﻿

A 



Descriptive Catalogue 



OF THE 



Naiades, or Pearly Fresh- 

 Water Mussels 





BY 



CHARLES TORREY SIMPSON 



PART I 



UNIONID^ 

 TRUNCILLA — MARGARITANA 



'^N?^. 



BRYANT WALKER 



DETROIT, MICHIGAN 



1914 



MAY 03 1988 



