ON EAST AFRICAN MAMMALS. 307 
21. Notes on a Collection of Fast African Mammals pre- 
sented to the British Museum by Mr. G. P. Cosens. By 
Guy DoLiman *. 
[Received February 12, 1914; Read April 7, 1914.] 
INDEX. 
Systematic :— Page 
CEROWILS COSEPB0, EDs We cao ceoscceoss00n0 soo cagceo-no cor dll 
DUEPOUS UORBBIy BD We 00000060005 09006008 000 060 050060 312 
Epimys walambe amala, subsp. 0..........0:.0 ee 818 
Hypimys coucha pallida, subsp. n. ......cseceeee veces 314 
Arvicanthis rumruti pallescens, subsp. n. ......... 316 
3138 
Cephalophus grimmia lutea, subsp. nN. ...... 22.26... 
I have the pleasure of furnishing a report on the Mammals 
obtained by Mr. Willoughby P. Lowe during the recent East 
African Expedition organized by Mr. G. P. Cosens. The entire 
collection, some two hundred specimens in all, has been presented 
by Mr. Cosens to the British Museum. 
Jn working out this collection I have found it necessary to 
describe six new forms 7, the most interesting of which, the new 
Gerbil (Gerbillus cosensi), I have named in honour of the generous 
donor. Another interesting novelty, Z'aterillus lowei, 1 have 
ealled after Mr. Willoughby Lowe, the collector. 
The East African mammals were obtained in the Naivasha and 
Nyanza Provinces. The route taken was from Kijabe to 
Mt. Suswa, where the first collecting was done, then westwards 
across the Loita Plains and Lemek Valley to the Amala or Mara 
River. After ten days’ collecting along the Amala River the 
expedition turned south towards the Anglo-German Boundary 
and then eastwards, via Leganisho, to Lengototo, the Narossura 
and Southern Guaso Nyiro Rivers. Further collecting was done 
along the southern Guaso Nyiro, and the party then proceeded 
northwards as far as the Mau Escarpment, returning to the 
railway at Naivasha. 
The Uganda Expedition started from Baringo in December, 
1912. and travelled in a north-easterly direction across the Kerio 
and Wei Wei Rivers, and then along the Turkwel as far north 
as Ngamatak. Turning westwards the party reached the Kozibir 
Hills on January 22nd, 1913, and Mt. Maroto on January 28th. 
Proceeding in an easterly direction, via the Nakwai Hills and 
Lobor Mountains, Kamchuru was reached on February 9th, 
and here the greater part of the collecting was done. Other 
* Communicated by OLpFIELD Tuomas, F.R.S., F.Z.S., and published by per- 
mission of the Trustees of the British Museum. 
+ [The complete account of the new forms described in this communication 
appears here, but since the names and preliminary diagnoses were published in the 
“ Abstract,’ No. 131, 1914, these species are distinguished by the names being under- 
lined—Eprror. ] 
21 
Proc. Zoot. Soc.—1914, No. XXI. 2 
