MAMMALS OF ANGLO-EGYPTIAN SUDAN — SETZER 487 



Fatima, 1; Port Sudan, 1; Letti Basin, 1; Khor Hanoieit, 4; eastern 

 Egyptian desert, lat. 22° N., long. 35° E., 8. 



Measurements: An adult male from Shendy measures as follows: 

 Length of head and body 67; length of tail 111 ; length of hind foot 22; 

 length of ear 11; greatest length of skull 24.4; condyloincisive length 

 21.6; length of anterior palatine foramina 3.9; crown length of upper 

 molar series 3.1 ; length of auditory bullae 9.4; least interorbital width 

 4.5; length of nasals 8.7; width of rostrum at level of antorbital fora- 

 men 2.5; greatest width across zygomatic arches 12.6; greatest breadth 

 of braincase 12.5. 



Remarks: Gerhillus watersi may be distinguished from G. stigmonyx 

 by its smaller body size but the same or nearly the same tail length and 

 by the shghtly redder color, except near the Red Sea where both 

 species are nearly the same faded dun color. This same Hghtening 

 in intensity of color is also seen in G. pyramidum and in G. g. sudanensis, 

 both of which occupy the same geographic range. 



The skulls of watersi may be separated from those of stigmonyx 

 by their smaller size, less open pterygoid fossae, narrower rostra, 

 smaller cheekteeth (relatively, as well as actually), larger budae, and 

 the smaller anterior palatine foramina of the former. 



Gerhillus gerhillus agag Thomas 



Figure 5,a 



Gerhillus agag Thomas, Proc. Zool. Soc. London, p. 296, August 6, 1903. 

 (Agageh Wells, western Kordofan.) 



Specimens Examined: Twenty-one, all in BM, from: 25 miles west 

 of En Nahud, 1 ; east of En Nahud, 1 ; 100 miles west of En Nahud, 2; 

 56 miles east of El Fasher, 1 ; Sayah, 60 miles northeast of El Fasher, 3 ; 

 55 miles north of El Fasher, 2; 40 miles west of El Fasher, 4; 90 mUes 

 northeast of El Fasher, 1 ; 105 miles northeast of El Fasher, 1 ; 19 miles 

 north of El Fasher, 1; El Fasher, 2; Khartoum, 1; Umm Keddada, 1. 



Measurements: An adult male from El Fasher and an adult 

 female from 19 miles north of El Fasher measure, respectively, as 

 follows: Length of head and body 78, 80; length of tail 119, 113; 

 length of hind foot ?, 23; length of ear 13, 14; greatest length of skidl 

 29.0, 27.1 ; condyloincisive length 25.2, 23.3; length of anterior palatine 

 foramina 5.2, 4.3; crown length of upper toothrow 3.9, 3.9; length 

 of auditory bullae, 10.4, 9.6; least interorbital width 5.5, 5.4; length 

 of nasals 11.1, 11.2; width of rostrum at level of antorbital foramen 

 3.0, 2.8; greatest width across zygomatic arches 14.0, 14.2; greatest 

 breadth of braincase 13.8, 13.8. 



Remarks: The type of G. g. agag is an adult male from Agageh 

 Wells. The standard external measurements are 87-100-24-11. 



