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Excerpt from Manual of Conchology, Vol. 14: Structural and Systematic, With Illustrations of the Species The author begs those who may use this work to begin by taking apart one specimen of each species to be studied then find the genus by the Key on page xxviii. After a certain amount of practice the genus may be' ascertained by removing valves vii and viii only but guessing it from the external features is in most cases uncertain and unscientific. As a rule, Chitons tell no secrets to those who will not take the trouble to disarticulate them. It is hoped that describers of new species will hereafter state the generic characters of their novelties. It is as rational to describe a bivalve without examining its hinge-teeth, as to notice the outside only of a Chiton. The synonymy is believed to be practically exhaustive, except that useless references to mere lists giving no new information are omitted. Attention should here be directed to the new theories of the origin of important structures of shell and girdle, given on pp. Ix, xii; to the original system of classification (p. Xxiii), and the phylogenies (pp. Xxvii, xxviii). 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.

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