MAMMALS OF ANGLO-EGYPTIAN SUDAN — SETZER 541 



Steatomys gazellae Thomas and Hiiiton 



Figure 8,6 



Steatomys gazellae Thomas and Hinton, Proc. Zool. Soc. London, p. 265, July 6, 

 1923. (Temburas.) 



Specimen Examined: The type. 



Measurements: There are no external measurements available for 

 the type, an adult male, but the skull measures as follows. Condyloin- 

 cisive length 24.0; length of anterior palatine foramina 5.1; crown 

 length of upper toothi'ow 4.5; least interorbital width 4.3; width of 

 rostrum at level of antorbital foramen 3,4. 



Remarks: The color of the pelage is dark brown above, passing 

 over the sides and abruptly terminating in the white of the belly. 

 The auditory bullae are large and the anterior palatine foramina are 

 widely open. 



Again, no comment can be made on the relationship of this species 

 since it is known only from the type specimen. 



Steatomys thomasi, new species 



Figure 8,& 



Type: CNHM No. 79517, adult male, skin and skull, from Torit, 

 Equatoria Province, Anglo-Egyptian Sudan. Obtained January 26, 

 1952, by J. S. Owen. 



Specimens Examined: Twenty-three, from: Torit, 22 (2 MCZ); 

 Ikoto, 1. 



Diagnosis : General over-all dorsal color near Buffy Brown abruptly 

 terminating on sides in the pure white of the belly. Tail indistinctly 

 bicolor. Dorsal surfaces of hands and feet, entire underparts, upper 

 lips, and subauricular spot pure white. Skull of average size for the 

 genus, upper cheekteeth relatively large, anterior palatine foramina 

 large but straight-sided, auditory bullae relatively large, and inter- 

 orbital region relatively narrow. 



Measurements of the Type Specimen: Length of head and 

 body 70; length of tail 32; length of hind foot 12; length of ear 10; 

 greatest length of skull 20.5; condyloincisive length 18.8; greatest 

 width across zygomatic arches 10.6; crown length of upper toothrow 

 3,1 ; least interorbital width 3.4; width of rostrum at level of antorbital 

 foramen 2.9; length of nasals 8.0. 



Comparisons: From Steatomys aguilo, Steatomys thomasi differs in 

 more open anterior palatine foramina, and markedly darker colored 

 upper incisors whose anterior face is much more strongly curved, 

 that is, the radius of a circle formed by the curve of the incisors is 

 markedly less. Since the rest of the skull of the type of aguilo is so 



