﻿THE 
  " 
  WEISSER 
  JUKA 
  " 
  OF 
  BAVARIA. 
  153 
  

  

  find 
  but 
  the 
  minutest 
  trace 
  of 
  muscle-attachment, 
  no 
  true 
  articular 
  

   surface, 
  and 
  no 
  canal-aperture 
  (PI. 
  VI. 
  fig. 
  5). 
  

  

  In 
  the 
  above 
  accidental 
  characters 
  alone 
  does 
  this 
  specimen 
  differ 
  

   from 
  the 
  former. 
  There 
  can 
  be 
  no 
  doubt 
  that 
  the 
  two 
  belong 
  to 
  

   the 
  same 
  genus 
  and 
  to 
  the 
  same 
  species. 
  

  

  Validity 
  or 
  the 
  Gestus. 
  

  

  It 
  is 
  hardly 
  necessary 
  to 
  point 
  out 
  that 
  the 
  existence 
  of 
  two 
  indi- 
  

   viduals, 
  and 
  those 
  so 
  nearly 
  alike, 
  almost 
  entirely 
  quashes 
  the 
  

   supposition 
  that 
  we 
  have 
  to 
  deal 
  with 
  a 
  mere 
  abnormality. 
  And 
  it 
  

   is 
  in 
  any 
  case 
  difficult 
  to 
  see 
  of 
  what 
  known 
  form 
  this 
  could 
  be 
  an 
  

   abnormal 
  variety. 
  In 
  all 
  our 
  collection 
  there 
  is 
  nothing 
  else 
  

   like 
  it 
  ; 
  in 
  existing 
  crinoid 
  literature 
  I 
  am 
  unacquainted 
  with 
  any- 
  

   thing 
  of 
  similar 
  nature 
  *. 
  My 
  ignorance, 
  it 
  is 
  true, 
  would 
  prove 
  

   little 
  were 
  it 
  not 
  shared 
  by 
  our 
  greatest 
  authority 
  on 
  the 
  Crinoidea, 
  

   Dr. 
  P. 
  H. 
  Carpenter. 
  Further, 
  I 
  have 
  recently 
  worked 
  through 
  

   every 
  crinoidal 
  fragment 
  in 
  the 
  Museums 
  of 
  Strassburg, 
  Freiburg 
  i/B., 
  

   Stuttgart, 
  Tubingen, 
  Donaueschingen, 
  Schaffhausen, 
  and 
  Basle, 
  also 
  

   in 
  the 
  private 
  collections 
  of 
  Herr 
  E. 
  Koch 
  (Stuttgart), 
  Dr. 
  Schalch 
  

   (Schaffhausen), 
  Mons. 
  E. 
  Greppin 
  (Basle), 
  Mons. 
  V. 
  Gillieron 
  (Basle), 
  

   also 
  in 
  the 
  collection 
  Cartier 
  (Basle 
  Museum), 
  and 
  the 
  collection 
  

   Greppin, 
  pere 
  (Strassburg 
  Museum) 
  ; 
  in 
  all 
  these 
  there 
  is 
  not 
  a 
  single 
  

   specimen 
  of 
  the 
  same 
  or 
  of 
  similar 
  nature. 
  Perhaps 
  I 
  may 
  be 
  allowed 
  

   this 
  opportunity 
  of 
  expressing 
  to 
  these 
  gentlemen, 
  and 
  to 
  those 
  con- 
  

   nected 
  with 
  the 
  above-mentioned 
  public 
  institutions, 
  my 
  most 
  

   hearty 
  thanks 
  for 
  the 
  kindness 
  they, 
  without 
  exception, 
  showed 
  to 
  

   me, 
  and 
  for 
  the 
  facilities 
  that 
  all 
  afforded 
  me 
  in 
  my 
  work. 
  

  

  We 
  must 
  therefore 
  conclude 
  that 
  this 
  unique 
  form 
  is 
  sui 
  generis 
  ; 
  

   but, 
  before 
  giving 
  a 
  diagnosis, 
  it 
  will 
  be 
  advisable 
  to 
  compare 
  it 
  

   with 
  other 
  crinoids. 
  

  

  Systematic 
  Position. 
  

  

  The 
  general 
  resemblance 
  of 
  this 
  new 
  genus 
  to 
  some 
  Eugeniacrinida? 
  

   is 
  obvious, 
  although 
  it 
  by 
  no 
  means 
  presents 
  the 
  characters 
  of 
  that 
  

   family 
  as 
  defined 
  by 
  Prof. 
  K. 
  v. 
  Zittelf 
  and 
  by 
  Mons. 
  P. 
  de 
  Lorioft. 
  

   The 
  latter 
  writes 
  : 
  — 
  " 
  The 
  crinoids 
  constituting 
  this 
  family 
  are 
  com- 
  

   posed 
  of 
  a 
  calyx 
  supported 
  by 
  a 
  stem 
  that 
  is 
  fixed 
  by 
  a 
  root 
  to 
  sub- 
  

  

  * 
  E. 
  F. 
  von 
  Schlotheira, 
  in 
  ' 
  ISTachtrage 
  zur 
  Petrefacten- 
  

   kunde,' 
  2 
  Abth. 
  (Grotha, 
  1823), 
  p. 
  102, 
  mentions 
  a 
  Eugeniacrinid 
  

   " 
  calyx 
  of 
  somewhat 
  altered 
  form, 
  which 
  occurs, 
  though 
  very 
  

   rarely, 
  in 
  the 
  neighbourhood 
  of 
  Amberg." 
  This 
  is 
  figured 
  in 
  

   the 
  Atlas 
  ' 
  Versteinerungen 
  aus 
  v. 
  Sehl.'s 
  Sammlung,' 
  pi. 
  xxviii. 
  

   fig. 
  6 
  g, 
  and 
  a 
  facsimile 
  is 
  annexed. 
  It 
  appears 
  to 
  have 
  had 
  4 
  R, 
  

   with 
  three 
  large 
  spines 
  and 
  one 
  smaller 
  one. 
  In 
  other 
  points 
  

   it 
  is 
  not 
  like 
  our 
  specimens 
  ; 
  but, 
  as 
  it 
  probably 
  came 
  from 
  the 
  " 
  Brauner 
  Jura," 
  

   it 
  may 
  be 
  a 
  transition 
  form, 
  as 
  in 
  fig. 
  2, 
  III, 
  p. 
  165. 
  

  

  t 
  Handbuch 
  der 
  Palaontologie, 
  Palaozool. 
  I. 
  i. 
  p. 
  384 
  (Miinchen, 
  1880). 
  

  

  % 
  Paleont. 
  Fran^aise 
  ; 
  Invertebres 
  ; 
  Terrain 
  Jurassique, 
  xi. 
  lere 
  partie, 
  Cri- 
  

   noides, 
  pp. 
  74-5 
  (Paris, 
  1882). 
  

  

  