Excerpt from A Monograph of the Order of Oligochaeta M. Vaillant's work is rather more comprehensive in scope, but there is no account of any researches made after the year 1886; so that the large amount of literature which has appeared since that date has not yet been incorporated into any general work. M. Vaillant's contribution also is rather more devoted to the systematic side of the subject than to the description of structure. 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.