﻿Leptostrophia 
  concinna 
  (Morris 
  & 
  Sharpe) 
  

  

  Fig. 
  i 
  Internal 
  cast 
  of 
  ventral 
  valve 
  

  

  2 
  Interior 
  of 
  dorsal 
  valve 
  

  

  3 
  Internal 
  cast 
  of 
  ventral 
  valve 
  

  

  Localities: 
  Port 
  Howard, 
  West 
  Falkland, 
  and 
  Port 
  Louis, 
  

   East 
  Falkland 
  

  

  Schuchertella 
  agassizi 
  (Hartt 
  & 
  Rathbun) 
  

  

  Fig. 
  4 
  Two 
  characteristic 
  examples 
  showing 
  dorsal 
  aspect 
  only 
  

  

  5 
  Interior 
  of 
  ventral 
  valve 
  

  

  6 
  A 
  large 
  and 
  rather 
  short 
  hinged 
  example 
  

  

  7 
  Internal 
  cast 
  of 
  ventral 
  valve 
  

  

  8 
  Interior 
  of 
  dorsal 
  valve 
  

   Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  Schuchertella 
  sulivani 
  (Morris 
  & 
  Sharpe) 
  

  

  Fig. 
  9 
  Internal 
  cast 
  of 
  a 
  ventral 
  valve 
  

  

  • 
  Locality: 
  Fox 
  bay, 
  West 
  Falkland 
  

   io 
  Internal 
  cast 
  of 
  dorsal 
  valve 
  

   ii 
  Interior 
  of 
  dorsal 
  valve 
  

  

  12 
  Exterior 
  of 
  ventral 
  valve 
  

  

  13 
  Dorsal 
  aspect 
  of 
  conjoined 
  valves 
  

   Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  196 
  

  

  