﻿Prothyris 
  (Paraprothyris) 
  knodi 
  Clarke 
  

  

  Fig. 
  1, 
  2 
  Conjoined 
  valves, 
  showing 
  the 
  anterior 
  byssal 
  

  

  notch 
  and 
  posterior 
  cardinal 
  ridge 
  

   3, 
  4, 
  5, 
  6 
  Other 
  valves 
  showing 
  in 
  more 
  detail 
  the 
  cardinal 
  

  

  characters 
  

   7 
  Enlargement 
  of 
  posterior 
  part 
  of 
  specimen 
  figure 
  4 
  

  

  Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  Cardiomorpha 
  ? 
  colossea 
  Clarke 
  

  

  Fig. 
  8 
  Sculpture 
  cast 
  of 
  a 
  right 
  valve 
  of 
  medium 
  size 
  

  

  Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  172 
  

  

  