GEEBILLUS PTGAEGUS. 
257 
Gen. Sir Holled Smith, when Governor of Siiakin, was the first to record this 
species in that district; the specimen was forwarded to the British Museum through 
Dr. Anderson in 1892, 
Dr. Anderson obtained many specimens on the plains of Suakin and Tokar in 
January 1894, assisted by Sir Archibald Hunter and his officers. Major Fenton states 
that gerhils swarm at Durrur, and devour the crops to such an extent as to be a 
perfect pest. 
Messrs. Eothschild and Wollaston found this species plentiful about Shendi. 
Measurements of specimens preserved in alcohol, from Suakin. 
d. 
d. 
$. 
mm. 
mm. 
mm. 
Head and body . . . ... 
97 
102 
Tail (without terminal hair) . . . . 
. . . . 146 
152 
145 
Ear „ „ . . . , 
. . . . 17 
15-5 
16 
Hind foot. 
, . . . 29 
30 
27-5 
Measurements of fresh-killed specimens, from Shendi, as recorded on the 
collectors’ labels of specimens in the British Museum. 
d. 
d- 
$• 
mm. 
mm. 
mm. 
Head and body. 
. . 100 
91 
90 
Tail (without terminal hair) . . . 
. . 148 
150 
145 
Ear. 
. . 14 
13 
14 
Hind foot. 
28 
28 
Measurements of skulls. 
Shendi. 
Suakin 
r- 
> 
d. 
d. 
d. 
$. 
mm. 
mm. 
mm. 
mm. 
Greatest length. 
32-5 
33 
31-5 
31 
„ breadth. 
17 
16-9 
16-5 
16-8 
Least supraorbital constriction . . 
6-5 
6T 
6T 
6T 
Length of nasals. 
12-7 
13T 
12 
. . . 
Basal length. 
27-3 
28-5 
26 
26 
Length of incisive foramina . . . 
6 
6 
5'9 
6T 
,, molar series. 
4*5 
• • • 
4-5 
4-5 
The description given by Frederic Cuvier of 
G. hurtoni, and the figure of the teeth, 
do not fit this species satisfactorily, yet we 
are assured by Lataste (Cat. Mamm. 
Tunisie, 1887, p. 25) that the type in 
the Paris Museum belongs to a 
gerbil of this 
form, so G. hurtoni may be regarded also as a synonym. 
2l 
