Excerpt from Paleontology, Vol. 5: Part I. Lamellibranchiata; Text and Plates, Containing Descriptions and Figures of the Monomyaria of the Upper Helderberg, Hamilton and Chemung Groups The present volume includes the letter press and plates which constitute a port-ion of Volume V, Part 1, of the paleontology OF new york. It was originally intended to arrange the whole of this material as a volume of text and a volume of plates but the exigencies of publication have made it necessary to issue a volume of the work at the present time, and in its present form, leav ing the remaining portion to constitute a similar volume which will be published early in the next vear. 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.