﻿British 
  Fossil 
  Crinoids. 
  2J:9 
  

  

  figure 
  (fig. 
  4) 
  is 
  drawn 
  as 
  pierced 
  by 
  a 
  small 
  pore, 
  considered 
  

   by 
  Austin 
  as 
  an 
  anal 
  pore, 
  but 
  much 
  smaller 
  in 
  proportion 
  

   than 
  the 
  usual 
  anal 
  channel 
  of 
  a 
  pelmatozoon. 
  Although 
  

   no 
  statement 
  is 
  made 
  and 
  no 
  representation 
  of 
  the 
  actual 
  

   size 
  is 
  given, 
  still 
  it 
  seems 
  probable 
  that 
  these 
  figures 
  agree 
  

   with 
  those 
  of 
  the 
  other 
  species 
  in 
  being 
  enlarged 
  some 
  three 
  

   or 
  four 
  diameters. 
  

  

  Comparison 
  of 
  the 
  figures 
  with 
  those 
  of 
  the 
  Visean 
  species 
  

   Layeniocrinus 
  seminulum, 
  De 
  Koninek 
  andLehou 
  (1884, 
  'Re- 
  

   cherches 
  s. 
  1. 
  Criu./ 
  p. 
  187, 
  pi. 
  vii. 
  ft". 
  1 
  a, 
  b, 
  c), 
  will 
  confirm 
  

   my 
  previous 
  reference 
  of 
  the 
  drawings 
  of 
  this 
  species 
  to 
  

   Lageniocrinus. 
  If, 
  however, 
  that 
  be 
  correct, 
  then 
  the 
  sup- 
  

   posed 
  anus 
  is 
  probably 
  a 
  parasitic 
  boring 
  or 
  some 
  adherent 
  

   foreign 
  body. 
  

  

  Lageniocrinus 
  is, 
  as 
  I 
  have 
  suggested 
  (1900, 
  ' 
  Treatise/ 
  

   p. 
  152), 
  probably 
  the 
  young 
  of 
  Symbathocrinus. 
  The 
  live 
  

   triangular 
  plates 
  are 
  the 
  first 
  stages 
  of 
  the 
  arms, 
  and 
  sub- 
  

   sequent 
  brachials 
  would 
  appear 
  at 
  their 
  distal 
  ends. 
  This 
  

   is 
  borne 
  out 
  by 
  Austiu^s 
  fig. 
  4 
  a, 
  which 
  shows 
  a 
  slight 
  

   excavation 
  at 
  the 
  apices, 
  with 
  apparently 
  a 
  minute 
  pore 
  in 
  

   each. 
  These 
  may 
  be 
  interpreted 
  as 
  the 
  facets 
  for 
  the 
  second 
  

   brachials, 
  with 
  the 
  opening 
  of 
  the 
  ventral 
  groove. 
  

  

  Sycocrinus 
  clausus. 
  

  

  This 
  is 
  not 
  represented 
  in 
  the 
  Austin 
  Collection, 
  so 
  that 
  

   the 
  locality 
  and 
  horizon 
  are 
  still 
  a 
  little 
  uncertain 
  {vide 
  

   supra), 
  and 
  our 
  information 
  is 
  confined 
  to 
  the 
  published 
  

   definition 
  already 
  analysed 
  and 
  the 
  MS. 
  drawings 
  reproduced 
  

   in 
  PI. 
  X. 
  figs. 
  3-3 
  e. 
  

  

  The 
  figures 
  are 
  clear 
  in 
  all 
  respects 
  except 
  the 
  orientation 
  

   of 
  the 
  small 
  infrabasal, 
  a 
  very 
  important 
  point. 
  They 
  are 
  

   consistent 
  with 
  its 
  position 
  either 
  in 
  the 
  r. 
  post, 
  radius, 
  as 
  

   in 
  Flexibilia, 
  or 
  in 
  the 
  anterior 
  radius, 
  as 
  in 
  Dicyclica 
  

   luadunata. 
  

  

  The 
  five 
  summit-plates, 
  with 
  their 
  tri-radiate 
  central 
  

   suture 
  (Hg. 
  3</), 
  are 
  of 
  the 
  type 
  usually 
  termed 
  ''orals,'^ 
  

   and 
  there 
  are 
  no 
  traces 
  of 
  any 
  arm-facets 
  on 
  the 
  radials. 
  

   It 
  will, 
  however, 
  be 
  noted 
  that 
  the 
  specimen 
  itself 
  was 
  very 
  

   small, 
  and 
  the 
  facets 
  might 
  easily 
  have 
  escaped 
  observation. 
  

  

  In 
  the 
  absence 
  of 
  the 
  actual 
  specimen, 
  I 
  do 
  not 
  feel 
  inclined 
  

   to 
  speculate 
  as 
  to 
  the 
  precise 
  position 
  of 
  this 
  form. 
  It 
  may, 
  

   not 
  improbably, 
  have 
  been 
  a 
  Gasterocomid 
  allied 
  to 
  Hypo- 
  

   crinus 
  schneideri 
  and 
  " 
  Lccythiucrinus" 
  adamsi, 
  if 
  not 
  

   actually 
  congeneric 
  with 
  one 
  or 
  other 
  of 
  them 
  ; 
  or 
  it 
  may 
  

   conceivably 
  have 
  been, 
  as 
  Austin 
  supposed, 
  congeneric 
  with 
  

  

  