﻿Ptomatis 
  moreirai 
  Clarke 
  

  

  Fig. 
  i, 
  2 
  Exteriors 
  of 
  two 
  examples 
  

  

  Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  Nuculites 
  reedi 
  Clarke 
  

  

  Fig. 
  3, 
  4, 
  5 
  Sculpture 
  casts 
  showing 
  the 
  sinuous 
  posterior 
  

   slopes 
  

   Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

  

  Nuculites 
  parai 
  Clarke 
  

  

  Fig. 
  6, 
  7 
  Sculpture 
  casts 
  from 
  the 
  Upper 
  Devonic 
  black 
  shale, 
  

   near 
  Erere, 
  State 
  of 
  Para, 
  Brazil 
  

  

  Nuculites 
  sharpei 
  Reed 
  

  

  Fig. 
  8 
  Sculpture 
  casts 
  of 
  both 
  valves 
  

  

  9, 
  io 
  Other 
  examples 
  of 
  the 
  species 
  

   Locality: 
  Ponta 
  Grossa, 
  Brazil 
  

   ii, 
  12 
  A 
  large 
  specimen 
  of 
  this 
  type 
  with 
  rather 
  heavy 
  clavicles 
  

   but 
  with 
  the 
  sinuous 
  posterior 
  slopes 
  

   Locality: 
  Pebble 
  island, 
  West 
  Falkland 
  

  

  x66 
  

  

  