﻿274 
  ru.KONToLor.Y 
  OF 
  CLLINOH 
  

  

  below, 
  Etadials 
  about 
  twic- 
  as 
  large 
  as 
  the 
  smaller 
  subradials, 
  four 
  

   of 
  them 
  pentagonal 
  and 
  one 
  on 
  the 
  right 
  posterior 
  side 
  he] 
  

   counting 
  thr. 
  low. 
  

  

  Braobials, 
  five 
  to 
  the 
  ant. 
  rim- 
  ray. 
  the 
  first 
  one 
  of 
  which 
  

  

  as 
  the 
  first 
  radial, 
  hut 
  constricted 
  above 
  to 
  correspond 
  

   with 
  the 
  narrow, 
  eding 
  plates, 
  which 
  art- 
  quadrangular 
  

  

  narrowly 
  rounded 
  on 
  their 
  external 
  Burfaces. 
  The 
  fifth 
  brachial 
  is 
  

   angular 
  above, 
  a 
  little 
  wider 
  than 
  thot 
  •. 
  and 
  pport 
  

  

  on 
  its 
  upper 
  sloping 
  sides 
  to 
  the 
  first 
  divisions 
  of 
  tin 
  ray, 
  which 
  

   thence 
  continue 
  simple 
  to 
  their 
  extremities. 
  

  

  The 
  four 
  other 
  radials 
  have 
  each 
  a 
  >iii'_'le 
  brachial, 
  which 
  is 
  as 
  

   wid< 
  as 
  the 
  radial 
  on 
  which 
  it 
  rests, 
  with 
  a 
  gaping 
  Butun 
  

   all 
  pentangular, 
  and 
  supporting 
  on 
  their 
  sloping 
  upper 
  angh 
  

   first 
  divisions 
  of 
  the 
  rays. 
  

  

  The 
  left 
  anterolateral 
  ray, 
  after 
  its 
  first 
  bifurcation 
  on 
  the 
  bra- 
  

   chial 
  plate, 
  divides 
  again 
  on 
  the 
  sixth 
  plate 
  above, 
  and 
  the 
  outer 
  

   division 
  twice 
  more 
  on 
  the 
  seventh 
  or 
  eighth 
  plate, 
  while 
  in 
  the 
  

   right 
  antero-lateral 
  both 
  division- 
  bifurcate 
  on 
  the 
  sixth 
  plate, 
  and 
  

   the 
  outer 
  division 
  again 
  on 
  the 
  seventh 
  or 
  eighth 
  plate, 
  making 
  live 
  

   divisions 
  to 
  this 
  ray, 
  which 
  is 
  probably 
  the 
  normal 
  number 
  in 
  all 
  

  

  the 
  rayfi 
  < 
  icepi 
  the 
  anterior 
  one, 
  or 
  twenty-two 
  in 
  the 
  coniplei 
  

  

  ganism. 
  The 
  arms 
  are 
  oomposed 
  of 
  rounded, 
  wedge-formed 
  i 
  

   giving 
  off 
  Btrong 
  pinnules 
  alternately 
  from 
  their 
  Long* 
  -t 
  aides; 
  pin- 
  

   nules 
  oomposed 
  of 
  rounded 
  joints 
  about 
  twice 
  as 
  long 
  as 
  wide. 
  

   Anal 
  plates, 
  five 
  visible. 
  The 
  first 
  one 
  is 
  p* 
  i 
  1. 
  and 
  

  

  between 
  the 
  upper 
  angles 
  of 
  the 
  two 
  Buhradials 
  and 
  partly 
  under 
  the 
  

   lower 
  angle 
  of 
  the 
  right 
  posterior 
  radial. 
  T 
  id 
  anal 
  is 
  larger 
  

  

  than 
  tin 
  first, 
  hexagonal, 
  and 
  rests 
  upon 
  one 
  of 
  the 
  Buhradials, 
  and 
  

  

  ads 
  above 
  the 
  top 
  of 
  the 
  left 
  p 
  radial. 
  The 
  third 
  

  

  is 
  hexagonal, 
  about 
  a> 
  I 
  the 
  first, 
  on 
  which 
  it 
  nd 
  it 
  

  

  da 
  nearly 
  half 
  ita 
  length 
  above 
  the 
  top 
  of 
  the 
  i" 
  radial 
  

  

  on 
  the 
  right. 
  The 
  fourth 
  and 
  fifth 
  ana 
  mailer, 
  the 
  

  

  n 
  top 
  of 
  the 
  second 
  anal 
  an. 
  I 
  tin 
  other 
  on 
  the 
  tfa 
  umn 
  

  

  unknown. 
  

  

  logical 
  potition 
  <ui<l 
  locality 
  Pop 
  of 
  tl 
  

   the 
  Keokuk 
  group, 
  one 
  mile 
  belo* 
  Keokuk, 
  Iowa. 
  

  

  -I 
  an. 
  I 
  •_' 
  I 
  : 
  of 
  Mr. 
  1.. 
  \ 
  ' 
  m. 
  

  

  in 
  d« 
  .1 
  ttiful 
  a] 
  rthy 
  

  

  fn. 
  nd 
  John. 
  

  

  