to this species. They are labelled M . albipes by Jameson ; 
but in the published list of his specimens he recorded them as M. albicaudatus. 
In so far as can be judged by the literature, it would seem that the two 
species are synonymous, but specimens from Transvaal are somewhat 
larger and should be distinguished as M. albicaudatus fumosus. 
Georychus spec. ? 
1 $, Limpopo ; 1 Stimelas Kraal, south-eastern Rhodesia (Mus. 
Exped.). 
