262 
THE MAMMALS OE EGYPT. 
nasals 10‘5 ; frontal constriction 5; basal length 23; palatal length 11’5; incisive 
foramina 5 ; length of molars 4; Avidth outside molars 5'7. 
The facial portion of the skull is long, the nasals are slightly dilated in the middle 
of their length, the maxillary portion of the zygomatic arch is wide and the 
squamosal portion is distinctly wider than the cranium ; the base of the skull is broad, 
and the auditory bullse large and full. 
F. Cuvier mentions Meriones quadrimaculatus, Ehrenberg,” as a synonym of 
Gerbillus wgyptius in his paper on the Gerbils, published in the Trans. Zool. Soc. 
vol. ii. It was most probably only a manuscript name and may or may not have been 
applied to a gerbil of this group; but Lataste has employed it for a Mouse-Gerbil 
from Egypt, of which he did not know the exact origin, and to which he linked a very 
incomplete skull and a lower jaw of doubtful origin which was found in the same 
draAver in the Paris Museum. This name is now more definitely fixed on the animal 
under notice.— W. E. be W.] 
Dipodillus amcenus, de Winton. 
Dipodillus amcenus, de Winton, Ann. Mag. Nat. Hist. ser. 7, vol. ix. 1902, p. 46. 
2 d', $ . Province of Gizeh. Dr. C. W. Andrews and Mr. H. S. L. Beadnell. 
Smaller than J). quadrimaculatus ; form compact; ears small; tail about half as long 
again as the head and body ; hind feet long, Avith the three proximal pads very 
ill-defined. Colour very dark; the fur mouse-grey tipped with reddish fawn, the latter 
colour predominating on the sides. A vei'y pale almost white patch on the buttocks. 
Tail dark blackish above, favvn beneath; the pencil and crest black-broAvn. The face 
is handsomely marked; the tip of the nose and the front portion of the moustachial 
area is pale to white; a very distinct dark nose-spot commences immediately above the 
nostrils, and fades away into the general rich colour of the forehead; dark branches of 
this spot extend down the hinder part of the moustachial area; there is a pale spot 
immediately in front of the eye; the cheek beneath the eye is red-fawn, with a distinct 
dark smoky patch behind the eye and beneath the ear. The ears dark blackish, 
except at their bases. The Avhole of the under parts and the hands and feet Avhite. 
Measurements taken from specimens preserved in alcohol. 
No. 1 (type). No. 2 . No. 3. 
c?.‘ d. $. 
mm. mm. mm. 
Head and body. 72 74 73 
Tail.... 112 92 imperfect. 105 imperfect. 
Hind foot. 23-5 21 5 23 
Forearm and hand. 23 23 23 
Ear. 11 11 11 
