28i 
THE MAMMALS OE EGYPT. 
Desmarest, in describing the “Spiny Mouse” from Cairo, mistook the ill-drawn 
figure of “ rEchimys de I’Egypte ” (plate v. fig. 2)—which was intended for the 
Arvicanthis, as already mentioned—for this animal; but his description was founded 
on the Museum specimen of the true Alus caldrinus of Geoffroy’s MS. catalogue, as 
he remarks later on in the ‘ Encyclopedic.’ Mus caJiirinus was never mentioned in 
the work by Geoffroy and Audouin.—W. E. de W.] 
Acomys dimidiatus, Cretzschm. (Plate XLVITI.) 
Mus dimidiatus, Cretzschm. Riipp. Atlas, 1826, p. 37, Taf. 13. fig. a. 
Mus liispidus, Brants, Muizen, 1827, p. 154 (nee GeofFr. nec Licht.). 
Mus megalotis, Licht. Darstellung, 1829, pi. 37. fig. 2. 
Acomys dimidiatus, Tristram, Faun. Palest. 1884, p. 10, pi. hi. fig. A 
d . Wadi Sikait, S. of Gehel Zehan, E. Egypt. Mr. D. MacAlister. British Museum, No. O.5.9.2. 
Larger and more slender in form than A., hunteri] ears very large; tail about 
the length of the head and body, somewhat coarsely scaled; hind legs and feet rather 
long. The whole body covered with semicircular flattened spines. Colour brown- 
fawn, darker on the back, clearer fawn on the sides; all the under parts white. 
Approximate measurements:—Head and body 110 mm.; tail 108; hind feet 20-5 ; 
ear 21. 
The single Egyptian specimen available is a skin in poor condition ; a specimen in 
alcohol from Sinai, also in the British Museum (No. 94.7.20.1), collected by Mr. E. N. 
Buxton, which may be taken as typical of the species, is apparently similar in form and 
colour. 
The Plate was prepared from specimens obtained by Mr. Bent in the lladramut, 
which seem to agree wuth the specimen from Egypt in all essential features, so far as 
can be judged from the poor condition of the latter.— W. E. de W. 
Acoaiys huxtepj, de Winton. (Plate XLIX.) 
Acomys hunttri (Anderson), List of Animals Zool. Soc. Lond. 1896, p. 123 (nora. nud.) 
Trouessart, Cat. Marnm. 1899, p. 496 (nom. nud.) ; de Winton, Novitates Zool. vol. viii. 1901, 
p. 401 (nota). 
$ . Suakin. Major Penton, R.A.M.C., D.S.O. 
cJ ? $ . Plain of Tokar. 
[Larger than A, caldrinus ; form robust; ears moderate, rounded ; tail rather shorter 
than head and body, somewhat finely ringed ; feet very short and broad. The coat 
