﻿CONTENTS. 
  

  

  Page. 
  

  

  Field 
  of 
  investigation 
  5 
  

  

  James 
  River 
  6 
  

  

  Character 
  of 
  the 
  James 
  River 
  draina<^e 
  area 
  10 
  

  

  Natural 
  propagation 
  of 
  mussels 
  in 
  relation 
  to 
  flood 
  stages 
  in 
  the 
  James 
  River. 
  . 
  12 
  

  

  Vermilion 
  River 
  13 
  

  

  Examination 
  of 
  other 
  streams 
  14 
  

  

  Summary 
  15 
  

  

  Appendix 
  — 
  Description 
  of 
  shell 
  found 
  in 
  the 
  James 
  River 
  at 
  Huron, 
  S. 
  Dak., 
  

  

  July 
  27, 
  1913 
  17 
  

  

  3 
  

  

  