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and a complete alphabetical index.

The conclusion is reached that the fauna of this part of the coast includes about 1635 shell-bearing mollusks to which, if the naked Gastrapods, Heteropods, and Cephalopods were added, the total mollusk-fauna after all allowances were made would probably reach at least 1800 species.

Although this volume is chiefly a Catalogue and an Iconography, it seems proper to call attention to the fact that the arrangement adopted includes very extensive revision of the classificat on until lately in common use and an attempt has been made in the Gastropods as well as in the bivalves to incorporate such changes as the progress of recent years has shown to be necessary or advisable, the result being something decidedly different from the obsolete classification to be found in most Catalogues or Manuals accessible to students.