﻿EXPERIMENTS 
  IN 
  PROPAGATION 
  OF 
  FRESH-WATER 
  

   MUSSELS 
  OF 
  THE 
  QUADRULA 
  GROUP 
  

  

  By 
  Arthur 
  Day 
  Howard 
  

  

  Scientific 
  Assistatit, 
  United 
  States 
  Bureau 
  of 
  Fisheries 
  

  

  Appendix 
  IV 
  to 
  the 
  Report 
  of 
  the 
  U. 
  S. 
  Commissioa£r 
  

   of 
  Fisheries 
  for 
  1913 
  

  

  22889°— 
  14 
  26 
  

  

  