﻿THE 
  " 
  WEISSER 
  JURA" 
  OE 
  BAVARIA. 
  171 
  

  

  Fig. 
  17. 
  Allagecrinus 
  Austini, 
  E. 
  & 
  C. 
  : 
  " 
  calyx 
  of 
  a 
  specimen 
  in 
  which 
  three 
  

   radials 
  have 
  distinct 
  articular 
  facet3, 
  whilst 
  another 
  has 
  no 
  facet, 
  

   even 
  of 
  the 
  simplest 
  kind, 
  and 
  there 
  is 
  only 
  an 
  imperfect 
  one 
  on 
  

   the 
  fifth. 
  Howood, 
  near 
  Johnstone." 
  Ventral 
  aspect. 
  x24diain. 
  

   After 
  Etheridge 
  and 
  Carpenter, 
  Ann. 
  & 
  Mag. 
  Nat. 
  Hist. 
  ser. 
  5, 
  

   vol. 
  vii. 
  pi. 
  xvi. 
  f. 
  9, 
  b. 
  

  

  Fig. 
  18. 
  A. 
  Austini. 
  Same 
  specimen 
  as 
  in 
  fig. 
  17, 
  seen 
  from 
  side. 
  After 
  E. 
  

   and 
  0. 
  1. 
  c. 
  pi. 
  xvi. 
  f. 
  9, 
  a. 
  

  

  Fig. 
  19. 
  Haplocrinus 
  mespiliformis, 
  Goldf., 
  sp., 
  from 
  right 
  anterior 
  ray; 
  for 
  

   comparison 
  of 
  articular 
  face 
  with 
  that 
  of 
  Eugeniacrinidae. 
  An 
  arm- 
  

   joint 
  is 
  seen 
  in 
  situ 
  on 
  the 
  right-hand 
  side 
  of 
  the 
  figure. 
  Stringo- 
  

   cephalen-kalk, 
  Gerolstein. 
  Brit. 
  Mus. 
  [49136]. 
  

  

  Figs. 
  1, 
  1 
  a, 
  2, 
  2 
  a, 
  5, 
  7, 
  and 
  19 
  are 
  from 
  my 
  drawings 
  ad 
  naturam. 
  Figs. 
  3, 
  

   4, 
  and 
  6 
  were 
  drawn, 
  with 
  help 
  of 
  sketches, 
  from 
  the 
  specimens 
  by 
  Mr. 
  

   M. 
  Prendergast 
  Parker, 
  to 
  whose 
  skill 
  and 
  accuracy 
  I 
  am 
  much 
  indebted. 
  

   Figs. 
  8-18 
  are 
  copied 
  from 
  the 
  authorities 
  cited, 
  with 
  occasional 
  alteration 
  

   in 
  the 
  direction 
  of 
  clearness. 
  

  

  Discussion 
  - 
  . 
  

  

  The 
  President 
  welcomed 
  a 
  new 
  palaeontologist 
  to 
  the 
  Society. 
  

  

  Dr. 
  P. 
  Herbert 
  Carpenter 
  accepted 
  without 
  hesitation 
  the 
  

   Author's 
  reference 
  of 
  this 
  form 
  to 
  a 
  new 
  genus, 
  and 
  assigned 
  it 
  to 
  

   the 
  same 
  systematic 
  position 
  as 
  did 
  the 
  Author. 
  

  

  He 
  considered 
  his 
  view 
  respecting 
  the 
  basals 
  of 
  Eugeniacrinus 
  to 
  

   be 
  strengthened 
  by 
  what 
  he 
  had 
  heard, 
  and 
  hoped 
  soon 
  to 
  be 
  able 
  

   to 
  test 
  it 
  by 
  the 
  examination 
  of 
  sufficiently 
  well-preserved 
  material. 
  

  

  The 
  way 
  in 
  which 
  one 
  basal 
  of 
  Trigonocrinus 
  is 
  crowded 
  out 
  is 
  

   peculiar. 
  The 
  arms 
  must 
  have 
  been 
  extremely 
  reduced, 
  and 
  were 
  

   perhaps 
  attached 
  by 
  suture 
  rather 
  than 
  by 
  articulation. 
  In 
  dis- 
  

   cussing 
  symmetry 
  the 
  Author 
  appeared 
  to 
  have 
  treated 
  the 
  Crinoids 
  

   too 
  much 
  as 
  an 
  isolated 
  group, 
  and 
  not 
  as 
  having 
  the 
  general 
  

   structure 
  of 
  Echinoderms. 
  

  

  Prof. 
  Seeley 
  asked 
  whether 
  it 
  was 
  certain 
  that 
  the 
  specimens 
  

   were 
  mature 
  forms, 
  and 
  whether 
  it 
  was 
  safe 
  to 
  found 
  a 
  new 
  genus 
  

   on 
  such 
  limited 
  material. 
  He 
  did 
  not 
  see 
  the 
  necessity 
  for 
  sup- 
  

   posing 
  atrophy 
  and 
  fusion 
  following 
  sport. 
  The 
  form, 
  though 
  

   extremely 
  exceptional, 
  need 
  not 
  be 
  permanent. 
  

  

  The 
  Author 
  replied 
  to 
  Dr. 
  Carpenter 
  that 
  the 
  question 
  regarding 
  

   the 
  basals 
  was 
  one 
  of 
  the 
  weight 
  of 
  evidence. 
  With 
  reference 
  to 
  

   the 
  attachment 
  of 
  the 
  arms, 
  the 
  marks 
  of 
  articulation, 
  although 
  

   almost, 
  are 
  not 
  quite 
  invisible. 
  As 
  an 
  instance 
  of 
  atrophy, 
  he 
  

   mentioned 
  the 
  radials 
  of 
  Triacrinus. 
  Similar 
  asymmetry 
  occurs 
  

   in 
  the 
  other 
  classes 
  of 
  Echinodermata 
  ; 
  instances 
  among 
  Echinoidea 
  

   led 
  Haacke 
  to 
  the 
  same 
  conclusions. 
  Everything 
  went 
  to 
  prove 
  the 
  

   maturity 
  of 
  the 
  forms 
  which 
  he 
  had 
  described. 
  

  

  