ALLEN: MAMMALS FROM THE BLUE NILE VALLEY. 329 
body is 83% in Heuglin’s specimen, 85% in our immature individual. 
In the adult the tail is relatively shorter — 73%; and the measure- 
ments of the fresh specimen were:—-head and body 112, tail 82, hind 
foot 18,ear 15. The entire dorsal region from nose to base of tail is 
smoke gray, becoming pale clay-color on the cheeks and sides of the 
body. ‘The forearms and outer sides of the metacarpal and bases of the 
metatarsal areas are gray like the back, and the tail is similar above. 
The ventral surfaces, a spot below the eye, and at the base of the ear 
are white. Capt. Stanley S. Flower, of the Gizeh Zodlogical Gardens, 
generously presented an adult Acomys in alcohol taken June 19, 
1912, at Eneikliba in Sennar Province, which is unquestionably the 
same animal. The short, broad hind feet and the relatively short 
tail (85 mm.) are equally characteristic. 
In the Novitates zoologicae, (1901, 8, p. 400) de Winton describes 
as new, Acomys witherbyi, type from Kawa, south of Khartoum. He 
compares it with A. nubicus of Heuglin, from Middle Egypt, and men- 
tions specimens from Shendi and Gebel Auli in the Nile Valley. It 
seems very close to cineraceus, with which it appears to agree in all 
essential characters, so far as the description goes. Possibly the two 
are identical, and cineraceus should apply to the Acomys of the level 
country of this part of the Nile Valley. 
ACOMYS HUNTERI deWinton. 
Hunter’s Spiny Mouse. 
Acomys hunteri de Winton, Novitates zoologicae, 1901, 8, p. 401, footnote. 
Among the rock crevices of Gebel Fazogli, at the Abyssinian border, 
there occurred a second species of Acomys, which from descriptions 
alone, I am unable to differentiate from hunteri, the type of which 
came from the plains of Tokar, near Suakin, on the Red Sea. This 
_ Is described as red fawn above, white beneath, which is practically as 
in an adult from Fazogli, except for the darker spines of the head and 
back. A younger individual is grayer dorsally, the sides pale ochra- 
ceous. ‘The measurements given are:— head and body 105, tail 102, 
_ foot 17.5, ear 16. Our two specimens measure:— head and body 
104, 101, tail 98, 96, foot 18, 19, ear 16, 16. It will be observed that 
the tail is about 94 or 95 (in the type 97) per cent of the length of head 
and body, hence much longer than in cineraceus. It differs strikingly 
also in its slenderer feet, which are pure white instead of darker. 
