X TABLE OF CONTENTS. 



Systematic list — Continued. Page. 



Class Scaphopoda 180 



Order Solonoconeha 180 



Family Dentaliidae 180 



Genus Dentalium 180 



Genus Schizodentalium 181 



Class Pelecypoda 181 



Order Prionodesmacea 181 



Family Nuculidae 181 



Genus Nucula 181 



Family Limopsidae 181 



Genus Limopsis 181 



Family Arcidae 181 



Genus Glycimeris 181 



Genus Area 182 



Genus Fossularca 182 



Genus Barbatia 182 



Family Pinnidae 183 



Genus Pinna 183 



Genus Atrina 183 



Genus Hochstetteria 184 



Genus Philubrya 185 



Family Pteriidae 185 



Genus Margaritiphora 185 



Family Ostreidae 185 



Genus Ostrea 185 



Family Pectinidae 186 



Genus Pecten 186 



Family Spondylidae 186 



Genus Plicatula 186 



Family Limidae 186 



Genus Lima 186 



Family Anomiidae 187 



Genus Anomia 187 



Family Mytilidae 188 



Genus Mytilus ." 188 



Genus Modiola 188 



Genus Crenella 189 



Genus Modiolaria 189 



Order Anomalodesmacea 190 



Family Solemyidae 190 



Genus Solemya 190 



Family Lyonsidae 191 



Genus Lyonsia 191 



Family Thracidae 191 



Genus Thracia 191 



Genus Clistoconcha 191 



Order Teleodesmacea 191 



Family Crassatellitidae 191 



Genus Crassatellites 191 



Genus Cuna 191 



