Excerpt from Bulletin of the United States Geological Survey, 1898, Vol. 153 In some groups many names have been recently added to our litera ture, and these have been included in the list, as published by their respective authors, though some of them will doubtless prove to be synonyms. Many species published by the earlier authors have never been properly illustrated, and as the descriptions of these Species are often inadequate, it is next to impossible to identify many of them with certainty. These names have all been included in the list at their proper places, though many of them, doubtless, will finally be eliminated. The first part of the bulletin is devoted to a list of the titles of papers from which references have been obtained. These are first arranged chronologically, followed by an alphabetical list of the authors, the years in which his publications have appeared being placed after each author's name. Following these lists is a tabulation of the genera of each class, with the number of species in each genus. The second part of the bulletin is the bibliographic list proper, in which all North American Carboniferous genera of invertebrates have been arranged alphabetically, with the species arranged alphabetically under each genus. In the printing of this list a distinction is made in the type used for the species which have been illustrated and those which have not. All references which have not been actually examined are designated by an asterisk. 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.