﻿IDENTIFICATION 
  OF 
  THE 
  GLOCHIDIA 
  OF 
  

   FRESH-WATER 
  MUSSELS 
  

  

  By 
  Thaddeus 
  Surber 
  

  

  Assistant, 
  United 
  States 
  Biological 
  Laboratory 
  

   Fairport, 
  Iowa 
  

  

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

  

  of 
  Fisheries 
  for 
  I9I4 
  

   71531°— 
  15 
  

  

  