Excerpt from Memoirs of the Carnegie Museum, 1919-1920, Vol. 7 Owing to circumstances beyond the control of the Director and Editor of the publications of the Carnegie Museum a partial suspension of the publishing activi ties of the Museum took place during the period in which the United States of North America were at war with the so-called Central Powers of Europe. This cessation of our issue of scientific literature was only temporary. At the time these lines are being written a resumption of our activities along the lines alluded to has taken place. The issue of Memoir No. 6 from the pen of Mr. O. A. Peterson upon The American Diceratheres concludes the Seventh Volume of the Memoirs. The Eighth Volume of the Memoirs is well under way, Memoir No. 1 having already appeared and No. 2 being in the hands of the printers. The publication of the. 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.