TABLE OF CONTENTS. 



Page. 



DEDICATION iii 



TABLE OF CONTENTS v 



ADDENDA AND CORRIGENDA vi 



PREFACE vii-x 



SYNOPSIS OF THE GENERA •. . xi-xiv 



INDEX . xv-xviii 



DESCRIPTIONS OF SPECIES 1-268 



aviculopecten ............ 1-40 



Lyriopecten ............. 40-57 



Pterinopecten 57-81 



Ckenipecten 81-90 



Pterinea 91-103 



S. G. Vertdmnia 104-107 



actinopteria ............. 107-128 



Pttchopteria 129-152 



Glyptodesma ............. 153-157 



Leiopteria ............. 158-174 



Leptodesma ............. 175-236 



Pteronites 237-239 



Paljjopinna 240-241 



Ectenodesma 242-243 



Limoptera ..........■■■ 243-251 



Byssopteria ' 252 



Mytilarca 253-264 



S. G. Plethomytilus 253-256 



GOSSELETTIA 265-266 



MoDiOLA, S. G. Mytilops 267-268 



PLATES AND EXPLANATIONS i-xxxiii and lxxxi-xcii 



