MAMMALIA. 
59 
parts it is ashy-grey at the base and for the greater part of its length, pale sandy-brown 
near the end, the extreme tip dusky brown; on the lower parts it is white throughout. 
Ears about half the length of the head, oval, naked inside, thinly clothed with short brown 
hair outside ; face sandy; the hairs grey at the base ; sides of head whitish; whiskers, as 
usual, very long, exceeding 3 inches; the uppermost brown, the longest white, except at 
the base, the lower entirely white ; the long hairs beneath the hind-feet all white, as are the 
feet throughout. 
The following dimensions, doubtless from the freshly killed animal, are marked by 
Dr. Stoliczka on the label of the specimen from Koslitak :— 
Inch. 
Whole length, tail included ...... 
11-75 
Length of tail (hairs at end included apparently) 
6-75 
Distance from snout to eye. 
0-7 
Do. eye to ear ...... 
0-25 
Length of ear measured behind ..... 
0-75 
Breadth of do. ....... 
0-55 
Length of fore-foot and claws ..... 
0-55 
Do. hind-foot ....... 
0-8 
Do. tarsus ........ 
1-75 
Length of foot (hind-leg) measured from knee. 
4 
In dried specimens the ear measures O'65 from the orifice, 
hind-foot from calcaneum to end of claws 2*35. 
The following are the dimensions of an adult skull:— 
and 0*5 in width; tarsus and 
Metre. 
Inches. 
Length .......... 
. -033 
1*3 
Breadth across zygomatic arches ..... 
. *021 
0-84 
Length of nasal bones’ ....... 
. -013 
0-52 
Breadth of do. behind ....... 
. -003 
0-12 
Do do. in front ...... 
•004 
0-16 
Height of orbit ........ 
. -008 
0-3 
Breadth of do. . 
. -0045 
0*18 
Breadth of frontal region between orbits .... 
. -010 
0-4 
Length of molars of upper jaw taken together • 
. -006 
0-23 
Breadth of palate between last molars .... 
. -004 
0-15 
Length of lower jaw from angle to symphysis . 
. *0155 
0-6 
Height of do. . 
•0075 
0-29 
The dentition agrees with Brandt’s description. There are 
4 molars in 
the upper jaw. 
3 in the lower, on each side; the anterior upper molar is minute, simple, almost cylindrical; 
the other three each with 3 convex folds outside, the anterior fold being much smaller than 
the others, and two folds inside; in the lower jaw the anterior molar has 
3 folds inside. 
2 outside, the second 3 folds on each side, the third 2 folds outside, hut no distinct fold 
inside, a groove which occurs there being confined to the crown of the tooth and doubtless 
disappearing in older skulls. 
This species was described by Lichtenstein from a pair obtained by Eversman, on his 
return journey from Bokhara, in the deserts near the Sea of Aral. Severtzoff includes it 
in the list of animals found in Western Turkestan. 1 It is a typical Dipus. D. jaculus , 
D. acontion , D. sagitta var. telum , and D. platyurus are also said by Severtzoff to be 
found in the same country. 
1 Turk. Jev., p. 62; Ann. Mag. 
Nat. Hist., July, 1876, Ser. 4, xviii, p, 56. 
