﻿Quart 
  . 
  Jcmrxi.Geol 
  . 
  Soc 
  .Vol 
  .LIE. 
  PI 
  . 
  XVII 
  

   1. 
  2 
  

  

  Echael 
  del.etlith. 
  Mm^er-n-B-ros 
  .imp. 
  

  

  THE 
  RAUENTHAL 
  SERPENTINE. 
  

   (Figs. 
  2-6.) 
  

  

  