﻿Plate 
  26 
  

  

  Figures 
  natural 
  size 
  unless 
  otherwise 
  stated 
  

  

  Page 
  

   HYBREIONOCRINUS 
  DEPRESSUS 
  (Hall 
  from 
  Troost) 
  89,90 
  

  

  Figs. 
  1, 
  2. 
  Posterior 
  views 
  of 
  complete 
  crowns, 
  showing 
  arrangernenl 
  

   of 
  anal 
  area, 
  mode 
  of 
  bifurcation 
  of 
  arms, 
  spiniferous 
  axil- 
  

   laries, 
  and 
  flattened 
  distal 
  end 
  of 
  sac 
  surmounting 
  the 
  whole, 
  

   with 
  spiniferous 
  peripheral 
  plates 
  projecting 
  laterally 
  from 
  

   the 
  margin 
  exceeding 
  in 
  diameter 
  all 
  I 
  lie 
  parts 
  below. 
  

   3. 
  L. 
  post, 
  view 
  of 
  similar 
  specimen. 
  

   4,5. 
  Anterior 
  views 
  of 
  two 
  similar 
  specimens, 
  showing 
  the 
  non- 
  

   spiniferous 
  IRr 
  in 
  anterior 
  ray, 
  succeeded 
  by 
  one 
  or 
  more 
  

   biserial 
  pairs 
  of 
  brachials 
  below 
  the 
  bifurcation. 
  

   6,7,8. 
  Basal 
  views 
  of 
  three 
  specimens, 
  showing 
  pentagonal 
  stem, 
  

   and 
  large 
  size 
  of 
  basal 
  cavity 
  as 
  compared 
  with 
  that 
  of 
  

   H. 
  wetherbyi. 
  

   9. 
  Basal 
  view 
  of 
  another 
  specimen, 
  showing 
  the 
  spiniferous 
  lib 
  - 
  

   in 
  the 
  four 
  rays 
  other 
  than 
  the 
  anterior. 
  

  

  10. 
  Anterior 
  view 
  of 
  specimen 
  with 
  arms 
  removed, 
  exposing 
  the 
  

  

  entire 
  length 
  of 
  ventral 
  sac, 
  with 
  the 
  anal 
  opening 
  half 
  way 
  

   up. 
  X 
  f. 
  

  

  11. 
  Distal 
  view 
  of 
  expanded 
  sac, 
  showing 
  the 
  numerous 
  plates 
  in 
  

  

  the 
  median 
  part 
  and 
  spiniferous 
  marginal 
  plates 
  — 
  about 
  25 
  

   in 
  all. 
  

  

  12. 
  The 
  same 
  parts 
  of 
  another 
  specimen, 
  seen 
  from 
  the 
  under 
  

   side, 
  showing 
  the 
  small 
  size 
  of 
  the 
  tube 
  leading 
  to 
  the 
  calyx. 
  

  

  Upper 
  Chester, 
  Glen 
  Dean 
  formation 
  : 
  Sloan's 
  Valley, 
  Ken- 
  

   tucky. 
  

  

  AGASSIZOCRINUS 
  LOBATUS, 
  new 
  species 
  63 
  

  

  Figs. 
  13, 
  14. 
  Lateral 
  views 
  of 
  infrabasal 
  cone, 
  showing 
  the 
  plates 
  divided 
  

   in 
  the 
  upper 
  part. 
  

   15,16. 
  Basal 
  views 
  of 
  two 
  other 
  specimens, 
  showing 
  lobatiou 
  of 
  in- 
  

   frabasal 
  cone, 
  rounded 
  and 
  coalesced 
  at 
  the 
  base, 
  and 
  par- 
  

   tially 
  divided 
  above. 
  

   17. 
  A 
  similar 
  specimen, 
  with 
  plates 
  almost 
  completely 
  divided. 
  

  

  and 
  faint 
  trace 
  of 
  column 
  facet. 
  

   IS. 
  Distal 
  view 
  of 
  another 
  specimen, 
  showing 
  division 
  of 
  infra- 
  

   basals, 
  and 
  the 
  axial 
  canals 
  passing 
  down. 
  

   Lower 
  part 
  of 
  Upper 
  Chester, 
  Gasper 
  formation 
  ; 
  Hunts- 
  

   ville. 
  Alabama. 
  

  

  WOODOCRINUS 
  MACRODACTYLUS 
  De 
  Koninek 
  77 
  

  

  Fig. 
  19. 
  Posterior 
  view 
  of 
  typical 
  specimen, 
  to 
  show 
  the 
  ponderous 
  arms, 
  

   extremely 
  short 
  brachials, 
  and 
  large 
  anal 
  area 
  indicating 
  a 
  

   strong 
  ventral 
  sac. 
  

  

  Upper 
  part 
  of 
  Lower 
  Carboniferous; 
  Richmond, 
  England. 
  

  

  133 
  

  

  