﻿PLATE 
  XV. 
  

  

  Lecanocrinus 
  pcjsillus 
  Hall. 
  

   Page 
  136. 
  

   Figs. 
  1, 
  5. 
  Anterior 
  and 
  posterior 
  views 
  of 
  a 
  calyx 
  preserving 
  the 
  first 
  and 
  sec- 
  

   ond 
  anal 
  plates; 
  enlarged 
  to 
  two 
  diameters. 
  

   Figs. 
  3, 
  4. 
  Similar 
  views 
  of 
  another 
  specimen, 
  natural 
  size, 
  where 
  the 
  two 
  anal 
  

  

  plates 
  of 
  the 
  preceding 
  specimen 
  are 
  represented 
  by 
  one 
  only. 
  

   Fig. 
  2. 
  The 
  lower 
  side 
  of 
  the 
  last 
  specimen, 
  showing 
  the 
  size 
  of 
  the 
  basal 
  

  

  plates. 
  

   Fig. 
  6. 
  An 
  enlargement 
  of 
  a 
  first 
  radial 
  plate, 
  to 
  show 
  the 
  surface-markings. 
  

  

  Cyathocrinus 
  nucleus 
  Hall. 
  

   Page 
  136. 
  

  

  Figs. 
  7, 
  8. 
  Lateral 
  and 
  anterior 
  sides 
  of 
  the 
  specimen, 
  enlarged 
  to 
  four 
  diameters, 
  

  

  showing 
  its 
  form 
  and 
  character. 
  

   Fig. 
  9. 
  Basal 
  view 
  of 
  the 
  same, 
  enlarged 
  to 
  four 
  diameters 
  showing 
  the 
  lobation 
  

  

  of 
  the 
  bod}?- 
  at 
  the 
  base 
  of 
  the 
  arms. 
  

  

  Cyathocrinus 
  Polyxo 
  Hall. 
  

  

  Page 
  135. 
  

  

  Figs. 
  10, 
  11. 
  Lateral 
  and 
  basal 
  views 
  of 
  a 
  small 
  specimen 
  showing 
  the 
  basal 
  plates 
  

  

  with 
  a 
  small 
  perforation 
  in 
  the 
  middle. 
  

   Fig. 
  12. 
  Anterior 
  view 
  of 
  a 
  larger 
  specimen, 
  showing 
  the 
  usual 
  character 
  of 
  the 
  

  

  species. 
  

   Figs. 
  13, 
  14. 
  Posterior 
  and 
  basal 
  views 
  of 
  a 
  large 
  individual, 
  showing 
  the 
  very 
  

  

  large 
  second 
  anal 
  plates, 
  and 
  large 
  opening 
  through 
  the 
  basals. 
  In 
  

  

  this 
  specimen 
  the 
  angular 
  character 
  of 
  the 
  plates, 
  as 
  observed 
  in 
  

  

  younger 
  specimens, 
  is 
  greatly 
  subdued. 
  

   Figs. 
  15, 
  16. 
  Posterior 
  and 
  basal 
  views 
  of 
  a 
  specimen, 
  showing 
  features 
  similar 
  

  

  to 
  the 
  last. 
  

   Fig. 
  17. 
  Posterior 
  side 
  of 
  a 
  specimen, 
  showing 
  a 
  part 
  of 
  a 
  third 
  anal 
  plate. 
  

  

  Khodocrinus 
  (Lyriocrinus) 
  Melissa 
  Hall. 
  

  

  Page 
  139. 
  

  

  Fig. 
  18. 
  The 
  summit 
  of 
  a 
  large 
  individual 
  preserving 
  the 
  plates 
  of 
  the 
  dome 
  

   and 
  also 
  showing 
  evidence 
  of 
  a 
  subcentral 
  proboscis. 
  

  

  Fig. 
  19. 
  Basal 
  view 
  of 
  a 
  large 
  imperfect 
  specimen, 
  showing 
  flattened 
  nodes 
  on 
  

   the 
  subradial 
  plates. 
  

  

  Figs. 
  20, 
  21. 
  Basal 
  and 
  lateral 
  views 
  of 
  a 
  very 
  symmetrical 
  specimen, 
  presenting 
  

   the 
  general 
  form 
  and 
  features 
  of 
  the 
  species 
  to 
  the 
  arm-bases. 
  

  

  Fig. 
  22. 
  Basal 
  view 
  of 
  a 
  specimen 
  of 
  ordinary 
  size, 
  showing 
  a 
  thickened, 
  de- 
  

   pressed, 
  pentagonal 
  ring 
  around 
  the 
  column 
  cicatrice, 
  and 
  incipient 
  

   or 
  developed 
  nodes 
  on 
  the 
  first 
  radial 
  plates. 
  The 
  surface 
  of 
  the 
  

   plates 
  is 
  beautifully 
  striated. 
  

  

  