﻿[To 
  face 
  p. 
  G18. 
  

  

  ram-Sections 
  o 
  

  

  ed 
  bivalves. 
  

  

  a, 
  Pratt, 
  

  

  kinttscula, 
  B. 
  

  

  ovalis 
  . 
  many 
  

  

  semicanaliculutus 
  ? 
  

  

  (eras, 
  shells, 
  wood. 
  

  

  r 
  fossils.) 
  

  

  leras 
  (very 
  large 
  species). 
  

  

  jaculum? 
  (small 
  form: 
  rare). 
  

  

  ula 
  subangulata, 
  &c. 
  ; 
  JEchinospatangus 
  cordiformis 
  (one 
  spm.). 
  

  

  ceras, 
  Exogyra, 
  shells. 
  

  

  semicanalieidatus?, 
  Vermicularia 
  Soiverbyi, 
  &c. 
  

   semicanalieidatus 
  ?, 
  I?e£. 
  jaculum. 
  

   s 
  of 
  SeZ. 
  jaculum. 
  

  

  