496 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i06 



Taterillus congicus Thomas 



Figure 5,b 



Taterillus congicus Thomas, Ann. Mag. Nat. Hist., ser. 8, vol. 16, p. 147, August 

 1915. (Poko, Upper Uele River, Belgian Congo.) 



Specimens Examined: Three, all in BM, from: Wan, 2; Yei, 1. 



Measurements: The measurements of an adult male from Yei 

 are as follows: Length of head and body 120; length of tail 140; 

 length of hind foot 33; length of ear 19; condyloincisive length of skull 

 30.3; gi-eatest length of skull 35.6; length of nasals 14.2; least inter- 

 orbital width 6.3; length of anterior palatine foramina 6.2; crown 

 length of upper toothrow 5.0; length of auditory bullae 9.0; depth 

 of skull at level of auditory bullae 13.8; gi-eatest width across zygo- 

 matic arches 17.2; greatest width of skull 16.3. 



Remarks: T. congicus differs from T. emini and its subspecies in 

 that the pterj^goid fossae are deeper and not so widely flaring, anterior 

 palatine foramina are relatively shorter, the auditor}^ bullae are more 

 inflated anteriorly and antero-laterally, and the anterior portion of 

 the skull is flatter and less decurved. So far as color is concerned 

 there is no discernible difference between the two species. However, 

 when specimens from the same locality are compared they are readily 

 separable by means of the skull. 



Taterillus emini anthonyi Hatt 



Figure 5,c 



Taterillus emini anthonyi Hatt, Amer. Mus. Nov., No. 708, p. 2, Apr. 4, 1934. 

 (White Nile, west bank, 20 miles south of Jebel Ain.) 



Specimen Examined: The type. 



Measurements: The type, an adult female, measures as follows: 

 Total length 316; length of tail 182; length of hind foot 35; condyloin- 

 cisive length of skull 33.1; length of nasals 14.7; least interorbital 

 breadth 7.3; length of anterior palatine foramina 7.1; crown length 

 of upper toothrow 4.9; length of auditory buUae 10.0; depth of skull 

 at level of auditory bullae 14.4; greatest width across zygomatic 

 arches 15.8. 



Remarks: The type and one paratype are the only known examples 

 of this subspecies. Hatt, in comparing these two specimens with 

 types in the British Museum, remarked that these were strikingly 

 different but specimens in the British Museum from intermediate 

 localities suggested complete intcrgradation. It is quite apparent 

 to me also that intcrgradation does occur with the form immediately 

 to the west, w})icli is rufus. For additional remarks see under T. e. 

 rufus. 



