CHAP. XVII.] 
MAMMALIA. 
231 
an extinct genus, Eumys, in the Upper Miocene of Dakota, and 
another, Mysops, in the Eocene of Wyoming. 
In South America Mus, or more probably Rcsperomys , is 
abundant in Brazilian caverns, and Oxymyderus in the Pliocene 
of La Plata ; while Arvicola is said to have occurred both in the 
Pliocene and Eocene deposits of the same country. 
Family 56. — SPALACHLE. (7 Genera, 17 Species.) 
General Distribution. 
N r.OTROPtCAL 
Sub-regions. 
NE ARCTIC 
Sub-regions. 
PaLjEARCTIC 
Sub-regions. 
Ethiopian 
Sub-regions. 
Oriental 
Sub-regions. 
Australian 
Sub-regions. 
— 
j 
1 . 2 . 3 -- 
1.2.3 - 
1—3.4 
! 
The Spalacidie, or mole-rats, have a straggling distribution over 
the Old World continents. They are found over nearly the whole 
of Africa, but only in the South-east of Europe, and West of 
Temperate Asia, but appearing again in North India, Malacca, 
and South China. Ellobius (I sp.), is found in South Russia 
and South-west Siberia ; Spalax (1 sp.), Southern Russia, West 
Asia, Hungary, Moldavia, and Greece (Plate II., vol. i. p. 218) ; 
Bhizomys (6 sp.), Abyssinia, North India, Malacca, South China ; 
Heterocephalus (1 sp.), Abyssinia ; Bathyerges (= Orycterus 1 sp.), 
South Africa ■ Oeorychus (6 sp.). South, Central, and East Africa ; 
Jleliophobvs (1 sp.), Mozambique. 
Family 57. — DIPODIDiE. (3 Genera, 22 Species.) 
General Distribution. 
Neotropical 
Nearctic 
Pal^arctic I 
Ethiopian 
Oriental 
Australian 
Sub- regions. 
Sub-regions. 
Sub- regions. 
Sub-regions. 
Sub-regions. 
Sub-regions. 
l.a. 3 . 4 -2.3.4 1.2.3 
The Jerboas, or jumping mice, are especially characteristic of 
the regions about the eastern extremity of the Mediterranean, 
being found in South Russia, the Caspian district, Arabia, Egypt, 
