﻿Plate 
  1G 
  

  

  Natural 
  size 
  unless 
  otherwise 
  stated 
  

  

  Page 
  

  

  PACHYLCCRINUS 
  AEOUALIS 
  i 
  Hall). 
  .__ 
  71 
  

  

  Fig. 
  1. 
  Posterior 
  view, 
  to 
  show 
  anal 
  side 
  passing 
  into 
  ventral 
  sac, 
  and 
  

   mode 
  of 
  arm 
  branching. 
  

  

  Keokuk 
  limestone; 
  Crawfordsville, 
  Indiana. 
  

  

  PACHYLOCRINUS 
  SCOPARIUS 
  (Hall) 
  G7 
  

  

  2. 
  Lateral 
  view, 
  1. 
  ant., 
  showing 
  the 
  sac 
  curving 
  upon 
  itself 
  toward 
  

   the 
  anterior. 
  

   Upper 
  Chester: 
  Grayson 
  Springs, 
  Kentucky. 
  

  

  PACHYLOCRINUS 
  ARBOREUS 
  i 
  Wort 
  hen 
  > 
  _ 
  ___ 
  65, 
  67, 
  73 
  

  

  3. 
  Anterior 
  view, 
  showing 
  structure 
  of 
  arms 
  and 
  pinnules. 
  X 
  f. 
  

  

  4. 
  Another 
  specimen, 
  1. 
  post, 
  view, 
  giving 
  also 
  a 
  basal 
  view 
  of 
  the 
  

  

  calyx. 
  X 
  §. 
  

  

  5. 
  R. 
  post, 
  radial 
  view 
  of 
  another 
  specimen, 
  showing 
  anal 
  side 
  and 
  

  

  curvature 
  of 
  inflated 
  sac 
  X 
  \ 
  

   b". 
  R. 
  ant. 
  radial 
  view, 
  showing 
  nearly 
  full 
  length 
  of 
  sac. 
  doubling 
  

  

  on 
  itself 
  toward 
  Hie 
  anterior, 
  with 
  opening 
  about 
  midway. 
  

  

  X 
  |. 
  

   7. 
  L. 
  post, 
  view 
  of 
  similar 
  specimen, 
  showing 
  full 
  length 
  of 
  sac, 
  

  

  with 
  curvature 
  in 
  side 
  view, 
  and 
  anal 
  opening 
  at 
  the 
  left. 
  

  

  X 
  |. 
  

   Lower 
  Chester; 
  Huntsville, 
  Alabama. 
  

  

  PACHYLOCRINUS 
  FLOREALIS 
  (Yandell 
  and 
  Shumard) 
  6",. 
  72 
  

  

  Fig. 
  8. 
  A 
  complete 
  crown, 
  showing 
  the 
  distal 
  end 
  of 
  the 
  sac 
  projecting 
  

   beyond 
  the 
  arms. 
  

   9. 
  Distal 
  portion 
  of 
  sac 
  from 
  another 
  specimen 
  with 
  spiniferous 
  pro- 
  

   jection, 
  and 
  the 
  anal 
  opening 
  next 
  to 
  it. 
  X 
  §. 
  

   9a. 
  The 
  spiny 
  projection 
  of 
  same 
  seen 
  from 
  the 
  upper 
  side, 
  consist- 
  

   ing 
  of 
  four 
  plates. 
  X 
  f. 
  

   Upper 
  Chester: 
  Grayson 
  Springs, 
  Kentucky. 
  

  

  PACHYLOCRINUS 
  AQUALIS 
  (Hall)__ 
  71 
  

  

  10. 
  Posterior 
  view 
  of 
  large 
  specimen 
  showing 
  full 
  length 
  of 
  sac 
  with 
  

   terminal 
  spine, 
  ami 
  arms 
  extending 
  beyond 
  it. 
  

   Lower 
  Burlington 
  Imestone; 
  Burlington, 
  Iowa. 
  

  

  ABROIOCRLNUS 
  RUSTICELLUS 
  (White) 
  Tl 
  

  

  11. 
  Complete 
  crown 
  with 
  pentagonal 
  stem 
  attached: 
  I. 
  ant. 
  view; 
  

   the 
  opposite 
  side 
  shows 
  the 
  sac 
  much 
  fractured, 
  in 
  t 
  extending 
  

   beyond 
  the 
  arms, 
  and 
  with 
  opening 
  about 
  midway. 
  

   Upper 
  Burlington 
  limestone: 
  Burlington, 
  Iowa. 
  

  

  123 
  

  

  