252 THE ETHIOPIAN REGION. [CHAP. 



IV. Rodentia (cont.\ 



Pachyuromys. 

 Mystromys. S. African. 

 Otomys. S. E. and W. African. 

 Dasymys. S. African. 

 Malacomys. W. African. 

 Dendromys. \ 



Limacomys. These represent a peculiar Ethiopian 

 Steatomys. sub-family the Dendromyina. 



Lophuromys. j 



Trilophomys. N. E. African, and (?) S. Arabian. 

 Deomys. W. African. Alone represents a sub-family. 

 Cricetomys. 



Saccostomns. W. African 1 . 

 SPALACID.E. 



Bathyergus. \ Constitute a sub-family the Ba- 

 Georychus. thyergina ; the last of the four 



Myoscalops. being confined to Somaliland, 



Heterocephalus. ) while the first is S. African. 



Pedetes. The sole representative of a sub-family. 

 OCTODONTID^:. Elsewhere at the present time only in 



the Neogaeic realm and N. Africa. 

 Pectinator. N. E. African. 

 Petromys. S. African. 

 Triaulacodus. W., S. and E. African. 



V. Ungulata. 



n Eur P ean and Asiatic 



ARTIODACTYLA 



AK1. UACiYLA. Plistocene and Pliocene, and 



HIPPOPOTAMI DAI. 4 . ,, , -r. , 



also in Madagascar. Formerly 



Hippopotamus. in lower Egypt. 



Sus ; the Potamochczrine group, frequently regarded as 

 a distinct genus, is peculiar to the Ethiopian and 

 Malagasy regions. 



Phacochcerus. 

 1 If Arvicanthis be accepted as a genus it should come here. 



