96 
Annals of the Transvaal Museum. 
204. Georychus arenarius , spec. nov. (Text tig. 9.) 
Differs from the preceding species in having narrow nasals that are 
only slightly broadened at about the middle of their length and posteriorly 
squared or at any rate not pointed ; the premaxilla is produced straight 
back considerably beyond the back of the nasals in all the specimens 
examined." 
Type : Old $, Rietondale (East), Pretoria, 2.3.13. “H. and B. 145, tail 
20, hind foot 25, mammae 2 p.=4.” Cotype, an old from the same 
burrows ; “ EL and B. 145, tail 20, hind foot 27.” Also two young 
specimens from the same burrows, taken on the same day, “ H. and B. 110- 
120, tail 20-22, hind foot 22-24.” These four specimens were all taken 
in white sandy soil and are rather lighter coloured than is the rule. In 
four other specimens taken in red soil not far off the fur is stained with 
the soil, but in other respects there does not appear to be any material 
difference. 
Text fig. 9. — Skull of Georychus arenarius , sp. nov., from dorsal aspect, 
specimen, T. M. Cat., No. 1 2fi5. 
Old <$. 
Cond. inc. leng. ... 40*2 
Cond. nas. leng. ... 36*8 
Zyg.br 26*5 
Br. premax. ... ... 7*3 
Int. orb. br. ... ... 7*5 
Br. brain case ... 15 '5 
Nas. leng. ... ... 14 
Nas. br. ... ... 3*3 
Mol. ser. ... ... 6*8 
Diastema ... ... 12 ’2 
Br. inc. 5‘1 
Br. mol. ... ... 6*8 
Type $. 
Young <J. 
(3 molars.) 
Young 
(3y molars 
37*3 
33-4 
35 • 8 
34-3 
29-6 
32*1 
24*4 
19-2 
21-3 
6-4 
5-2 
5-8 
7*2 
7-5 
7 
15 
14 
14-4 
11-6 
10-2 
11*4 
3 
3 
3 
6-3 
— 
6-5 
11*8 
8*8 
10-6 
4-5 
3*8 
4*2 
6-2 
— 
5*8 
205. Georychus anomalus , subsp. nov. (Text fig. 10.) 
A large form with the nasals long and narrow, about the same breadth 
throughout their length ; mammae six in number. 
Type: Fairly old $, Skinners Court Valley, Pretoria, 23.2.13. 
“H. and B. 140, tail 21, hind foot 26, mammae 3 p. (1 in front, 2 at side) 
= 6.” A taken in burrows not far from where the type was obtained 
is very much larger in all respects, although the incisors are narrow and 
the molars still unworn, seeming to show that it is*fairly young : but on 
* The closing up of the backward projecting points of the premaxilla varies in some 
species, while in others it seems to be a fixed character. 
