﻿32 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  locality. 
  Many 
  of 
  the 
  specimens 
  from 
  both 
  localities 
  are 
  beauti- 
  

   fully 
  preserved, 
  having 
  the 
  stem 
  to 
  its 
  full 
  length, 
  with 
  the 
  crown 
  

   plainly 
  showing 
  through 
  the 
  thin 
  fringe 
  of 
  delicate 
  cirri, 
  and 
  some- 
  

   times 
  completely 
  isolated. 
  The 
  multiple 
  arrangement 
  of 
  the 
  cirri 
  on 
  

   alternating 
  pairs 
  of 
  columnals 
  is 
  constant 
  throughout 
  all 
  this 
  ma- 
  

   terial, 
  except 
  that 
  in 
  some 
  specimens 
  near 
  the 
  distal 
  end 
  the 
  col- 
  

   umnals 
  tend 
  to 
  become 
  more 
  nearly 
  equal 
  in 
  length, 
  and 
  the 
  inter- 
  

   vals 
  between 
  the 
  cirri 
  somewhat 
  longer. 
  I 
  am 
  figuring 
  characteristic 
  

   specimens 
  from 
  each 
  of 
  the 
  localities. 
  In 
  none 
  of 
  them 
  is 
  there 
  such 
  

   a 
  close, 
  compact 
  coil 
  in 
  the 
  proximal 
  region 
  as 
  occurs 
  in 
  C. 
  myelo- 
  

   dactylus. 
  15 
  

  

  Horizon 
  and 
  locality. 
  — 
  Mississippian, 
  lower 
  part 
  of 
  Chester, 
  

   Ohara 
  and 
  Renault 
  formations; 
  Huntsville, 
  Alabama 
  and 
  Burks- 
  

   ville, 
  Monroe 
  County, 
  Illinois. 
  

  

  CAMPTOCRINUS 
  CIRRIFER 
  Wachsmuth 
  and 
  Springer 
  

  

  Plate 
  8, 
  figs. 
  10, 
  Wa 
  

  

  Camptocrlnus 
  cirrifer 
  Wachsmuth 
  and 
  Springer, 
  North 
  American 
  Crin- 
  

   oidea, 
  Camerata, 
  1S97, 
  p. 
  7S0, 
  pi. 
  76, 
  figs. 
  13a, 
  & 
  (not 
  13c). 
  

  

  Like 
  C. 
  7?iulticirrus, 
  except 
  that 
  the 
  cirri 
  are 
  more 
  attenuate, 
  and 
  

   there 
  is 
  a 
  tendency 
  of 
  the 
  pairs 
  of 
  short 
  columnals 
  bearing 
  the 
  mul- 
  

   tiple 
  cirri 
  to 
  coalesce 
  so 
  as 
  to 
  resemble 
  a 
  single 
  ossicle; 
  also 
  in 
  some 
  

   specimens 
  the 
  rudimentary 
  cirri 
  toward 
  the 
  distal 
  end 
  tend 
  to 
  form 
  

   rather 
  well 
  defined 
  whorls 
  associated 
  with 
  a 
  more 
  rounded 
  stem, 
  

   which 
  may 
  well 
  mark 
  the 
  end 
  of 
  the 
  specialization 
  by 
  which 
  this 
  

   whole 
  type 
  is 
  characterized. 
  

  

  This 
  species 
  occurs 
  in 
  the 
  upper 
  part 
  of 
  the 
  Chester, 
  the 
  Glen 
  Dean 
  

   formation, 
  the 
  fauna 
  of 
  which 
  is 
  sharply 
  distinguished 
  from 
  that 
  

   of 
  the 
  preceding 
  species. 
  The 
  differences 
  from 
  that 
  species 
  are 
  very 
  

   slight, 
  and 
  if 
  the 
  two 
  occurred 
  in 
  the 
  same 
  formation 
  might 
  well 
  

   be 
  disregarded. 
  But 
  in 
  view 
  of 
  the 
  changes 
  which 
  took 
  place 
  in 
  

   other 
  genera 
  of 
  the 
  echinoderms 
  during 
  the 
  considerable 
  time 
  inter- 
  

   val 
  between 
  the 
  respective 
  formations, 
  it 
  seems 
  best 
  to 
  recognize 
  

  

  18 
  Camptocrlnus 
  indoaustr 
  aliens 
  Wanner. 
  

  

  Die 
  Permischen 
  Krinoiden 
  von 
  Timor, 
  vol. 
  2, 
  1924, 
  p. 
  81, 
  pi. 
  3, 
  figs. 
  9-11. 
  This 
  species, 
  

   the 
  description 
  of 
  which 
  appeared 
  subsequent 
  to 
  the 
  preparation 
  of 
  the 
  text 
  hereof, 
  adds 
  

   another 
  to 
  the 
  strictly 
  Lower 
  Carboniferous 
  types 
  which 
  have 
  been 
  found 
  associated 
  with 
  

   the 
  remarkable 
  Permian 
  fauna 
  of 
  the 
  East 
  Indies. 
  The 
  author 
  notes 
  its 
  great 
  similarity 
  

   to 
  C. 
  cirrifer, 
  from 
  which 
  he 
  says 
  a 
  separation 
  is 
  scarcely 
  possible 
  by 
  the 
  characters 
  of 
  

   the 
  calyx 
  and 
  arms, 
  but 
  he 
  thinks 
  the 
  structure 
  of 
  the 
  stem 
  offers 
  sufficient 
  differences 
  to 
  

   justify 
  a 
  new 
  species. 
  But 
  the 
  similarity 
  is 
  even 
  greater 
  than 
  he 
  thought, 
  when 
  compari- 
  

   son 
  is 
  made 
  with 
  the 
  form 
  of 
  C. 
  cirrifer 
  now 
  separated 
  under 
  C. 
  mulMdrrus. 
  For 
  the 
  

   stem 
  character 
  upon 
  which 
  he 
  mainly 
  relies, 
  namely, 
  two 
  short 
  ossicles 
  alternating 
  with 
  

   one 
  longer, 
  is 
  most 
  conspicuous 
  in 
  our 
  species 
  ; 
  and 
  the 
  " 
  small 
  knots 
  " 
  which 
  he 
  mentions 
  

   as 
  occurring 
  along 
  the 
  suture 
  line 
  between 
  the 
  short 
  pair 
  are 
  the 
  remains 
  of 
  budding 
  

   cirri 
  as 
  above 
  described. 
  

  

  