Manual of Conchology, Vol. 14: Structural and Systematic, With Illustrations of the Species (Classic Reprint) - Hardcover

Jr., George W. Tryon

9780666718297: Manual of Conchology, Vol. 14: Structural and Systematic, With Illustrations of the Species (Classic Reprint)

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ISBN 10: 0666718296 ISBN 13: 9780666718297

Publisher: Forgotten Books, 2019

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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).

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