﻿850 
  PALI!' 
  )\T< 
  )[.<>( 
  ;y 
  QF 
  1 
  1. 
  1. 
  1 
  N< 
  US. 
  

  

  cations, 
  I. 
  ut 
  perhaps 
  not 
  quite 
  so 
  marker 
  place 
  in 
  Qranatt 
  

  

  "" 
  -/( 
  0. 
  & 
  Sham., 
  and 
  in 
  Schizoblast 
  

  

  Slmm. 
  

  

  /• 
  vtremitea 
  Oodoni 
  De 
  Frame, 
  in 
  its 
  earlier 
  - 
  

   and 
  resembles 
  1'. 
  pyriforn 
  Inter 
  on 
  it 
  is 
  globose. 
  Tip 
  

  

  portions, 
  from 
  the 
  basals 
  to 
  the 
  radial 
  lips, 
  ladly 
  turbinate 
  

  

  and 
  decidedly 
  longer 
  than 
  the 
  summit 
  portions. 
  Aiterwai 
  

   become 
  almost 
  horizontal, 
  and 
  occupy, 
  in 
  

  

  than 
  three-fourths 
  tbe 
  height 
  of 
  the 
  i 
  a 
  time 
  when 
  the 
  am- 
  

  

  bulacra, 
  which 
  at 
  tirst 
  wen 
  scarcely 
  loi 
  _'■ 
  r 
  than 
  wide, 
  attain 
  a 
  length 
  

   of 
  more 
  than 
  three 
  times 
  their 
  • 
  width. 
  

  

  The 
  modifications 
  which 
  hi 
  - 
  and 
  ra 
  I 
  

  

  are 
  mainly 
  produced 
  by 
  the 
  increase 
  in 
  the 
  length 
  of 
  the 
  ambulacra. 
  

   These 
  plates, 
  and 
  particularly 
  the 
  basals, 
  had 
  acquired 
  already 
  

   ••in 
  earl 
  a 
  comparatively 
  <■ 
  : 
  later 
  on 
  tin 
  body 
  of 
  the 
  

  

  radials 
  increased 
  much 
  less 
  in 
  length 
  than 
  in 
  width, 
  as 
  shown 
  by 
  

   the 
  lines 
  of 
  growth, 
  which 
  are 
  Bometimee 
  expos* 
  1. 
  The 
  1 
  iw« 
  

  

  i 
  i\ 
  which 
  hi 
  tied 
  almost 
  their 
  full 
  height, 
  and 
  now 
  had 
  to 
  

  

  accommodate 
  them 
  I 
  • 
  the 
  ii 
  ; 
  width 
  of 
  the 
  radials, 
  bend 
  

  

  outward, 
  prodaoing 
  thereby 
  the 
  angularity 
  at 
  the 
  outer 
  Bide 
  of 
  I 
  

   radial 
  cup, 
  by 
  leaving 
  the 
  lower 
  thickened 
  portions, 
  which 
  were 
  leas 
  

   pliable, 
  in 
  their 
  former 
  position. 
  Tins 
  explains 
  fully 
  th. 
  .\. 
  

  

  find 
  it 
  in 
  Codonites, 
  Coda 
  .. 
  in 
  Pentremket, 
  however, 
  under 
  

  

  similar 
  conditions 
  additional 
  modifications 
  ha\. 
  taken 
  pis 
  

   Restricting 
  the 
  Pentrm 
  with 
  lai 
  

  

  ambulacra, 
  most 
  of 
  them 
  have 
  at 
  the 
  lower 
  end. 
  at 
  the 
  junction 
  with 
  

  

  the 
  column, 
  a 
  little 
  projection 
  in 
  form 
  of 
  a 
  cone, 
  which 
  is 
  almost 
  as 
  

   prominent 
  in 
  small 
  Bpecimi 
  ;u 
  the 
  larger 
  ones. 
  Tin- 
  in- 
  

  

  stitutes 
  the 
  lower 
  part 
  of 
  what 
  appears 
  to 
  he 
  a 
  tri-partib 
  in 
  

  

  form 
  of 
  a 
  clover 
  leaf, 
  occupying 
  thi 
  I 
  u 
  of 
  the 
  basal 
  

  

  disc, 
  into 
  which 
  it 
  • 
  . 
  folio* 
  

  

  ture. 
  I 
  [uently 
  somewhal 
  < 
  levated 
  aboi 
  

  

  of 
  the 
  basals, 
  and 
  oan 
  I 
  with 
  tl 
  

  

  naK. 
  .1 
  . 
  ye. 
  The 
  Butures 
  whicl 
  a 
  by 
  thi 
  

  

  ■ 
  the 
  lower 
  lea\ 
  

  

  appearant 
  i 
  y 
  much 
  inclined 
  

  

  part 
  of 
  the 
  basals 
  I 
  in 
  hid. 
  pendenl 
  

  

  i 
  interi 
  

   which 
  I 
  tal 
  f 
  i;n- 
  

  

  tremUet 
  Oodoni, 
  I 
  find 
  within 
  the 
  

   tors, 
  but 
  ol 
  ith. 
  and 
  bl 
  joints 
  of 
  the 
  column. 
  

  

  