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CHAP. XVII.j 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 Hesperomys, is
abundant in Brazilian caverns, and OxymyderiLs 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.—SPALACID^. (7 Genera, 17 Species.)
Neotropical
Si:b-begions.
General Distribution.
Nearctic PaL/EARctic Ethiopian
I
ScB-REGioNS.
I
Sub-regions. Sub-regions.
1.2.3- 1,2.3— 1—3.4
Oriental I Australian
Sub-regions. Sub-regions.
The Spalacidse, or mole-rats, have a straggling distribution ovei
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. Ellohius (1 sp.), is found in South Eussia
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
Hderocephalus (1 sp.), Abyssinia ;
South Africa ;
Bathyerges (= Orycterus 1 sp.).
Georychus (6 sp.), South, Central, and East Africa
Eeliophobus (1 sp.), Mozambique.
Neotropical
sub-rbgionr.
Family 57.—DIPODID^. (3 Genera, 22 Species.)
Neabctic
Sub-regions.
General Distribution.
Pal^arctic
sub-hegions.
Ethiopian
Sub-regions.
1.2.3.4— 2.3.4 lo2.3
Oriental
Sub-regions.
;
;
Australian
Sub-eegions.
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,
YoL. IL—16