262 Mr. 0. Thomas on 



The species described in the footnote * was also considered 

 by Biicliner as M. meridianus. 



13. Mus rati us, L. 

 6 . 20. Hills south of Samarkand. 4000'. 



14. Mus wagneri, Eversm. 



6. 15, 36, 83, 96; ? . 6, 8, 10, 13, 14, 17, 18. Saniar- 

 kand and southwards. 2000-3000'. 



S. 47, 89, 90, 91 ; ? . 31, 32, 33, 42-58. 30-50 miles 

 S.W. of Bokhara. 600'. 



15. Ajyodemus sylvaticus arianus, Blanf. 



J. 9; ? . 16. Hills south of Samarkand. 3000'. 

 d. 101. Samarkand. 2000'. 



d. 103,101,111-115. Hissar Mts., 100 miles E. of 

 Samarkand. 



16. Cricetulus pJueus, Pall. 



d . 112. Hissar Mts., 100 miles E. of Samarkand. 

 9500'. 



* Meriones biichneri, sp. n. 



Allied to M. meridianus, but with much shorter ears. General colour 

 " clay -colour," hut briglit and plossv, instead of dull as in Kidgway, 

 darker and richer than the sandy colour of M. meridianus. Under surface 

 pure white to the roots of the hairs. Ears very short, 11 mm. instead of 

 15 measured from their bases and 6-7 mm. instead of 9 measured dry 

 from the crown, their proectote bright bufly with white end. Hauds and 

 feet white ; soles of the latter wholly hairy except a small spot under 

 the calcaneum ; claws white. Tail uniformly tawny ochraceous above 

 and below, a few of the terminal hairs tipped with black. 



Skull apparently quite as iu M. meridianus, except that the bullae are 

 rather smaller. 



Dimensions of the type : — 



Head and body (in skin) 118 mm. ; tail (skin) 89 ; hind foot (wet) 27 ; 

 ear (wet) 11. 



SliuU : greatest length 32-2 ; breadth on auditory bullae 18. 



Hab. Deleun Mts., Dsungaria. 



Type. Adult male. B.M. no. 92. 1. 1. 11. Collected by X. Przevalski, 

 October 1874, and received iu exchange from the St. Petersburg Museum. 



This gerbil was referred to M. tneridiantis by Biichner, but he cannot 

 have noticed the striking difference in the size of the ears. From " Ger- 

 billus " kozlovi, Satunin, it differs by its white claws and untufted tail. 



