﻿State 
  Mas 
  .TtfatHist., 
  28. 
  

  

  ( 
  GAS 
  TEEOPODA.) 
  

  

  Plate 
  29. 
  

  

  G-.B. 
  Simp 
  on 
  del, 
  

  

  PkAst 
  Litb 
  

  

  