494 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iM 



crown length of upper toothrow 5.5: length of auditory bullae 9.9; 

 depth of braincase at level of auditory bullae 13.6. 



Remarks: This species may be distinguished from T. henrenuta by 

 its generally smaller size, Ughter color, and conspicuous brush at the 

 tip of the tail. 



Tatrra robusta taylori Hatt 



Figure 5,b 



Tatrra robusta taylori Hatt, Amer. Mus. Nov., Xo. 791, p. 1, April 11, 1935- 

 (Khor Birum, Red Sea HiUs.) 



Specimens Examined: TVenty, all in BM, from: Sinkat, 2; Soba, 

 6; El KoAva, 3; Shendy, 6; Tarimmiel, 1; Roseires, 1; Seimaar, 1. 



Measurements: An adult male from Sinkat measures as follows: 

 Length of head and body 129; length of tail 174; length of hind foot 

 37; length of ear 21; condyloincisive length of skull 32.0; greatest 

 length of skull 39.6; least interorbital width 6.8; length of nasals 16.5; 

 crown length of upper tootlirow 5.9; length of auditorj" bullae 10.3; 

 depth of braincase at level of auditory bullae 14.1. 



Remarks: This subspecies is somewhat paler in general, over-all 

 color than is the nominate form from Kordofan. The auditory bullae 

 are markedly less inflated and the anterior palatine foramina are shorter 

 than in robusta. The hamulae are shorter and lighter in structure. 



As the Nile or the Abyssinian highlands are approached, the color 

 of the pelage tends to darken. 



Tat era soror G. M. .AJleii 



Figure o,b 



Tatera soror G. M. Allen, Bull. Mus. Comp. Zool., vol. 58, p. 333, Juh- 1914. 

 (Fazogli, Blue Nile.) 



Specimen Examined: The t3-pe. 



Measurements: The type, an old adult female, measures as fol- 

 lows: Total length 299; length of tail 158; length of hind foot 34; 

 length of ear 20; condyloincisive length of skull 34.6; greatest length 

 of skull 38.4; greatest width across zygomatic arches 20.2; least inter- 

 orbital width 6.4; length of nasals 16.3; crown length of upper tooth- 

 row 6.2; length of auditorj' bullae 10.2; depth of braincase at level of 

 auditory bullae 14.3. 



Remarks: The species soror is the smallest of the species of Tatera 

 occurring in the Sudan. The auditory bidlae are small; the rostrum 

 is narrow; and the cheekteeth are as wide as in bevvenuta but not so 

 massive as in fiaiipes. The anterior palatine foramina are markedly 



