﻿DEVELOPMENT 
  OF 
  THE 
  OYSTEE. 
  

  

  Plate 
  III. 
  

  

  

  'SU^O. 
  

  

  0Cf 
  

  

  CO; 
  

  

  "^^azz. 
  

  

  

  f 
  •■iir';'- 
  .'.'^faV'*" 
  iXn*''': 
  .'^'rtisS 
  

  

  

  

  W. 
  K. 
  Brooks, 
  Del. 
  

  

  

  Kc- 
  31. 
  

  

  

  Ftg^e* 
  

  

  

  