Excerpt from The Geological Magazine, or Monthly Journal of Geology, Vol. 8: With Which Is Incorporated "the Geologist"; January December, 1881 The researches of Mr. Glass, referred to in this paper, but more fully to be detailed in the forthcoming Silurian Supplement, have been long and arduous, and the important and interesting results attained are only commensurate with the skill and perseverance which he has so abundantly shown. I feel greatly indebted to him for his prolonged and valuable assistance. The first difficulty besetting Mr. Glass in his operations was the finding of suitable specimens - hundreds of examples of a particular species being sometimes needed to produce the desired result. This difficulty has been overcome through the willing services of George Maw, Esq., of Benthall Hall, Shropshire, and my cordial thanks are due to him for the most generous manner in which he has had SO many tons Weight of the Wenlock Shale washed, and the old quarries of Benthall Edge carefully hand-picked, for specimens. Indeed, without the thousands of specimens thus procured, many of Mr. Glass's discoveries might never have seen the light. Other valuable results of the intelligent and indefatigable help which has been rendered to me by Mr. Maw will be shown in the stratigraphical sections and lists at the close of this paper. It should be added also that in sorting the specimens needed for the preparation of the stratigraphical lists and in many important suggestions, I have been greatly aided by the Rev. H. G. Da y, of Brighton, and I desire gratefully to acknowledge his devoted assist ance, rendered all the more trying and difficult from the minuteness Of many of the Shells. 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.