﻿FEOX 
  THE 
  LOWER 
  SILEEIAX 
  OF 
  XOETH 
  A3XEEICA. 
  515 
  

  

  Fig. 
  5. 
  Upper 
  surface 
  of 
  a 
  young 
  specimen 
  of 
  Ch<etetes 
  petropolitanus, 
  Pander, 
  

   of 
  the 
  natural 
  size. 
  

   5 
  a. 
  Under 
  surface 
  of 
  the 
  same, 
  natural 
  size. 
  

   5 
  b. 
  Profile 
  of 
  the 
  same, 
  natural 
  size. 
  

   5 
  c. 
  Portion 
  of 
  the 
  surface 
  of 
  the 
  same, 
  enlarged. 
  

  

  6. 
  A 
  specimen 
  of 
  Chcetetes 
  petropolitanus 
  (?) 
  attached 
  to 
  a 
  Brachiopod, 
  

  

  natural 
  size. 
  

  

  7. 
  Another 
  specimen 
  of 
  the 
  same 
  (?), 
  forming 
  an 
  apparently 
  unattached 
  

  

  nodidated 
  mass, 
  of 
  the 
  natural 
  size. 
  

  

  8. 
  A 
  flattened 
  specimen 
  of 
  the 
  same 
  (?), 
  haying 
  the 
  form 
  of 
  a 
  cardinal's 
  

  

  hat, 
  of 
  the 
  natural 
  size. 
  

  

  