146 
Akodon. 
Pitcheir. 
* Lamprodon ? 
XIII. Dip oi den. 
Psammomys. 
Dendromys. 
Euryotis- Otomys-Mystromys - 
Malacothrix . 
Gerbillus-Pihombomys. 
Dipus-Alactaga-Scirtetes . 
Meriones - Macrocolus-Dipodo- 
mys. 
Pedetes-Helamys. 
Petromys. 
XIV. Spalaciden. 
Nyctoleptes-Rhizomys-Hetero- 
ceplialus. 
Spalax- Chtonergus. 
Siphnaeus. 
Bathyergus - Heliophobius - 
Orycterus. 
Cten )mys. 
Ctenodactylus. 
*Steneofiber. 
Ascomys-Diplostoma-Geomys 
- Thomomys-Saccophorus. 
Neotoma. 
Sigmodon. 
Mesomys. 
Isothrix. 
Habrocoma. 
Octodon-Dendrobius. 
Galea 
Schizodon. 
Psammoryctes. 
Oplodon 
XV. L o ncher inen. 
Isodon-Capromys- Plagiodon- 
tia. 
L<. Pachydermen. Hufthiere. 
XXXV. Hippionen. 
* Hipparion. 
*Hippotherium. 
Egnus. 
XXXVI. Tapir oiden. 
Equus - * Palaeotherium-* Hippa 
ritherium. 
P alaeotli.- *Lophiodon- *Listrio- 
dön. 
Tapir us. 
Gazella - * Anoplotherium - *Cy- 
clognathus - * Xiphodon-* Oplo- 
theriuni - * Microtherium- *Ple- 
regnathus. 
Rhinoceros - * Chalicotherium - 
*Cainotherium. 
*Coryphodon. 
Sus-*Anthracotherium. 
Moschus-* Dichobune*Dichodon. 
* P aloplotherium. 
XXXVII. Su inen. 
Phacochoerus-*Calydonius. 
Babirussa-*Choerotherium. 
Babirussa-*Hyotherium. 
Anthrac. - *Hyopotamus. *Mery- 
copotamus. 
Anoploth.-*Choeropotamus. 
Tapirus-*Harlanus. 
*Porcus. 
Sus-*Tapiroporcus. 
Phacochoerus. 
Dicotyles. 
Hyrax-* Microchoerus . 
Hyrax-*Adapis. 
XXXVIII. Hippop ot amen. 
Hippopotamus - * Potamippus - 
*Sideroth. - *Tetraprotodon- 
*Hexaprotodon. 
*Elasmotherium. 
