CLASSIFIED KEY TO THE INDEX. 19 
Page 
Pleistocene 128 
Canada 128 
Atlantic Coastal Plain 128 
Great Lakes region 128 
Mississippi Valley 128 
Sierra Nevada and Pacific Coast region 128 
Rhode Island 128 
Silurian 128 
Canada 128 
Appalachian region 128 
Mississippi Valley 128 
Rocky Mountain region 128 
Great Basin region 128 
Miscellaneous 128 
South Carolina 128 
South Dakota 128 
Tennessee 128 
Tertiary 129 
Atlantic Coastal Plain 129 
Gulf of Mexico region 129 
Cuba 129 
Great Plains region 129 
Rocky Mountain region 129 
Great Basin region 129 
Sierra Nevada and Pacific Coast region 129 
Texas 129 
Utah 129 
Vermont 129 
Virginia 129 
Washington 129 
West Indies 129 
West Virginia 129 
Wisconsin 129 
Wyoming 130 
