﻿DEVELOPMENT 
  OF 
  THE 
  OYSTER. 
  

  

  

  17 
  y 
  

  

  K,, 
  ... 
  - 
  ,. 
  

  

  

  Pie; 
  ^9 
  

  

  vrr'?''^"''''^"*^. 
  

  

  

  ..J.H'J&^r* 
  

  

  Ktf 
  34<. 
  

  

  Plate 
  IV. 
  

  

  T153O 
  

  

  W. 
  K. 
  Brooks, 
  Del. 
  

  

  T,Vg 
  35. 
  

  

  

  