25 
to be, in the part of New Guinea explored, a remarkable absence 
of arboreal species, these forming in other parts of New Guinea 
a large proportion of the mammal fauna. 
No species were now described as new, as the novelties had 
been already published in previous papers. 
This paper will be published in the Transactions, 
Mr. Guy Dottman read a paper, communicated by OLpFrreLp 
Tuomas, F.R.S., F.Z.S., on the Mammals obtained by Mr. Wil- 
loughby P. Lowe during the recent East African Expedition 
organized by Mr. G. P. Cosens. The entire collection, some two 
hundred specimens in all, was presented by Mr. Cosens to the 
National Collection. 
Besides examples of many rare and important species, speci- 
mens of the following new forms were included :— 
GERBILLUS COSENSI, Sp. n. 
Allied to G. dunni, but smaller and duller in colour. 
Head and body 75 mm.; tail 129; hind foot 25. 
Hab. Kozibiri River, Ngamatak, Turkwel River. 
Type. Male. B.M. No. 13.10.18.64. 
TATERILLUS LOWEI, Sp. n. 
Allied to 7. nubilus, but very much paler in colour. 
Head and body 107 mm. ; tail 160; hind foot 28. 
Hab. 10 miles west of the Ngamatak Hills, Turkwel River. 
Type. Male. B.M. No. 13.10.18.66. 
EPIMYS WALAMBZ AMAL, subsp. n. 
Allied to #. walambee pedester, distinguished by its smaller 
size, buff-tinted flanks, and white ventral surface. 
Head and body 144 mm.; tail 127; hind foot 26. 
Hab. Lemek Valley, between the Amala River and Southern 
Guaso Nyiro. 
Type. Female. B.M. No. 13.10.18.111. 
EPrMys COUCHA PALLIDA, subsp. n. 
Allied to #. coucha newmani, smaller in size and withovt any 
buff suffusion on ventral surface. 
Head and body 87 mm,; tail 100; hind foot 21. 
fab. Kamechuru, Lobor, Central Province, Uganda, 
Type. Male. B.M. No. 13.10.18.99. 
ARVICANTHIS RUMRUTI PALLESCENS, subsp. n. 
Allied to A. rwmruti, larger in size and much paler in colour, 
Head and body 130 mm.; tail 109; hind foot 26. 
Hab. Loita Plains, British East Africa, 
Type. Male. B.M. No, 13,10.18.142, 
