﻿PLATE 
  XXIY. 
  

  

  Spikifeka 
  ceispa 
  (Hi-singer) 
  car. 
  sjatplex 
  n. 
  var. 
  

  

  Page 
  157. 
  

   Figs. 
  1-5. 
  Dorsal, 
  ventral, 
  front, 
  lateral 
  and 
  cardinal 
  views 
  of 
  a 
  specimen 
  of 
  this 
  

   variety, 
  enlarged 
  to 
  two 
  diameters. 
  

  

  Spieifeea 
  ceispa 
  (Hisinger). 
  

  

  Page 
  157. 
  

  

  Fig. 
  6. 
  Dorsal 
  view 
  of 
  a 
  specimen 
  of 
  the 
  size 
  and 
  form 
  usually 
  obtained 
  at 
  this 
  

  

  locality. 
  

   Fig. 
  7. 
  Ventral 
  view 
  of 
  a 
  wider 
  form. 
  

   Figs. 
  8-12. 
  Dorsal, 
  ventral, 
  front, 
  cardinal 
  and 
  lateral 
  views 
  of 
  a 
  larger 
  specimen 
  

  

  showing 
  the 
  characters 
  of 
  the 
  species, 
  as 
  it 
  occurs 
  at 
  Waldron. 
  

   Fig. 
  19. 
  The 
  interior 
  of 
  a 
  ventral 
  valve, 
  enlarged 
  to 
  two 
  diameters. 
  

  

  Spieipeea 
  Eudoea 
  Hall. 
  

   Page 
  156. 
  

  

  Figs. 
  13-16. 
  Dorsal, 
  cardinal, 
  front 
  and 
  lateral 
  views 
  of 
  a 
  specimen, 
  presenting 
  

   the 
  features 
  of 
  the 
  species 
  from 
  the 
  "Waldron 
  locality. 
  

  

  Fig. 
  17. 
  A 
  ventral 
  valve, 
  having 
  the 
  surface-striae 
  strongly 
  marked. 
  

  

  Fig. 
  18. 
  Interior 
  of 
  a 
  ventral 
  valve, 
  showing 
  the 
  cardinal 
  area, 
  the 
  foramen 
  and 
  

   teeth. 
  

  

  Spieifeea 
  eadiata 
  Sowerby. 
  

  

  Page 
  157. 
  

  

  Fig. 
  20. 
  Dorsal 
  view 
  of 
  a 
  specimen 
  of 
  medium 
  size. 
  

  

  Fig. 
  21. 
  Dorsal 
  view 
  of 
  a 
  nearly 
  full-grown 
  specimen. 
  

  

  Figs. 
  22—26. 
  Dorsal, 
  ventral, 
  cardinal, 
  lateral 
  and 
  front 
  views 
  of 
  a 
  large 
  well- 
  

   formed 
  specimen, 
  of 
  the 
  usual 
  characters 
  of 
  the 
  species 
  as 
  recog- 
  

   nized 
  at 
  this 
  locality. 
  

  

  Fig. 
  27. 
  Profile 
  view 
  of 
  the 
  specimen 
  fig. 
  21, 
  for 
  comparison 
  with 
  fig. 
  25. 
  

  

  Fig. 
  28. 
  The 
  interior 
  of 
  a 
  ventral 
  valve. 
  

  

  Fig. 
  29. 
  The 
  interior 
  of 
  the 
  cardinal 
  portion 
  of 
  a 
  dorsal 
  valve. 
  

  

  Fig. 
  30. 
  An 
  enlargement 
  of 
  the 
  surface-striae. 
  Figs. 
  17, 
  19. 
  22, 
  2S, 
  29 
  and 
  30 
  

   are 
  copied 
  from 
  Pal. 
  X. 
  Y.. 
  Vol. 
  IV, 
  Pt. 
  II 
  : 
  Recision 
  of 
  the 
  Bra- 
  

   cJiiopoda 
  (unpublished). 
  

  

  