﻿akt9 
  UNUSUAL, 
  FORMS 
  OF 
  FOSSIL 
  CRICOIDS 
  SPRINGER 
  93 
  

  

  instead 
  of 
  the 
  anterior, 
  which 
  together 
  with 
  the 
  absence 
  of 
  a 
  radi- 
  

   anal, 
  differentiates 
  it 
  from 
  the 
  other 
  genera 
  in 
  the 
  group 
  under 
  

   consideration. 
  

  

  Timor 
  ocrinus 
  is 
  by 
  far 
  the 
  most 
  prominent 
  crinoid 
  of 
  the 
  Timor 
  

   fauna, 
  specimens 
  being 
  found 
  by 
  thousands, 
  from 
  which 
  Wanner 
  

   has 
  described 
  11 
  species 
  and 
  5 
  varieties. 
  

  

  THE 
  CRINOID 
  FAUNA 
  OF 
  TIMOR 
  

  

  Professor 
  Wanner's 
  second 
  volume 
  (and 
  also 
  his 
  work 
  on 
  the 
  

   blastoids) 
  has 
  been 
  published, 
  56 
  bringing 
  that 
  wonderful 
  assem- 
  

   blage 
  of 
  unfamiliar 
  forms 
  up 
  to 
  a 
  total 
  of 
  41 
  new 
  crinoid 
  genera 
  

   named, 
  18 
  hitherto 
  known, 
  all 
  but 
  one 
  from 
  other 
  regions, 
  42 
  indi- 
  

   cated 
  by 
  imperfect 
  material 
  but 
  not 
  named; 
  and 
  189 
  species 
  named 
  

   plus 
  about 
  50 
  only 
  indicated. 
  The 
  59 
  named 
  genera 
  are 
  distributed 
  

   as 
  follows: 
  Camerata, 
  6; 
  Flexibilia, 
  10; 
  Cyathocrinidae, 
  14; 
  Poter- 
  

   iocrinidae, 
  25; 
  Larviformia, 
  2; 
  Insertae 
  sedis, 
  2. 
  Of 
  the 
  Camerata, 
  

   the 
  Khodocrinidae 
  and 
  Batocrinidae 
  are 
  unrepresented, 
  and 
  the 
  

   Actinocrinidae, 
  Platycrinidae 
  and 
  Hexacrinidae 
  are 
  present 
  with 
  

   a 
  few 
  species. 
  All 
  the 
  Flexibilia 
  belong 
  to 
  the 
  small 
  and 
  compact 
  

   Lecanocrinidae 
  except 
  a 
  single 
  species, 
  evidenced 
  by 
  one 
  specimen, 
  

   which 
  falls 
  under 
  the 
  Ichthyocrinidae. 
  Including 
  those 
  forms 
  not 
  

   named, 
  but 
  which 
  are 
  all 
  figured 
  and 
  described 
  as 
  far 
  as 
  possible, 
  

   we 
  have 
  a 
  probable 
  aggregate 
  of 
  about 
  100 
  genera 
  and 
  239 
  species. 
  

   Besides 
  these, 
  there 
  are 
  13 
  genera 
  and 
  32 
  species 
  of 
  blastoids, 
  all 
  

   but 
  2 
  genera 
  and 
  2 
  species 
  new, 
  and 
  all 
  belonging 
  to 
  families 
  of 
  

   distinctively 
  Lower 
  Carboniferous 
  age. 
  

  

  A 
  considerable 
  part 
  of 
  the 
  Timor 
  crinoids 
  might 
  be 
  classed 
  

   among 
  the 
  " 
  Unusual 
  Forms," 
  for 
  10 
  of 
  the 
  genera 
  and 
  138 
  species 
  

   are 
  founded 
  upon 
  a 
  single 
  specimen, 
  and 
  many 
  of 
  those 
  which 
  are 
  

   abundant 
  are 
  of 
  types 
  elsewhere 
  wholly 
  unknown. 
  But 
  I 
  am 
  only 
  

   mentioning 
  a 
  few 
  which 
  bear 
  some 
  relation 
  to 
  the 
  forms 
  herein 
  dis- 
  

   cussed. 
  There 
  are 
  some 
  general 
  characteristics 
  of 
  the 
  fauna, 
  however, 
  

   to 
  which 
  a 
  brief 
  allusion 
  may 
  be 
  made. 
  

  

  The 
  predominant 
  element 
  consists 
  of 
  types 
  which 
  point 
  to 
  a 
  life 
  

   in 
  strongly 
  moving 
  water, 
  essentially 
  a 
  reef 
  life, 
  resulting 
  in 
  a 
  num- 
  

   ber 
  of 
  striking 
  modifications 
  and 
  departures 
  from 
  the 
  normal 
  

   structures, 
  shown 
  by 
  the 
  great 
  prevalence 
  of 
  variations, 
  malforma- 
  

   tions, 
  and 
  special 
  adaptions 
  to 
  the 
  environment, 
  such 
  as 
  the 
  slanting 
  

   position 
  of 
  the 
  calyx 
  upon 
  the 
  stem; 
  compact, 
  rounded 
  forms 
  with 
  

   thick 
  calyx 
  plates; 
  short, 
  simple, 
  infolding 
  arms, 
  many 
  of 
  them 
  

   fitting 
  snugly 
  into 
  furrows 
  as 
  a 
  means 
  of 
  protection. 
  The 
  highly 
  

   organized, 
  complex 
  forms 
  with 
  long, 
  pliant 
  stems 
  and 
  delicately 
  

  

  B«Die 
  Permischen 
  Krinoiden 
  von 
  Tiiror, 
  pt. 
  2, 
  1924, 
  348 
  pp., 
  22 
  plates. 
  The 
  Hague. 
  

   Die 
  Permischen 
  Blastoiden 
  von 
  Timor, 
  1024. 
  The 
  Hague. 
  

  

  