Proceedings of the American Philosophical Society, 1884, Vol. 22

Download or read book Proceedings of the American Philosophical Society, 1884, Vol. 22 written by American Philosophical Society and published by Forgotten Books. This book was released on 2018-02-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Proceedings of the American Philosophical Society, 1884, Vol. 22: Held at Philadelphia, for Promoting Useful Knowledge The following study is based primarily on an examination of the speci mens contained in the Museum N acional of Mexico, which I was permit ted to make through the kindness of the Director of the Departments of Geology and Mineralogy, Professor Mariano Barcena. Through the me diation of the same gentleman, I obtained permission from Professor Antonio Castillo, Director of the School of Mines, to examine the corres ponding material preserved in the fine museum of that institution. The knowledge derived from the study of the latter, reinforced the results I obtained from the study of the specimens of the Museum Nacional, so as to enable me to reach definite conclusions as to the definitions of various species which are represented in both collections. I wish to record the obligations under which I have been laid by both of these distinguished gentlemen. I have, through their aid, been enabled to make a comparison between the pliocene fauna of Mexico, and that of Buenos Ayres, and that of Oregon. The species of the Pampean fauna contained in my private collection, are those exhibited by Messrs. Ameghino, Larroque and Brachet, at the Exposition of Paris of 1878. My Oregon material is derived from the explorations of my parties under Messrs. Sternberg and Duncan, and those of Professor Thomas Condon of the University of Oregon, who kindly lent me his collection. 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.