314 MR. GUY DOLLMAN ON 
Dimensions of the type (measured in the flesh) :— 
Head and body 144 mm.; tail 127; hind foot 26; ear 17. 
Skull: greatest length 37°5 mm.; basilar length 31-3; condylo- 
incisive length 36; zygomatic breadth 20; interorbital con- 
striction 5:5; length of nasals 15:5; palatilar length 18; length 
of palatal foramina 9°3; alveolar length of upper molar series 6-7, 
Hab. Lemek Valley, between the Amala River and Southern 
Guaso Nyiro. Altitude 6500 feet. 
Type. Old female. B.M. No. 13.10.18.111. Original number 
30. Collected on October 8th, 1912. 
This Rat is readily distinguished from the Uganda race by 
its smaller size, whiter belly, and buff-coloured flanks. Since 
pedester was described more fully adult specimens of this race 
have been received. The following dimensions are taken from an 
old individual collected by Mr. Robin Kemp at the type locality: 
Head and body 196 mm.; tail 151; hind foot 33; ear 23:5. 
Skull (broken): palatilar length 20-2 mm.; length of nasals 17; 
zygomatic breadth 23°6; alveolar length of upper molar series 7-9. 
41. Errmys mepicatus Wrought. 
¢. 141. 45 miles N.W. of Baringo. 
42, EpIMYys JACKSONI de Wint, 
do. 49. Amala River. 
43. EPIMYS NIVEIVENTRIS Osg. 
3. 97. Narossura River, B.E.A. 
A very dark specimen. The large series of this interesting 
Mouse collected by Mr. Pereival show that it is subject to very 
considerable colour variation. 
44, Epimys coucHa PANYA Heller. 
6.2. Mt. Suswa. 
g. 16,17. Western Slope of Mau Escarpment. 
g¢. 35. Amala River. 
Heller’s type came from the Athi Plains. The specimens 
from Mt. Suswa and Mau are thus nearly topotypes, and appear 
to agree very closely with the description and with the topotypes 
in the Museum Collection. 
45, Kpimys COUCHA PALLIDA Dollm. 
Abstract P.Z.S. 1914, p. 25. (April 14.) 
6. 199, 210, 211, 216, 220. Kamehuru, Lobor, Central 
Province, Uganda. 
Allied to Hpimys c. neumant Hell., smaller in size and without 
any bufi-coloured suffusion on the ventral surface. 
General proportions less than in newmani and effectws Dollm., 
hind foot only 20-22 mm. in length. 
Colour of dorsal surface dark brown, between ‘‘olive-brown” and 
. S ” . 2 i . ". |. a 
st hair-br own (Ridgway, 1912), lined with black and washed over 
with pale buff, this latter tint most dominant on the flanks and 
