CONTENTS. 
ees 
Description of the Frontispiece +++: +*-++++++> Page v 
INTRODUCTION eereceressceees saeysieis ROBO OOO UC oO C ix 
CLASSIFICATION <+-e-s SA CHU OIIO CODCOODDOOUORS OOD rraredsis{ saliy 
LI. Multivalves ---+--cececccc cece ce cnec cere er erence Xill 
IL. Bivalves << -022 00 cee csn ss crcccerensscccssscencs Xili 
Ill. Univalves.—1. With a regular spire ++++-++++++: xiv 
2. Without a regular spire ------- “s OKYV 
I. MULTIVALVES. 
Giaitonl os 2s <2 20sec pip isioisislelersisinlelcteletaie BOO OOM OOO OOaG 1 
Lepas ee ee co 5 
Pholas «+ -e-sccscess>: + cece Oot ciakeloish nioiioret lovee at every gestads 11 
Mya Biotajstslslieiel <Kaisiseaciele/avetalelsiaielslcusiel ste lotallatete(avetele piaisiatelies 15 
LETT ere ce eae sb rene siGis) ssaal eee eee ree ema e a Pee issoiey ata Retioul Le) 
Alvesibinvaiete serie ee ol oro iano hore oioisvchaievel elevetefolsiels aleyele sleielenay 23 
(Chriliim! scoobpoonunocbudcabloceuons0 DoccC Dab aD GODGUE 29 
Mactra o-e+ core sccr secs cers cscces Ri alcvatialay cictievehever el nret v 33 
