CONTENTS. 



Preface, ...... , . ix 



Introductory, 11 



Explanation of the parts of shells, .... 15 



Multi valve, 15 



Bivalve, 17 



Description of plate IV — Hinges of the Liiinean 



Genera of Bivalves 21 



Univalve, .21 



Of the Linnean Genera, 28 



Order I— Multi valve Shells, . . . .28 

 IL— Bivalve Shells, .... 31 



III. — Univalve Shells, . . . .40 

 Table of the Linnean Genera of shells, with Lamarck's 



Divisions .53 



Lamarck's Genera of Shells, .... 56 



Class First.— Testaceous Mollusca, 



Order I. — Heteropoda, 5G 



II. — Cephalopoda, .... 57 



III.— Trachelipoda, .... 65 



IV. — Gasteropoda, ... .93 

 v.— Pteropoda, 104 



Class Second. — Conchifera, .... 106 



Order L— Monomyaira, . . . 106 



IL — Dimyaira, .... 118 



Class Third. — Cirripeda, 148 



Order I.— Pedunculata, .... 148 



IL— Sessilia, 150 



