536 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



Moli, 35 miles west of Torit, 2 (MCZ); Lafon, 60 miles north of 

 Torit, 3 (MCZ) ; Opari, 25 miles north-northeast of Nimule, 3 (MCZ) ; 

 Okaru, 25 miles west of Torit, 2 (MCZ). 



Measurements: An adult male and an adult female from Nimule 

 measure, respectively, as follows: Length of head and body 100, 101; 

 length of tail 90, 105; length of hind foot 18, 18; length of ear 12, 14; 

 greatest length of skull 28. 6, 29.0; condyloincisive length 26.0, 26.3; 

 crown length of upper toothrow 4.9, 4.5; width of rostrum at level 

 of antorbital foramen 6.0, 6.1; least interorbital width 4.7, 4.8; 

 greatest width across zygomatic arches 13.9, 13.8; length of nasals 

 10.8, 11.2. 



Remarks: These specimens vary somewhat from the type series of 

 hystrella in that they present a slightly redder appearance. This may 

 be due, however, to the present skins being fresher and less faded 

 than the original series. In three of the specimens in the fresh series, 

 the grayish color on the back is more pronounced than in the rest. 

 The skulls, however, are somewhat narrower than in the type series, 

 but this is the only departure in cranial features. 



Acomys intermedius Wettstein 



Figure 8,a 



Acomys intermedius Wettstein, Anz. K. Akad. Wiss. Wien, Math. -Nat., vol. 53, 

 p. 161, 1916. (Dilling.) 



Specimens Examined: Eight, all in BM, from: 60 miles west of 

 Obeid, 2; 75 miles north of El Obeid, 1; 50 miles west of El Obeid, 1; 

 20 miles west of Nahud, 1; 40 miles west of Nahud, 1; 10 miles east 

 of Nahud, 1 ; 10 miles west of Nahud, 1. 



Measurements: An adult male from 20 miles west of Nahud 

 measures as follows: Length of head and bod}^ 94; length of tail 86; 

 length of hmd foot 16; length of ear 14; length of anterior palatine 

 foramina 6.1; crown length of upper toothrow 4.0; least interorbital 

 width 4.4; width of rostrum at level of antorbital foramen 2.9; length 

 of nasals 9.8; greatest width across zygomatic arches 12.3. 



Remarks: There is no evidence of intergradation exhibited in any 

 of the specimens examined, so that while these animals resemble 

 cahirinus they appear not to interbreed with them and are so left 

 as a full species until a complete study is done on the genus as a 

 whole. 



Acomys lowei, new species 



Figure 8,a 



Type: BM No. 23.1.1.270, adult male, skin and skull, from 40 miles 

 west of El Fasher, Darfiu- Province, Anglo-Egyptian Sudan. Ob- 

 tained Feb. 13, 1921, by L3mes and Lowe, original No. 477. 



