MAMMALS OF ANGLO-EGYPTIAN SUDAN — SETZER 489 



Gerbillus nancillus Thomas and Hinton 



Gerbillus nancillus Thomas and Hinton, Proc. Zool. Soc. London, p. 260, July 6, 

 1923. (Plains of Darfur, 45 miles north of El Fasher.) 



Specimens Examined: Three, all in BM, from: Haraza, 1; 16 miles 

 east of El Fasher, 1; 45 miles north of El Fasher, 1. 



Measurements: The measurements of the type, an adult female, 

 are as follows: Length of head and body 54; length of tail 79; length of 

 hind foot 17; length of ear 11 ; greatest length of skull 20.5; condyloin- 

 cisive length 17.8; length of anterior palatine foramina 3.0; crown 

 length of upper toothi'ow 3.4; length of auditory bidlae 7.4; least 

 interorbital width 3.9; length of nasals 6.9; width of rostrum at level 

 of antorbital foramen 2.4; breadth of braincase 10.8. 



Remarks: This diminutive gerbil is in color about like G. g. agag, 

 but much smaller. The white on the nose, sides, cheeks, and post- 

 auricular spots is more extensive than in agag. The tail appears almost 

 white except for the minute blackish brush on the distal one-third of 

 the tail. This "brush" is scarcel}^ deserving of the name since it is 

 composed merely of blackish hairs a trifle longer than the lighter 

 hau's meeting it. 



Gerbillus pyraniidum pyramidum E. Geoffroy 



Gerbillus pyramidum E. Geoffroy, Catalogue des mammif feres du Museum National 



d'Histoire Naturelle, p. 202, 1803. (Near Pyi-amids of Giza, Giza Province, 



Egypt.) 

 G[erbillus] burtoni F. Cuvier, Trans. Zool. Soc. London, vol. 2, p. 145, May 4, 



1838. ("Dahrfur"; according to Flower, the type was an animal which 



James Burton took to Paris alive in 1833.) 

 Meriones dongolanus Heuglin, Reise in Nordost-Afrika, vol. 2, p. 79, 1877 



(Dongola.) 



Specimens Examined: Sixty-eight, all in BjM, from: Khartoum, 

 10; Erkowit, 5; Nubia, 1; Dongola, 3; Sabaluka, 2; Shendy, 11; Port 

 Sudan, 4; Khor Hanoieit, 9; Shereik, 2; Kerma, 7; Hamza, 6; Haraza, 

 3; Merowe, 2; Tagbo Hills, 1; Jebel Meidob, 2. 



Measurements: An adult male and an adult female from Khar- 

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

 109; length of tail 129, 135; length of hind foot 30, 30; length of ear 

 15, 15; greatest length of skull 31.7, 32.5; condyloincisive length 27.3, 

 28.1; length of anterior palatine foramina 5.7, 5.6; crown length of 

 upper toothrow 4.3, 4.4; length of auditory bullae 11.3, 11.2; least 

 interorbital width 5.8, 6.1 ; length of nasals 12.1, 12.3; width of rostrum 

 at level of antorbital foramen 3.3, 3.3; greatest width across zygomatic 

 arches 16.6, 16.4; greatest breadth of braincase 15.6, 15.4. 



