312 MR. GUY DOLLMAN ON 
Type. Adult male. B.M. No. 13.10.18. 64. Collected January 
Nrfislo, IS), 
The donor and collector are to be congratulated on the dis- 
covery of the genus Gerbillus on the Turkwel River. The 
Somali species would appear to be the nearest ally of this new 
form, though doubtless further collecting will bring to light 
several other races of East African Gerbillus. 
29. TATERILLUS EMINI Thos. 
Ge 2022038204206. Dike QS e219 ORe 205 ea A Moe 
Kamehuru, Lobor, Uganda. 
3S. 225. Falabek, 45 miles east of Nimule. 
The general colour of this series is very much as in the type, 
a specimen collected by Emin Pasha at Wadelai. The young 
specimen are all rather darker than the adults, especially on the 
back and hind quarters. 
30. TATERILLUS LOWEI Dollm. 
Abstract P. Z. 8. 1914, p. 25. (April 14.) 
g. 165. 10 miles west of the Negamatak Hills, Turkwel 
River. Altitude 1800 feet. é' 
A very pale coloured species allied to Taterills nabiles Dollm. 
In general proportions this Gerbil is quite similar to mubilius 
and the allied forms. 
Colour of dorsal surface pale dirty yellow, a mixture of ** vina- 
ceous-buff” and “ warm-buff” (Ridgway, 1912); the central 
portion of the back is rather darker, owing to the dark hair- 
tips being more developed. Flanks purer and yellower in colour. 
Head same colour as back; sides of face as in nwbiluws, but rather 
paler. Backs of hands and feet creamy white. Mntire ventral 
surface pure white. ‘Tail much as in nwbhilus but paler, and with 
the cream-white ventral surface more sharply marked off from 
the dull upper surface. 
Skull very like that of nwdilus, slightly smaller throughout. 
Dimensions of the type (measured in the flesh) :— 
Head and body 107 mm.; tail 160; hind foot 28; ear 18. 
Skull: greatest length 343 mm.; basal length 28°3; zygo- 
matic breadth 16°5; length of nasals 13°5: width of brain-case 
(across squamosal region) 145; interorbital constriction 6; 
length of anterior palatal foramina 5°8; length of posterior 
palatal foramina 3-5; alveolar length of upper moiar series 4°8. 
Type. Adult male. B.M. No. 13.10.18.66. Collected on 
January 15th, 1913. 
This species is the palest of all the East African forms, the 
only members of the genus at all similar in colour being the 
West African species Vaterillus lacustris and Taterillus mgeric. 
31. TATERA NIGRICAUDA Pet. 
$. 107; 2. 113,114. Southern Guaso Nyiro. 
