88 
Annals of the Transvaal Museum. 
162. Mus socialis, spec. nov. 
Very similar to M. natalensis , but with twenty-four mammae and the 
tail much shorter than the head and body ; colour very similar to 
M. paedulcus (specimens from Fort St. Johns), but tail shorter than in that 
species. 
Type : $, ex coll. Dr. H. L. Jameson, Wonderfontein, Transvaal. “H. 
and B. 10<S, tail 93, hind foot 21.” Skull: gr. leng. 29, basal leng. 23*6, 
mol. ser. 4*5. 
A £ from Potchefstroom (Ayres) is probably referable to this species : 
it measures “H. and B. 120, tail 101, hind foot 22.” Skull : gr. leng. 29*8, 
bas. leng. 24 '9, mol. ser. 4*6. 
163. Mus , spec. ? 
3 o, 5 5, Hilton Road, Natal (Jameson). 
These specimens are slightly smaller than those of natalensis recorded 
above, and in all cases the are labelled as having only sixteen mammae. 
None of them are very old, however, and it is possible that they are 
referable to young adults of natalensis. 
The following are measurements of adult specimens of concha , 
natalensis , socialis , and those from Hilton Road : — 
concha. 
natalensis. 
natalensis ? 
(Hilton Road). 
socialis. 
(13 spec.) 
(17 spec.) 
(8 spec.) 
(2 spec.) 
H. and B. 
... 83 - 
03 
110 -131 
100 
-110 
108 -120 
Tail 
... 70 - 
84 
109 -123 
95 
-110 
93 -101 
Hd. ft. ... 
... 20 
22 
21 - 25 
22 
- 25 
21 - 22 
Ear 
... 16 - 
19 
16 - 20 
17 
- 19 
p 
Skull : — 
Gr. leng. 
... 26 - 
27 
28*4- 32*3 
27 
- 28*1 
29 - 29*8 
Bas. leng. 
... 20*5- 
22 
23 - 25*3 
22* 
2- 23*3 
23*6- 24*9 
Zyg. br. 
... 13 - 
L3 * 7 
13*5- 15 
13 
- 15*5 
— 
Mol. ser. 
... 4*5- 
4*7 
4*5- 5*1 
4* 
5- 4*9 
4*5- 4*6 
164. Leggada minutoides , (A. Sm.). 
Very large series, Port St. Johns (Swinny). 
.1 1 $, Pirie, Kingwilliamstown (Stenning). 
Thl large series from Port St. Johns represents all stages of adult 
growtli, and displays considerable variation in shade of colour between 
rufous and brown, without, however, regard to size or sex. The following 
is the range of variation in size between fairly young and old specimens : 
H. and B. 4f>-65, tail 40-54, hind foot 12-14, ear 9-11. Skull : gr. leng. 
18-20*5, bas. leng. 13*5-15, zyg. br. 9*2-10*1, mol. ser. 2 *8-3 *4. 
16 >. Leggada bella marica , Thos. 
1 (J, Beira (Sheppard). 
166. Leggada bella , subsp. ? 
2 $, Tzaneen Estate (Jameson). 
167. Leggada deserti , Thos. 
1 <£, Pretoria (Roberts). 
168. Thamnomys doli churns , (Smuts). 
16, Port St. Johns (Swinny). 
1 in spirits, Malvern, Natal (Jameson). 
169. Thamnomys surdaster , Thos. and Wr. 
1 (J, Katanga (Neave). 
