﻿U. 
  S. 
  NATION/4L 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  XX 
  PL. 
  XXXll 
  

  

  

  

  

  

  Parasitic 
  Worm 
  {Dihufhriuiin 
  from 
  Rock 
  Cod. 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  465. 
  

  

  