﻿Quart 
  . 
  Jaurn 
  . 
  Geol 
  . 
  Soc 
  VolXXXVULPUVlll 
  

  

  mt 
  

  

  

  i 
  

  

  A 
  S 
  .Foor-d.del 
  

  

  Mintern. 
  Bros 
  . 
  mrp 
  . 
  

  

  