500 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



in 1916 in which he proposed the name rujus with the type locality 

 at El Obeid. Certainly the material available for study has shown 

 that the animals from the vicinity of El Obeid are different than any 

 of the surrounding kinds and that the name rujus should stand. It 

 is also apparent that the name T. e. anthonyi is valid but that the 

 range of this subspecies lies between the Nile and the Nuba Mountains, 

 where the characters of rufus and anthonyi blend. 



Desmodilliscus braueri Wettstein 



Desmodilliscus braueri Wettstein, Anz. K. Akad. Wiss. Wien, Math. -Nat., vol. 53, 

 p. 153, 1916. (Between Um Ramad and Nubbaka, south of El Obeid, 

 Kordofan.) 



Specimens Examined: Two, both in BM, from: 75 miles west of 

 El Obeid, 1; 140 miles east of El Fasher, 1. 



Measurements: An adult male from 75 miles west of El Obeid 

 measures as follows: Length of head and body 57; length of tail 45; 

 length of hind foot 15; greatest length of skull 21.8; condyloincisive 

 length 18.5; crown length of upper toothrow 2.9; length of auditory 

 bullae 9.3; least interorbital width 4.0; length of nasals 7.7; width of 

 rostrum at level of antorbital foramen 2.6. 



Remarks: This is a small, short-tailed, silk}^ furred mouse with 

 pronounced postauricular white spots. The hind feet are long in 

 proportion to the body. The skull is small but robust and with the 

 auditory bullae occupying an inordinate amount of the total size. 

 The bullae are readily visible from above and encompass the condyles 

 below. Both pairs of palatine foramina are long and wide open. 



Meriones libycus pallidus Bonhote 



Meriones crassus paUklus Bonhote, Abstr. Proc. Zool. Soc. London, No. 103, p. 3, 

 February 13, 1912. (Atbara.) 



Specimens Examined: Eight, all in B^'vl, from: Atbara, 3; Berber, 

 2; Shereik, 1; Kerma, 2. 



Measurements: An adult male and an adult female from Atbara 

 measure, respectively, as follows: Length of head and body 127, 126; 

 length of tail 110, 130; length of hind foot 28, 31 ; length of ear 17, 16; 

 greatest length of skull 39.9, 38.5; condjdoincisive length 35.4, 33.5; 

 crown length of upper toothrow 4.9, 4.8; length of auditory bullae 

 16.4, 16.1; greatest width across zygomatic arches 21.1, 19.5; least 

 interorbital width 6.5, 5.8; length of nasals 14.3, 14.3; breadth of 

 braincase 22.2, 21.5. 



Remarks: The genus Meriones is a North African element pene- 

 trating along with the desert into northern Sudan from Egypt, Its 

 main distribution lies to the north and east into western Asia. 



