Excerpt from Index of Generic Names of Fossil Plants, 1820-1950 This work comprises an index of generic names of fossil plants, exclusive of the diatoms, that have been published from 1820 through 1950. It is based on the U. S. Geological Survey's working Compendium Index of Paleobotany and its ac companying bibliography. Although several hundred genera have been added by the author, it is realized that the list' is not complete, particularly for the past two decades. An attempt has been made to cite for each genus a type species, or one that is representative. In addition a brief notation is given concerning the age, geo graphic origin, and taxonomic status of most of the fossils. For some plants this information is further supplemented with such notations as seemed desirable to aid most effectively those persons who may have occasion to seek the type of in formation that is presented. It may be emphasized that this is not a critical study but is intended rather as an informational source concerning the origin of the respective generic concepts. The introduction includes a sketch of the historical origin of the Compendium and states in some detail the types of problems encountered in presenting the work in this form. The bibliography presents primarily the full citations of those references indicated in the index. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the natural dangers we are facing. The agency has over 10,000 employees that collect, monitor, and analyze data so that they have a better understanding of our problems. The USGS is dedicated to provide reliable, investigated information to enhance and protect our quality of life. This is one of their bulletins.