CONTENTS. 



Page 



Pheface, ,.•,.. . , ix 



Introductory, ........ 11 



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



Multi valve, 15 



Bivalve, 17 



Description of plate IV. — Hinges of the Linnean 



Genera of Bivalves 21 



Univalve, ...... 21 



Of the Linnean Genera, 28 



Order I.— Multivalve Shells, .... 28 



IL— Bivalve Shells, .... 31 



III. — Univalve Shells, . . . .40 



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



Divisions. ....... . b'S 



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 



II. — Dimyaira, .... 118 



Class Third.— Cirripeda, . . , , . 148 



Order I.— Pedunculata, .... 148 



II. — Sessilia, 150 



