526 MR. OLDFIELD THOMAS ON [DeC. 12, 



Mouse pi^eserved in the mountains of Persia, closely allied to the 

 N. American Peromyscus, and widely different from any of the 

 Asiatic Muridfe hitherto known. 



I have named this striking novelty in honour of Col. Bailward, 

 to whose generosity the Museum is indebted for the interesting 

 collection of which it forms a part. 



22. Cricetulus ph^us Pal]. 



cS . 46. Sakiz, N.W. of Karmanshah. 5000'. 

 2 . 54. Tortoum R., 60 mi. N. of Erzeroum. 4000'. 

 c? . 58. Baibort, Choruk River, between Erzeroiam and Tre- 

 bizond. 5500'. 



" Trapped among the corn-lands." — B. B. IF. 



23. MiCROTUS NIVALIS Mart. 



S . 62. 25 miles N. of Baibort. 7000'. 



24-27. MiCROTUs spp. 



S . 40. Derbend, 60 mi. W. of Isfahan. 6500'. 

 2 . 44. Diwan-Dere, 150 mi. N.W. of Kermanshah. 6500'. 

 $ . 57. Arab-Keni, 60 mi. N. of Erzeroum. 9000'. 

 $. 59. Baibort. 5000'. 

 2 . 63. 70 mi. N. of Baibort. 7000'. 

 These five Voles belong to at least four species. 



28. Ellobius lutescens Thos. 

 c?. 51. LakeYan. 5000'. 



Topotype. Quite similar to the original specimens. 



29. Ellobius woosnami Thos. 



Abstr. P. Z. S. No. 24, p. 23, Dec. 19, 1905. 



c? . 38. 2 . 39. Dumbeneh, 50 miles N. of Isfahan. 7000'. 



Colour much as in E. lutescens. Teeth of much simpler pattern. 



Fur soft and loose in texture ; hairs of back about 9 mm. in 

 length. General colour above dull greyish buffy, the hairs slaty 

 gi-ey, with dull buffy tips. Sides palei' greyish, not more strongly 

 buffy as is the case in E. tcdpinus. Head blackish above, con- 

 trasting markedly with the general colour, much more so than in 

 E. lutescens. Under surface similar to sides, the tips of the hairs 

 very pale buffy. 



Skull rather more heavily built than in E. lutescens. Zygomata 

 not so expanded vertically in the centre as in lutescens and /msco- 

 capillus, its greatest vertical breadth 3 mm. or less. 



Teeth of a more simple type than those of E. lutescens and 

 ftiscocapillus, and nearly corresponding with those of fig. 6 of 

 Biichner's plate * of Ellobius teeth. The last upper molar with 



* Mamni. Przewalsk. pi. xv. (1889). 



