MAMMALIA. . 13 



This Sand-Rat is found throughout the whole of the sandy regions of 

 Barbary and North Africa. 



^o. Psavimomys myosurus. Wagn. Wiegm. Archlv. 1848, 183. 



This species, described first from Syria by Wagner, appears to take 

 the place of the above in the higher ground. It has not been noticed 

 beyond Syria. 



51. Psammomys tamaricinus. Kuhl. Beitr. 6g. 



A small rodent met with beyond the south end of the Dead Sea 

 appears to belong to this species, which is known from South-eastern 

 Russia. 



SUB-FAMILY, ARVICOLINI. 



52. Arvicola nivaiis. Bias. Wirbelth. Deutschl., p. 359. Alpine Vole. 



Plate IV. 3. 

 One of the most interesting discoveries we made was that of the 

 Alpine Vole, which I took close to the snow-line on Mount Hermon in 

 June. The specimen, identical with those from the Alps and Pyrenees, 

 is now in the British Museum. The species was hitherto known only 

 from the Alps, and rarely from the Pyrenees. 



53. Arvicola arvalis. Gm. Syst. Nat. i., p. 134. Field Vole. 

 Very common everywhere on cultivated land. 



54. Arvicola socialis. Desm. Mamm. Sp. 447. 



Found in the desert of Sahara near Damascus, and probably also in 

 Southern Judcea, where I have seen more than once a very light-coloured, 

 short-tailed Field Vole. 



55. Arvicola amphibiiis. Desm. Mammal., p. 180. Water Vole. 

 Only observed by us in the north. Found throughout Europe, Central 



and Western Asia. 



56. Arvicola gtientheri. Alston. P. Z. S., 18S0, p. 62. 



Plate IV. 2. 

 This species, discovered recently by Mr. Danford at Marash in 



