﻿I. 
  — 
  Comparative 
  

  

  Classification 
  of 
  

   Barrois. 
  

  

  JBelemnitella 
  mucro- 
  

   nata 
  = 
  White 
  

   Limestone 
  with 
  

   flints. 
  

  

  sular 
  Division. 
  

  

  [To 
  face 
  p. 
  568. 
  

  

  be 
  Limestone 
  

   ints. 
  Cephalo- 
  

  

  etc, 
  very 
  

   mon 
  at 
  base. 
  

  

  Northern 
  Division. 
  

  

  White 
  Limestone 
  

   with 
  flints 
  100 
  feet 
  + 
  

  

  thick, 
  with 
  

  

  JSchinocorys 
  ovatus 
  

  

  at 
  base. 
  

  

  England. 
  

  

  White 
  Chalk 
  of 
  

   Trimmingham. 
  

  

  White 
  Limestone, 
  

  

  with 
  large 
  flints 
  

  

  above. 
  

  

  