VI 



CONTENTS 



and 



Subfamily Cricetinae — Cont. 



Genus Peromyscus Gloger — Cont 

 Subgenus Peromyscus Gloger 

 Subgenus Megadontomys Mer 



riarn 



Subgenus Ochrotomys Osgood 

 Subgenus Podomys Osgood . 



Genus Baiomys True 



Genus Onychomys Baird . . . 

 Genus Zygodontomys J . A. Allen 

 Genus Scotinomys Tbomas . . 

 Genus Sigmodon Say and Ord . 

 Genus Neotomodon Merriam . 

 Genus Neotoma Say and Ord 

 Subgenus Neotoma Say 



Ord 



Subgenus Homodontomys Gold 



man 



Subgenus Teonoma Gray . . 

 Subgenus Hodomys Merriam 

 Genus Teanopus Merriam . . . 

 Genus Nelsonia Merriam . . . 

 Genus Rheomys Thomas . . . 

 Genus Xenomys Merriam . . . 



Subfamily Microtinae 



Genus Dicrostonyx Gloger . . 

 Subgenus Dicrostonyx Gloger 

 Subgenus Misothermus Hensel 

 Genus Synaptomys Baird . . 

 Subgenus Synaptomys Baird 

 Subgenus Mictomys True . 

 Genus Lemmus Link .... 

 Genus Cletbrionomys Tilesius 

 Genus Phenacomys Merriam . 

 Genus Orthriomys Merriam . 

 Genus Herpetomys Merriam . 

 Genus Microtus Schrank . . . 

 Subgenus Chilolus Baird . . 

 Subgenus Aulacomys Rhoads 

 Subgenus Microtus Schrank 

 Subgenus Stenocranius Kast 



chenko 



Genus Pedomys Baird . . 

 Genus Pitymys McMurtrie 

 Genus Lagurus Gloger . . 



Subgenus Lemmiscus Thomas 

 Genus Neofiber True . 

 Genus Ondatra Link . . 

 Family Muridae .... 

 Subfamily Murinae . . . 

 Genus Rattus G. Fischer 

 Genus Mus Linnaeus . 

 Superfamily Dipodoidea . 

 Family Zapodidae .... 

 Subfamily Zapodinae . . 

 Genus Zapus Coues . . 

 Genus Napaeozapus Preble 

 Suborder Hystricomorpha . 

 Superfamily Erethizontoidea . 



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Family Erethizontidae. . . . 



Subfamily Erethizontinae . . 

 Genus Erethizon F. Cuvier . 

 Genus Coendou Lacepede . 



Superfamily Cavioidea. . . . 



Family Hydrochoeridae . . . 



Subfamily Hydrochoerinae . . 

 Genus Hydrochoerus Brisson 



Family Heptaxodontidae . . . 



Subfamily Heptaxodontinae . 

 Genus Heptaxodon Anthony 

 Genus Elasmodontomys Anthony 

 Genus Quemisia Miller . . 



Family Dasyproctidae . . , 



Subfamily Cunicidinae . . , 

 Genus Cuniculus Brisson 



Subfamily Dasyproctinae , 

 Genus Dasyprocta Illiger 



Superfamily Oclodontoidea 



Family Capromyidae . . 



Subfamily Capromyinae. . 

 Genus Capromys Desmarest 

 Subgenus Capromys Desma 



rest 



Subgenus Mysateles Lesson 

 Genus Geocapromys Chapman 

 Genus Hexolobodon Miller . 



Subfamily Plagiodontinae . . 

 Genus Plagiodontia F. Cuvier 

 Genus Isolobodon J. A. Allen 

 Genus Aphaetreus Miller 



Subfamily Myocastorinae 

 Genus Myocaslor Kerr 



Family Echimyidae . . . 



Subfamily Echimyinae . . 

 Genus Hoplomys J. A. Allen 

 Genus Proechimys J. A. Allen 

 Genus Echimys F. Cuvier . 

 Genus Diplomys Thomas . 

 Genus Heteropsomys Anthony 

 Genus Homopsomys Anthony 

 Genus Brotomys Miller . . 

 Genus Boromys Miller . . 



Order Cetacea 



Suborder Odontoceti .... 



Superfamily Physeteroidea 



Family Ziphiidae 



Genus Berardius Duvernoy 

 Genus Mesoplodon Gervais 

 Genus Ziphius G. Cuvier . 

 Genus Hyperoodon Lacepede 



Family Physeteridae . . . 

 Genus Physeler Linnaeus 



Family Kogiidae 



Genus Kogia Gray . . . 



Superfamily Delphinoidea . 



Family Monodontidae . . 



Subfamily Delphinapterinae 



Genus Delphinapterus Lacepede 



