GERBILLUS ANDEESONI. 
259 
this Nubian form have been obtained, it may be as well to retain it under F. Cuvier’s 
name, G. 'pygargus^ 
I do not think there is much doubt that the gerbil from Dongola, mentioned by 
Heuglin, also belonged to this species ; but until specimens have been obtained from 
that locality it is impossible to say definitely.— W. E. db W. 
Gerbillus andersoni, de Winton. 
Gerbillus andersoni, de Winton, Ann. Mag. Nat. Hist. ser. 7, vol. ix. 1902, p. 45. 
3 d j 3 ? . Mr. J. Ker. Mandara. In alcohol. 
Ihis species is best described as a miniature of G. pyvcL'miduTYi^ having the dark 
tipped fur, the dark whiskers, the black-bordered ears, and the inclination to yellowish 
stain on the white of the under side characteristic of that species. 
The extent of the hair on the soles of the feet and the slight development of the 
brush-hairs towards the end of the tail are also much as in G, 'pyTaTyiiduTn. In 
size it closely resembles G. gerhillvs, but the ears are longer. 
Measurements taken from specimens preserved in alcohol. 
d- d. $. $. 
min. mm. mm. mm. 
Head and body. 85 89 89 87 
. 125 117 120 115 
foot. 27 27 27-5 27 
. 15-5 16 15-5 155 
A three-parts-grown female has the hind foot 25 mm. in length. 
Skull-measurements. 
Greatest length. 
„ breadth . 
Least supraorbital constriction . 
Length of nasals. 
Basal length. 
Length of incisive foramina . . 
„ molar series . . . 
mm. 
30 
16 
5-5 
12 
25 
5-5 
4-3 
mm. 
30 
16 
6 
12 
24 
4-3 
mm. 
30 
16 
5-9 
12 
25 
5*5 
4-4 
Ihe skull is rather larger than that of G. geThilliis and is readily distinguished by its 
longer nasal portion, the more expanded maxillary portion of the zygomata, the larger 
teeth and longer incisive foramina. 
The type of the species is a skin, number 92.7.1.5 in the British Museum, collected 
2l 2 
