72—6 
INDIAN TERTIARY AND POST-TERTIARY YERTEBRATA. 
10. Equtjs namadicus (Falc. and Caut.). India ; pleistocene and (?) pliocene, 
(Narbada and (?) Sub-Himalaya). 
? Equus palceonus (F. and C.) 
11. Equtjs neog^ius (Lund). S. America; pleistocene. 
Hippjidion neogaum (Owen). | Hippoideum neogceum (Lund). 
12. ^Equus occidentalis (Leidy). N. America; pliocene. 
Equus excelsus (Lund.). 
13. Equus onager (Pallas). Kach, Persia, and Mesopotamia; recent. 
Asinus hemionus (Gray). 
,, hiang (Layard) . 
„ onager (Gray). 
Equus asinus onager (Schred). 
„ hemionus (Sykes) . 
„ lchur (Lesson). 
14. Equus pacieicus (Leidy). N. America ; pleistocene. 
15. *Equus prezewalkseii (Poliakoff). C. Asia; recent. 
16. Equus principalis (Lund). S. America; pleistocene. 
Hippidion principalis (Owen) . 
17. Equus quagga (Gmel.). S. Africa ; recent. 
Asinus quagga (Gray). 
18. Equus quaggoides (E. Maj.) Europe; pliocene. 
19. Equus sivalensis (Ealc. and Caut.). India; pliocene. 
20. Equus stenonis (Coccbi). Europe; up. pliocene. 
21. Equus tau (Owen). S. America; pleistocene. 
22. Equus zebra (Linne). S. Africa; recent. 
Asinus zebra (Gray). Hippotigris antiquorum (II. Smith). 
Equus brasiliensis (Jacob), Zebra indica (Aldrov.). 
„ indicus ( J onston) . 
This list gives a total of 10 species of Rippotherium, all of wliich are fossil, 
and whose distribution may be tabulated as follows, viz . : — 
India and China 2 
Europe and Africa 1 
America 7 
Of the genus Equus 1 there are 22 species, of which 8 are living, 2 are found 
both living and fossil, and 14 are exclusively fossil : their distribution may be 
tabulated as follows : — 
Living. Fossil. . 
Africa 5 0 
Asia 5 2 
Europe 2 3 
North America 0 4 
South America 0 7 
Dentition of the Equidce . — As the materials for the history of the fossil Siwalik 
Equus parvulus (Marsh) = Protohippus. 
