Oliver Perry Hay

The Pleistocene Of North America And Its Vertebrated Animals Form The States East Of The Mississippi River And Form The Canadian Provinces East Of Lon

Notes On Some Fossil Horses, With Descriptions Of Four New Species

Notes On Some Fossil Horses, With Descriptions Of Four New Species

The Pleistocene Of North America And Its Vertebrated Animals Form The States East Of The Mississippi River And Form The Canadian Provinces East Of Longitude 95

The Batrachians And Reptiles Of The State Of Indiana

The Pleistocene Of North America And Its Vertebrated Animals Form The States East Of The Mississippi River And Form The Canadian Provinces East Of Lon

The Fossil Turtles Of North America

The Recognition Of Pleistocene Faunas

Descriptions Of Species Of Pleistocene Vertebrata, Types Or Specimens Of Most Of Which Are Preserved In The United States National Museum