IX.] 



EASTERN DIVISION. 



323 



tail, includes several species, extending from Siberia to Nubia, 

 so that the genus just enters the Ethiopian region. It is repre- 

 sented in the Plistocene of northern Asia. Lastly, there is the 

 genus Alactaga, of which there are several species, mostly inhabit- 

 ants of Northern and Central Asia. The typical A. jaculus 

 extends, however, into Persia and southern Russia, while in the 

 Plistocene it ranged as far west as Germany ; and another species 

 is an inhabitant of Afghanistan. Although mainly an Ethiopian 



FIG. 67. HEAD OF SPANISH IBEX (Capra pyrenaica). 



and Neotropical family, the Octodontidce. have an Holarctic repre- 

 sentative in the gundi (Ctenodactylus\ which inhabits the borders 

 of the Sahara in the neighbourhood of Tripoli. The extinct 

 Pellegrinia, of the Sardinian Pliocene, also belongs to the same 

 family. 



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