﻿Plate 
  4 
  

  

  Figures 
  not 
  otherwise 
  noted 
  natural 
  size 
  

  

  Page 
  

   MYELODACTYLUS 
  BRACHIATUS 
  Ball 
  10 
  

  

  Fig. 
  1. 
  Specimen 
  with 
  the 
  crown 
  preserved, 
  showing 
  the 
  extreme 
  length 
  

   and 
  slenderness 
  of 
  the 
  proximal 
  neck 
  leading 
  to 
  it 
  at 
  the 
  end 
  

   of 
  the 
  reversed 
  curve, 
  and 
  outside 
  of 
  the 
  main 
  coil 
  of 
  the 
  

   stem. 
  Some 
  of 
  the 
  branching 
  cirri 
  are 
  shown, 
  limited 
  to 
  the 
  

   distal 
  region. 
  X 
  f. 
  

   la. 
  The 
  crown 
  of 
  same, 
  further 
  enlarged. 
  X 
  3. 
  

   2. 
  A 
  small 
  specimen, 
  with 
  nearly 
  complete 
  stem 
  extending 
  to 
  near 
  

   the 
  calyx, 
  where 
  the 
  slender 
  neck 
  is 
  broken 
  off 
  outside 
  the 
  

   main 
  coil, 
  as 
  in 
  all 
  specimens 
  except 
  the 
  preceding. 
  It 
  shows 
  

   the 
  great 
  relative 
  size 
  and 
  repeated 
  branching 
  of 
  the 
  cirri, 
  

   which 
  are 
  almost 
  as 
  long 
  as 
  the 
  thickened 
  part 
  of 
  the 
  stem. 
  

   X 
  3. 
  

   3, 
  4. 
  Two 
  specimens 
  with 
  neck 
  similarly 
  broken 
  off, 
  showing 
  the 
  nu- 
  

   merous 
  branching 
  cirri 
  in 
  various 
  positions 
  rising 
  from 
  the 
  

   distal 
  region, 
  enveloping 
  the 
  proximal 
  coil 
  like 
  a 
  fringe. 
  Fig. 
  

   3 
  shows 
  the 
  complete 
  stem, 
  tapering 
  to 
  a 
  point 
  at 
  the 
  distal 
  

   end. 
  X 
  2. 
  

  

  5. 
  A 
  very 
  large 
  specimen 
  seen 
  from 
  outside 
  of 
  curve, 
  showing 
  the 
  

  

  longitudinal 
  sutures, 
  and 
  alternate 
  arrangement 
  of 
  the 
  rounded 
  

   cirri 
  arising 
  from 
  back 
  of 
  stum, 
  and 
  limited 
  to 
  the 
  distal 
  region. 
  

   Columnals 
  of 
  this 
  specimen 
  are 
  6 
  mm. 
  wide 
  at 
  the 
  hack. 
  

  

  6. 
  Distal 
  portion 
  of 
  a 
  broken 
  specimen 
  seen 
  from 
  the 
  inner 
  side 
  of 
  

  

  the 
  curve. 
  

  

  7. 
  Fragment 
  from 
  above 
  the 
  upper 
  limit 
  of 
  cirri, 
  seen 
  from 
  inner 
  

  

  side 
  of 
  curve. 
  X 
  -§. 
  

   S. 
  Transection 
  of 
  stem 
  at 
  about 
  same 
  position 
  as 
  last, 
  showing 
  

  

  form 
  of 
  axial 
  canal. 
  X 
  -§. 
  

   9. 
  Fragment 
  toward 
  the 
  distal 
  end. 
  seen 
  from 
  outer 
  side 
  o£ 
  curve, 
  

  

  shewing 
  origin 
  of 
  cirri 
  ar 
  hack 
  of 
  stem. 
  X 
  -§. 
  

   10. 
  Transverse 
  view 
  of 
  joint-face 
  at 
  about 
  same 
  level, 
  showing 
  the 
  

   relative 
  narrowing 
  and 
  thickening 
  of 
  the 
  stem 
  approaching 
  a 
  

   circular 
  form 
  at 
  the 
  termination. 
  X 
  |. 
  

  

  Niagaran, 
  Rochester 
  shale; 
  Lockport, 
  New 
  York. 
  

  

  L03 
  

  

  