CONTENTS. 



Pago. 



Introductory 3 



The Cumberland River 4 



General description 4 



Physiography 5 



■ Comparison with the Maumee and Kankakee Rivers 6 



Characteristics of the mussel fauna 6 



Geographical distribution 7 



Contrast between the river above and below the fall? 7 



Faunistic divisions below the falls 8 



First section — Cumberland Falls to Celina, Tenn 8 



Second section — Celina to Nashville, Tenn 9 



Third section — Nashville to Dover, Tenn 11 



Fourth section — Dover, Tenn. , to Smithland, Ky 12 



Tabular statement of distribution of species 13 



Relative abundance of different species 20 



Summary of distribution 21 



Notes on various stations 23 



Upper river and its tributaries 23 



River below the falls and its tributaries 24 



Character of water of the Cumberland River 38 



Commercial value of Cumberland shells 39 



Breeding season of Cumberland mussels 41 



Pearls and pearling 42 



Discussion of mussel species 45 



2 



