﻿Goniophora 
  abbreviata 
  Clarke 
  f 
  

  

  Fig. 
  i, 
  2 
  Sculpture 
  casts 
  of 
  right 
  valves 
  

  

  Locality: 
  Jaguariahyva, 
  Sao 
  Paulo, 
  Brazil 
  

  

  Palaeanatina 
  erebus 
  Clarke 
  

  

  Fig. 
  3> 
  4> 
  5 
  Conjoined 
  expanded 
  valves 
  

  

  Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  Cypricardella? 
  olivieria 
  Clarke 
  

  

  Fig. 
  6 
  Conjoined 
  valves, 
  natural 
  size 
  

   7 
  The 
  left 
  valve, 
  x 
  3 
  

   Locality: 
  Ponta 
  Grossa, 
  Brazil 
  : 
  

  

  Sphenotus 
  lagoensis 
  Clarke 
  

  

  Fig. 
  8 
  Expanded 
  conjoined 
  valves 
  with 
  the 
  crescence 
  ridge 
  some- 
  

   what 
  intensified 
  by 
  compression 
  

   9 
  A 
  right 
  valve 
  

  

  Locality: 
  Lago, 
  state 
  of 
  Sao 
  Paulo, 
  Brazil 
  

  

  Leptodomus 
  capricornus 
  Clarke 
  

  

  Fig. 
  10 
  A 
  right 
  valve 
  

  

  1 
  1 
  A 
  left 
  valve 
  

  

  12 
  Enlargement 
  of 
  posterior 
  slope 
  

   Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  178 
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