268 
THE MAMMALS OF EGYPT. 
Palm with five tubercles, two large ones immediately below the wrist at its middle, 
slightly above the level of the rudimentary thumb, and with three small tubercles 
anterior to them, one at the base of the second, another at the base of the fifth, and 
one common to the bases of the third and fourth fingers. The whole palm anterior to 
the wrist-tubercles and around the others is covered with minute granules. The skin 
beneath the digits strongly transversely ridged. There are five small tubercles on the 
sole of the hind foot surrounded by five granular tubercles, one lying at the bases of 
the first, second, and fifth, and one common to the third and fourth toes. The finders 
and toes have much the same proportions to one another as in Gerbillus. The length 
from the elbow to the end of the middle finger (less claw) considerably exceeds the 
length from the heel to the tip (less claw) of the middle toe, which is exactly the 
reverse of what occurs in Gerbillus gerbillus and G. 'pyramidum, in which the fore 
limb is much shorter relatively to the foot. The moustachial hairs are moderately 
long, and are almost wholly either black or white. The wrist behind the tubercles is 
sparsely covered with hairs, as are also the under surfaces of the fingers, but the middle 
of the palm is naked. The sole generally, including its middle, is sparsely covered 
with hairs, and the toes also, on which, however, the hairs are longer, but the middle 
of the tarsus has generally a naked area, where the skin is of a livid hue. The claws 
are moderately well-developed. Tail ringed, clad sparsely all round with rather stiff 
semi-erect hairs, measuring 3 mm. in length on the dorsal surface, becoming towards 
the end about 17 mm. long. A long oval sebaceous gland on the middle of the 
abdomen. 
The glans penis is more or less cylindrical and smooth. 
Measurements taken from specimens preserved in alcohol. 
d. 
d. 
2. 
mm. 
mm. 
mm. 
mm. 
Head and body .... 
124 
138 
139 
Tail. 
(imp.) 
128 
132 
Hind foot. 
34 
33 
33-5 
Ear. 
19 
(imp.) 
18'5 
Measurements of skull. 
d. 
d. 
mm. 
mm. 
Greatest length . . . . 
41 
39 
„ breadth . . . . 
24-5 
23 
Length of nasals . . . . 
15 
13-2 
Basal length. 
36 
34 
Length of palate . . . . 
18 
17-5 
„ incisive foramina 
8-5 
7T 
„ molar series . , 
6 
6 
