﻿Report 
  U. 
  S. 
  F. 
  C 
  1897, 
  (To 
  face 
  page 
  340.) 
  

  

  Plate 
  X. 
  

  

  

  OYSTER 
  SPAT 
  TWO 
  OR 
  THREE 
  WEEKS 
  OLD 
  ON 
  INSIDE 
  OF 
  OYSTER 
  SHELL. 
  

   NATURAL 
  SIZE, 
  

  

  