﻿260 
  

  

  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Mar. 
  23, 
  

  

  S 
  

  

  <» 
  

   ^ 
  

  

  ^ 
  

  

  -<? 
  

  

  

  .---3 
  

  

  M 
  

  

  3 
  

  

  ? 
  

  

  = 
  — 
  

  

  a 
  

  

  

  13 
  

  

  Ej 
  

  

  Hd 
  

  

  

  cq 
  

  

  a 
  

   < 
  

  

  j= 
  

  

  

  &J3 
  

  

  3 
  

  

  u 
  

  

  T3 
  K 
  € 
  

  

  W^ 
  

  

  tf 
  

  

  

  £ 
  * 
  

  

  ^ 
  53 
  c 
  

  

  ra 
  c3 
  c3 
  

  

  So 
  03 
  

  

  be 
  

  

  o 
  

  

  

  1 
  

  

  — 
  

  

  g.~ 
  8 
  

  

  B 
  

  

  o 
  

  

  o 
  

  

  

  

  Ph 
  

  

  

  g.Ssci 
  

  

  a; 
  

  

  "3 
  

  

  

  

  TS 
  

  

  

  A 
  

  

  m 
  S-a 
  

  

  

  . 
  r 
  T~T 
  

  

  O 
  w 
  

  

  

  i— 
  3 
  CO 
  rfi 
  O 
  

  

  (H^ 
  

  

  <f£ 
  

  

  

  o 
  

  

  P 
  

  

  -* 
  

  

  

  »- 
  o 
  

  

  § 
  s 
  a 
  

  

  § 
  ? 
  3 
  

   wa 
  2 
  

  

  PS 
  Sh 
  5 
  

   <t> 
  O 
  CC 
  

  

  PhqO 
  

  

  