﻿U. 
  S. 
  B. 
  F.— 
  Doc. 
  812. 
  

  

  Plate 
  I. 
  

  

  VIEWS 
  OF 
  THE 
  SHELL 
  OF 
  A 
  MUSSEL 
  COLLECTED 
  IN 
  THE 
  JAMES 
  RIVER 
  

   AT 
  HURON, 
  S. 
  DAK. 
  

  

  The 
  specimen 
  could 
  be 
  referred 
  to 
  no 
  previously 
  described 
  species 
  or 
  genus. 
  

  

  