VI. Climate and Its Influence Upon the Oligocene Faunas of the Pacific Coast

With Descriptions of Some New Species from the Molopohporus Lincolnensis Zone. VII. Climatic Zones of Martinez Eocene Time. VIII. Ancient Panama Canals

by Albert B. Reagan, California Academy of Sciences, Clarence Almon Waring, Edward Payson Van Duzee, George Clark Gester, John Van Denburgh, Roy Ernest Dickerson, Samuel Stillman Berry, Carl Ewald Grunksy