﻿Plate 
  G 
  

  

  All 
  figures 
  not 
  otherwise 
  noted 
  natural 
  size 
  

  

  Pagi 
  

   MYELODACTYLUS 
  KEYSERENSIS. 
  new 
  Species 
  10 
  

  

  Fig. 
  1. 
  A 
  nearly 
  complete 
  specimen, 
  Lacking 
  only 
  the 
  distal 
  pari 
  of 
  

   the 
  stem; 
  crown 
  fully 
  exposed 
  on 
  both 
  sides 
  by 
  removal 
  of 
  

   cirri. 
  Seen 
  from 
  the 
  many 
  branched 
  anterior 
  radius, 
  with 
  

   the 
  unbranched 
  righl 
  anterior 
  radius 
  to 
  the 
  left 
  of 
  it. 
  The 
  

   proximal 
  neck 
  and 
  reverse 
  curve 
  arc 
  in 
  full 
  view, 
  and 
  a 
  few- 
  

   cirri 
  are 
  in 
  place 
  distahvards. 
  one 
  to 
  each 
  columnal. 
  

  

  la. 
  Reverse 
  side 
  of 
  same, 
  left 
  posterior 
  view, 
  showing 
  the 
  same 
  

   structures; 
  cirri 
  exposed 
  opposite 
  some 
  of 
  those 
  seen 
  in 
  the 
  

   preceding 
  figure, 
  proving 
  their 
  paired 
  arrangement 
  on 
  suc- 
  

   ceeding 
  columnals. 
  The 
  crescentic 
  stem 
  toward 
  the 
  ends 
  of 
  

   the 
  arms 
  is 
  4.."> 
  mm. 
  wide, 
  while 
  the 
  mass 
  of 
  arms 
  is 
  swollen 
  

   beyond 
  it 
  at 
  either 
  side 
  until 
  it 
  is 
  VJ. 
  mm. 
  thick, 
  measured 
  

   vertical 
  to 
  the 
  plane 
  of 
  these 
  figures. 
  

  

  lb. 
  Calyx 
  and 
  lower 
  part 
  of 
  arms 
  of 
  same 
  specimen, 
  from 
  left 
  

   anterior 
  radius. 
  X 
  2. 
  

  

  lc. 
  Analysis 
  of 
  the 
  crown, 
  showing 
  the 
  presence 
  of 
  five 
  radii, 
  no 
  

   two 
  alike; 
  r. 
  post, 
  radius 
  ai 
  the 
  right 
  with 
  anal 
  tube 
  resting 
  

   on 
  the 
  left 
  sloping 
  face 
  of 
  the 
  superior 
  half 
  of 
  the 
  radial; 
  r. 
  

   ant. 
  radius 
  at 
  the 
  left, 
  unbranched; 
  the 
  others 
  branching 
  at 
  

   different 
  heights. 
  General 
  arrangement 
  similar 
  to 
  that 
  of 
  

   Tocrinus. 
  

  

  2. 
  Another 
  specimen 
  closely 
  inrolled, 
  with 
  crown 
  completely 
  en- 
  

  

  veloped 
  by 
  the 
  long, 
  slender, 
  cirri 
  converging 
  at 
  the 
  center; 
  

   swollen 
  to 
  a 
  thickness 
  of 
  8.5 
  mm. 
  

  

  3. 
  A 
  specimen 
  showing 
  the 
  great 
  swelling 
  of 
  the 
  crown 
  at 
  the 
  

  

  distal 
  region, 
  as 
  it 
  lies 
  enveloped 
  in 
  the 
  cirri; 
  it 
  is 
  here 
  15 
  

   mm. 
  in 
  thickness. 
  Seen 
  from 
  outer 
  curve 
  of 
  stem. 
  

  

  Lower 
  Devonian, 
  Keyser 
  formation; 
  Keyser, 
  West 
  Virginia. 
  

  

  AMMONICRINUS 
  WANNERI, 
  new 
  species 
  22 
  

  

  Flo. 
  4. 
  A 
  small 
  specimen, 
  tightly 
  inrolled, 
  seen 
  from 
  the 
  side, 
  show- 
  

   ing 
  the 
  large 
  columnals, 
  tapering 
  to 
  a 
  point 
  at 
  the 
  distal 
  

   end. 
  with 
  strong, 
  apparently 
  non-articulated 
  processes 
  con- 
  

   verging 
  toward 
  the 
  center, 
  in 
  the 
  position 
  of 
  cirri. 
  X 
  •§. 
  

  

  4u. 
  The 
  same, 
  seen 
  from 
  the 
  reverse 
  side. 
  X 
  4. 
  

  

  4l>. 
  The 
  same, 
  seen 
  from 
  outer 
  side 
  of 
  curve, 
  showing 
  the 
  deep 
  

   bevelinu 
  of 
  the 
  columnals, 
  their 
  great 
  widtli 
  and 
  rapid 
  taper 
  

   t<> 
  distal 
  end. 
  X 
  f. 
  

   5. 
  The 
  larger 
  specimen; 
  lateral 
  view 
  showing 
  the 
  cirrus-like, 
  but 
  

   unarticulated, 
  processes 
  converging 
  at 
  the 
  center 
  in 
  irreg- 
  

   ular 
  forms. 
  Note 
  perforation 
  at 
  the 
  fractured 
  distal 
  end 
  

   for 
  the 
  axial 
  canal. 
  X 
  \. 
  

  

  105 
  

  

  