﻿278 
  PALEONTOLOGY 
  OF 
  ELLINO! 
  

  

  l'ol 
  1 
  i;l«>< 
  i.lNi 
  - 
  OOOTOBHTALIS, 
  Wortlien. 
  

   l'l. 
  XWII. 
  I 
  . 
  

  

  |. 
  a«e 
  10. 
  

  

  Body 
  cap-shaped, 
  about 
  twioe 
  as 
  wide 
  as 
  high. 
  ! 
  

   the 
  basals 
  small 
  and 
  hidden 
  under 
  the 
  first 
  columnar 
  joints. 
  Bub- 
  

   radialfl 
  hexagonal 
  and 
  heptagons!, 
  the 
  lower 
  angle 
  curving 
  ond< 
  

   form 
  a 
  part 
  of 
  the 
  basal 
  ooncavity. 
  

  

  Radials 
  pentangular, 
  nearly 
  tw 
  wide 
  as 
  Long, 
  with 
  a 
  gaping 
  

  

  suture 
  between 
  them 
  and 
  the 
  brachials. 
  

  

  chials 
  "ii 
  four 
  of 
  the 
  ray- 
  pentangular, 
  widest 
  below, 
  slightly 
  

   constricted 
  in 
  the 
  middle, 
  and 
  angular 
  above, 
  supporting 
  on 
  their 
  

   doping 
  Bides 
  the 
  firs! 
  division 
  of 
  the 
  rays, 
  another 
  bifurcation 
  

   takes 
  place 
  on 
  the 
  tenth 
  plate 
  above 
  the 
  brachials 
  in 
  these 
  four 
  

   beyond 
  which 
  they 
  are 
  Bimple 
  to 
  their 
  extremities. 
  The 
  anterior 
  

   brachial 
  is 
  quadrangular, 
  constricted 
  above, 
  and 
  sup] 
  ogle 
  

  

  arm, 
  making 
  17 
  anus 
  altogether 
  for 
  this 
  species. 
  

  

  anal 
  ride 
  of 
  the 
  specimen 
  is 
  distorted 
  so 
  that 
  the 
  number 
  and 
  

   form 
  of 
  the 
  anal 
  plates 
  cannot 
  be 
  clearly 
  determined 
  ; 
  but 
  thro 
  

   be 
  seen 
  : 
  the 
  second 
  one 
  much 
  larger 
  than 
  the 
  others, 
  and 
  apparently 
  

   arranged 
  as 
  usual 
  in 
  this 
  gens 
  

  

  Column 
  moderately 
  Btout, 
  round 
  and 
  composed 
  at 
  the 
  -ummit 
  of 
  

   evenly-sized 
  plates, 
  thai 
  alt. 
  mat. 
  with 
  thinner 
  low. 
  

  

  Thi- 
  Bpecies 
  i- 
  marly 
  related 
  to 
  / 
  tph.)u*icus, 
  of 
  Hall, 
  but 
  

  

  ssentially 
  from 
  that 
  in 
  the 
  number 
  and 
  bifurcation 
  of 
  the 
  

  

  aim-. 
  

  

  / 
  tition 
  and 
  locality 
  : 
  Dpper 
  beds 
  of 
  the 
  Keokuk 
  limestone, 
  Ham- 
  

   ilton. 
  Dlino 
  

  

  \ 
  ,. 
  I7'i 
  "( 
  Mr. 
  1,. 
  \. 
  < 
  lleetion. 
  

  

  l',,i 
  i 
  an 
  • 
  Worthi 
  n. 
  

  

  [y 
  ,,f 
  mediui 
  basin-shaped, 
  base 
  slightly 
  de] 
  the 
  

  

  .1 
  by 
  the 
  columnar 
  j. 
  3 
  ibradials 
  

  

  U, 
  and 
  breadth 
  about 
  equal, 
  the 
  lowi 
  

  

  