232 GEOGRAPHICAL ZOOLOGY. [PART iv. 



and Abyssinia ; but they also extend over a large part of Africa, 

 and eastward to India ; while isolated forms occur in North 

 America, and the Cape of Good Hope. Dipus = Gerbillus (20 

 sp.), inhabits North and Central Africa, South-East Europe, and 

 across Temperate Asia to North China, also Afghanistan, India, 

 and Ceylon 1 ; Pedetes (1 sp.), South Africa to Mozambique and 

 Angola ; Jaculus = Meriones (1 sp.), North America, from Nova 

 Scotia and Canada, south to Pennsylvania and west to California 

 and British Columbia (Plate XX., vol. ii. p. 135). 



Extinct Dipodidte. Dipus occurs fossil in the Miocene of the 

 Alps; and an extinct genus, Issiodromys, said to be 'allied to 

 Pedetes of the Cape of Good Hope, is from the Pliocene forma- 

 tions of Auvergne in France. 



FAMILY 58. MYOXIDJE. (1 Genus, 12 Species.) 

 GENERAL DISTRIBUTION. 



The Dormice (Myoxus), are small rodents found over all the 

 temperate parts of the Palaearctic region, from Britain to Japan ; 

 and also over most parts of Africa to the Cape, but wanting in 

 India. Some of the African species have been separated under 

 the name of Graphidurus, while those of Europe and Asia form 

 the sub-genera Glis, Muscardinus, and Eliomys. 



Extinct Myoxidce. Myoxus ranges from the Post-pliocene of 

 the Maltese caverns to the Miocene of Switzerland and the 

 Upper Eocene of France ; and an extinct genus Bracliymys is 

 found in the Miocene of Central Europe. 



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