﻿47 
  

  

  NOTE 
  ON 
  THE 
  CAEBONIFEROUS 
  GONIATITE 
  GLYPHIOCERAS 
  

   VESICULIFERUM, 
  DE 
  KONINCK 
  SP. 
  

  

  By 
  G. 
  C. 
  Crick, 
  F.G.S., 
  F.Z.S., 
  of 
  the 
  Erltish 
  [Museum 
  

   (jS'atural 
  History). 
  

  

  [Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.] 
  

  

  Eead 
  IMli 
  January, 
  1916. 
  

  

  In 
  1910, 
  in 
  the 
  Proceedings 
  of 
  the 
  Yorkshire 
  Geological 
  Society, 
  

   Dr. 
  Wheelton 
  Hind 
  described 
  and 
  figured 
  (vol. 
  xvii, 
  part 
  2, 
  p]). 
  106, 
  

   107; 
  pi. 
  vi, 
  figs. 
  2, 
  2a, 
  2h), 
  from 
  the 
  "Carboniferous 
  Limestone 
  of 
  

   Elbolton, 
  near 
  Cracoe, 
  Yorkshire 
  (Upper 
  Dibunophyllum 
  zone)", 
  

   the 
  only 
  example 
  of 
  De 
  Koninck's 
  Goniatites 
  resiculifer 
  which 
  he 
  had 
  

   found 
  during 
  his 
  many 
  years' 
  work 
  on 
  the 
  Carboniferous 
  Limestone 
  of 
  

   Great 
  Britain 
  and 
  Ireland. 
  The 
  difPerences, 
  however, 
  between 
  liis 
  

   description 
  and 
  that 
  of 
  l)e 
  Koninck 
  were 
  so 
  great 
  that 
  I 
  wrote 
  ta 
  

   Dr. 
  Hind 
  expressing 
  a 
  wish 
  to 
  see 
  the 
  specimen. 
  He 
  very 
  kindly 
  

   granted 
  my 
  request, 
  and 
  my 
  best 
  thanks 
  are 
  due 
  to 
  him 
  for 
  the 
  loan 
  

   of 
  the 
  fossil. 
  

  

  The 
  specimen 
  is 
  very 
  well 
  represented 
  in 
  Dr. 
  Hind's 
  figures 
  2 
  

   and 
  2a. 
  

  

  In 
  his 
  description 
  ' 
  of 
  the 
  species 
  De 
  Koninck 
  clearly 
  states 
  - 
  that 
  it 
  

   was 
  Avhen 
  the 
  shell 
  had 
  lost 
  its 
  last 
  whorl 
  that 
  on 
  each 
  side 
  of 
  the 
  

   peripheral 
  area 
  could 
  be 
  seen 
  a 
  longitudinal 
  vesicular 
  band 
  which 
  was 
  

   formed 
  during 
  the 
  growth 
  of 
  the 
  animal. 
  These 
  bands 
  are 
  raised 
  and 
  

   attain 
  a 
  relatively 
  considerable 
  size,^ 
  forming 
  a 
  very 
  prominent 
  feature 
  

   in 
  a 
  specimen 
  which 
  has 
  lost 
  its 
  body-chamber. 
  They 
  are 
  apparent 
  

   on 
  the 
  floor 
  of 
  the 
  body-chamber, 
  and 
  have 
  tlieir 
  greatest 
  height 
  at 
  

   the 
  base 
  of 
  the 
  body-chamber, 
  their 
  height 
  gradually 
  decreasing 
  

   towards 
  the 
  aperture 
  of 
  the 
  shell; 
  they 
  seem 
  to 
  be 
  of 
  a 
  vesicular 
  

   character, 
  their 
  surface 
  having 
  a 
  reticulated 
  appearance. 
  They 
  

   evidently 
  existed 
  from 
  an 
  early 
  stage, 
  and 
  since 
  they 
  were 
  not 
  

   absorbed 
  during 
  the 
  growth 
  of 
  the 
  animal, 
  as 
  the 
  animal 
  grew 
  forward 
  

   in 
  its 
  shell 
  and 
  formed 
  new 
  septa, 
  the 
  dorsal 
  (inner) 
  edge 
  of 
  each 
  

   septum 
  necessarily 
  crossed 
  these 
  bands. 
  When 
  therefore 
  the 
  oiiter 
  

   whorl 
  (including 
  not 
  only 
  the 
  body-chamber 
  but 
  some 
  of 
  the 
  septate 
  

   part 
  of 
  the 
  shell) 
  is 
  removed, 
  leaving 
  its 
  floor 
  attached 
  to 
  the 
  preceding 
  

   whorl, 
  these 
  longitudinal 
  bands 
  are 
  seen 
  to 
  be 
  crossed 
  by 
  the 
  adherent 
  

  

  ^ 
  L. 
  G. 
  de 
  Koninck, 
  Ann. 
  Mus. 
  Roy. 
  Hist. 
  Nat. 
  Belgique, 
  Ser. 
  Paleont., 
  torn, 
  v 
  

   (Faune 
  du 
  calc. 
  carb. 
  Belgique, 
  pt. 
  ii), 
  1880, 
  p. 
  109, 
  pi. 
  xlix, 
  figs. 
  10, 
  11. 
  

  

  ^ 
  His 
  actual 
  words 
  are 
  : 
  " 
  Lorsque 
  la 
  coquille 
  a 
  perdu 
  son 
  dernier 
  tour 
  de 
  spire, 
  

   on 
  aperpoit 
  sur 
  chacun 
  de 
  ses 
  cotes 
  une 
  bande 
  longitudinale 
  saillante 
  

   composee 
  d'une 
  innombrable 
  quantite 
  de 
  petites 
  vesicules, 
  qui 
  s'est 
  formee 
  

   pendant 
  le 
  developpement 
  de 
  I'animal 
  ; 
  ce 
  depot 
  donne 
  a 
  la 
  section 
  de 
  la 
  

   spire 
  une 
  forme 
  particuliere 
  que 
  je 
  n'ai 
  rencontre 
  chez 
  aucune 
  autre 
  espece 
  

   de 
  Goniatites.^' 
  

  

  ^ 
  Being 
  between 
  4 
  and 
  5 
  mm. 
  wide 
  and 
  about 
  2 
  mm. 
  high 
  where 
  the 
  diameter 
  

   of 
  the 
  shell 
  is 
  about 
  20 
  mm. 
  

  

  