Excerpt from The Naiades of Missouri After some years of intensive studies in the field, library and laboratory an attempt is made to give a catalogued account of the Naiades, or Fresh water Mussels, of Missouri. Most of the data for this descriptive and illustrated catalogue have been collected through extensive, personal surveys of the most important streams and lakes of the State and w the typical anatomical and shell material from the different localities are preserved in the writer's laboratory. No literature of any consequence. dealing with the Naiades of Missouri, had been produced until the author of this paper made a preliminary report on The Mussel Resources of Missouri. This was, however, a government report, published for ecomic purposes, the detailed account of the scientific observations of which will t appear until a later date. The plan of classification, based on anatomical structures, tably those of marsupial characters, has been carefully followed in this work. The many changes in the menclature of this catalogue from that of the Simpsonian system are due especially to the recognition of Lindahl's orthographic modification and of the wise scheme of taxomy for the Naiades begun by Sterki (1906) and well consummated by Ortmann (1912); and also to the acceptance of Rafinesque's priority as recently revived by Mr. Frierson and accepted by Dr. Ortmann. 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 techlogy 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.