CONTENTS. 



Page. 



Letter of transmittal 3 



Introductory remarks 5 



Annotated and illustrated catalogue 14 



Conchifera 14 



Ostreidie , 14 



AnomiidsB 15 



Mytilidie 17 



Unionidfe 18 



Cyrenidje 29 



Pisidiidfe 34 



Corbulida? 35 



Gasteropoda 37 



Auriculid;e 37 



LimnaiidiB 38 



Physidse 43 



Ancylidse 45 



Vitrinidfe 46 



Arionidae 46 



Helicidse 47 



Pupidse 49 



Succinidse 51 



Neritidfe 51 



Oerithidfe 53 



Melauiidro 53 



Ceriphasiid;e 56 



Eissoid.T; 59 



Viviparidse 60 



Valvatidse 64 



Tabular view of the non-marine fossil mollusca of North America 66 



Spurious and doubtful species 72 



General discussion 73 



in 



