EAST AFRICAN MAMMALS, SUS 
forming a yellowish line between the dark flanks and pale under- 
parts. Backs of hands and feet white. Ventral surface of body 
slate-grey washed with white. Tail short, rather paler below 
than in newmant. 
Skull small and slight in build, very like that of the other 
races of coucha. 
Dimensions of the type (measured in the flesh) :— 
Head and body 87 mm.; tail 100; hind foot 21; ear 19. 
Skull: greatest length 28 mm.; basilar length 22; condylo- 
incisive length 25:7; zygomatic breadth 13:2; interorbital 
constriction 4; breadth of brain-case 12; length of nasals 11:2; 
palatilar length 12°6; length of palatal foramina 7; alveolar 
length of upper molar series 5. 
Type. Adult male. B.M. No. 13.10.18.99. Original number 
220. Collected on February 14th, 1913. 
While working on this group of multi-mammate mice I have 
come to agree with Heller in considering the forms newmanc, 
panyd, effectus, and other allies as races of cowcha, and as such I 
have described this Kamchuru mouse. 
46, 'THAMNOMYS SURDASTER, subsp. 
3. 87. Lengototo, B.H.A. 
This specimen is so young that it is impossible to say to which 
of the many races of surdaster it belongs. 
AT, ZELOTOMYS HILDEGARDE® Thos. 
@. 76. West of Leganisho, B. EH. A. 
So WB. Wem, Jods 
6. 5. Mt. Suswa, B.E.A. 
The general external characters of this genus are well illustrated 
in these three specimens. ‘The light coloured tail (due to the white 
skin more than to the colour of the short hairs covering same), 
the pale hands and feet, and thick, soft fur readily distinguish 
these mice from the members of the allied genus Ypimys. 
48, LopHuRomys ZENA Dollm. 
OF OAS Maw. HieAs 
49, Acomys 1enitus Dollm. 
©. 96,98. Narossura River. 
¢. 108. Southern Guaso Nyiro. 
50. Acomys ABLUTUS Dollm. 
g. 164. Near the Ngamatak Hills, Turkwel River. 
51. ARVICANTHIS STRIATUS MASSAICUS Pagenst. 
@. 51; @. 47, 52,-53, 54. Amala River. 
52. ARVICANTHIS ABYSSINICUS NAIROB& Allen. 
6. 94; 2. 92. Lengototo, B.E.A. 
These two specimens appear very similar in colour to the 
Nairobi Arvicanthis. 
