Excerpt from A Student's d104-Book of Zoology, Vol. 1 IN preparing the present work I have been actuated mainly by the desire to place before English students of Zoology a treatise in which the subject was dealt with on the lines followed with so much advantage by Claus and his predecessors in their works on Zoology. My original intention was to bring out a new edition of Claus' Lehrbuch, revised and brought up, to date, and a trace of this intention may be seen in a few pages of the present volume. But this plan was, for various reasons, soon given up, and the present treatise is, with the exception of about twenty pages, an. Entirely new work. 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.