﻿MUSSEL 
  RESOURCES 
  IN 
  TRffiUTARIES 
  OF 
  THE 
  

   UPPER 
  MISSOURI 
  RIVER 
  

  

  By 
  Robert 
  E, 
  Coker^ 
  Director 
  

  

  AND 
  

  

  John 
  B. 
  SoUTHALL, 
  Shell 
  Expert 
  

  

  United 
  States 
  Biological 
  Station 
  

   Fairport, 
  Iowa 
  

  

  Appendix 
  IV 
  to 
  the 
  Report 
  of 
  the 
  U. 
  S. 
  Commissioner 
  

   of 
  Fisheries 
  for 
  I9I4 
  

  

  