A LIST OF THE GENERA AND FAMILIES 
Matyoscor from M yocastor. 
Nephacodus from Phenacodus. 
Nopachtus from Panochtus. 
Plohophorus from Hoplophorus. 
Rodiotherium from Diorotherium. 
Sadypus from Dasypus. 
Senodon from Nesodon. 
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OF MAMMALS. 47 
Senonycteris from Nesonycteris. 
Teonoma from Neotoma. 
Tonostylops from Notostylops. 
Traspoatherium from Astrapotherium. 
Utaetus from Eutatus. 
Xotodon from Toxodon. 
Xotoprodon from Protoxodon. 
KINDS OF NAMES. 
MYTHOLOGICAL NAMES. 
A considerable number of generic names are taken from mythology, 
both classical and Hindu, such as: 
Acdestis. Daunus. Inuus. Pontoporia. 
JEgipan. Diana. Lamictis. Prometheomys. 
Aeilo. Electra. Lar. Satyrus. 
Alastor. Eteocles. Megvera. Silenus. 
Alectops. Euphrosyne. Menilaus. Sivameryx. 
Ammon. Faunus. Meriones. Sivatherium. 
Bramatherium. Furia. Midas. Sphinx. 
Calliope. Gorgon. Nestoritherium. Sylvanus. 
Calydonius. Hamadryas. Ocy petes. Tideus. 
Celezeno. Harpyia. C(Edipus. Titanotherium. 
Clorinda. Ia. Pan. Vishnutherium. 
Clymene. Idomeneus. Paniscus. 
These are open to the objection that they are likely to have been used 
in other groups,“ thus necessitating change and consequent multiplica- 
tion of synonyms. 
GEOGRAPHICAL NAMES. 
Geographical names have been used mainly in paleontology. In 
spite of the fact that they are mainly hybrid words, they have the 
advantage of convenience, as they are usually based on the type local- 
ity of one of the species. Such are: 
Aethiops. Cayluxotherium. Libytherium. Puelia. 
Andinomys. Cesserassictis. Limognitherium. Quercytherium. 
Annamisus. Colhuapia. Missourium. Ronzotherium. 
Argyrocetus. ^ Colhuelia. Meeritherium. Ruscinomys. 
Argyrodelphis. Cournomys. Mouillacitherium. | Samotherium. 
Argyrohippus. Feloyia. Otronia. Scaldicetus. 
Argyrohyrax. Felsinotherium. Pampatherium. Sinisus. 
Argyrolestes. Gergoviomys. Paranomys. Sivalarctos. 
Atlantoxerus. Helladotherium. Pellegrina. Sivalhippus. 
Bachitherium. Hydaspidotherium. Perieromys. Uintacyon. 
Boneia. Issidioromys. Plataéomys. Uintamastix. 
Budomys. Kasi. Platatherium. Uintatherium. 
Burramys. Lafkenia. Poiana. Urmiatherium. 
Cadurcotherium. Lelfunia. Prominatherium. Wynyardia. 

* Unless compounded with a name of a mammal, as for example Prometheomys. 
» Argyrocetus, meaning La Plata whale, apy vpos, silver, being used as the equivalent 
of the Spanish La Plata, silver. 
