﻿P. 
  G. 
  H. 
  PRICE 
  ON 
  THE 
  GAULT 
  OP 
  FOLKESTONE. 
  355 
  

  

  and 
  others 
  from 
  fragments, 
  and 
  the 
  specimens 
  procured 
  from 
  Folke- 
  

   stone 
  are 
  frequently 
  quite 
  perfect; 
  thus 
  any 
  one 
  undertaking 
  the 
  

   task 
  of 
  producing 
  a 
  monograph 
  upon 
  this 
  genus 
  would 
  have 
  fewer 
  

   difficulties 
  to 
  contend 
  with 
  than 
  those 
  authors 
  who 
  have 
  already 
  

   described 
  them 
  from 
  imperfect 
  data. 
  

  

  On 
  some 
  New 
  Species 
  of 
  Gault 
  fossils. 
  

  

  The 
  first 
  species 
  I 
  have 
  to 
  describe 
  is 
  well 
  known 
  to 
  collectors 
  of 
  

   Gault 
  fossils, 
  and 
  has 
  been, 
  if 
  I 
  mistake 
  not, 
  erroneously 
  considered 
  

   Ringinella 
  lacryma, 
  D'Orb. 
  Pal. 
  Fr. 
  pi. 
  167. 
  figs. 
  21-23, 
  which 
  species 
  

   is 
  never 
  found 
  in 
  this 
  country. 
  Upon 
  close 
  examination 
  and 
  com- 
  

   parison 
  with 
  the 
  figures 
  of 
  R. 
  lacryma, 
  D'Orb., 
  and 
  of 
  Avellana 
  

   lacryma, 
  in 
  Pictet 
  et 
  Campiche, 
  Pal. 
  Suisse, 
  Environs 
  de 
  Sainte- 
  

   Croix, 
  p. 
  198, 
  2nd 
  part, 
  it 
  does 
  not 
  agree, 
  inasmuch 
  as 
  the 
  speci- 
  

   mens 
  I 
  have 
  had 
  to 
  refer 
  to 
  in 
  the 
  collection 
  of 
  the 
  Museum 
  of 
  

   Practical 
  Geology 
  and 
  my 
  own 
  cabinet 
  are 
  of 
  uniform 
  size 
  and 
  

   smaller 
  than 
  those 
  figured 
  by 
  the 
  before-named 
  palaeontologists, 
  

   besides 
  other 
  differences, 
  to 
  which 
  I 
  shall 
  presently 
  allude. 
  

  

  The 
  following 
  is 
  the 
  description 
  : 
  — 
  

  

  Shell 
  ovate, 
  thick. 
  Spire 
  formed 
  of 
  a 
  regular 
  angle 
  composed 
  of 
  

   convex 
  whorls 
  usually 
  five 
  in 
  number 
  ; 
  body-whorl 
  occupying 
  three 
  

   fourths 
  of 
  the 
  whole 
  shell 
  ; 
  sutures 
  somewhat 
  canaliculated. 
  Two 
  

   folds 
  on 
  the 
  columella 
  ; 
  aperture 
  narrow. 
  Outer 
  lip 
  thickened 
  and 
  

   reflected, 
  emarginate 
  and 
  denticulated 
  on 
  the 
  inside. 
  Shell 
  orna- 
  

   mented 
  by 
  fine 
  horizontal 
  lines 
  composed 
  of 
  small 
  ovate 
  punctures, 
  

   with 
  spaces 
  between 
  of 
  about 
  three 
  fourths 
  of 
  a 
  millimetre 
  in 
  

   breadth 
  ; 
  these 
  spaces 
  are 
  quite 
  smooth, 
  having 
  usually 
  from 
  15 
  to 
  

   20 
  lines 
  on 
  the 
  body- 
  whorl. 
  The 
  spaces 
  between 
  the 
  punctate 
  lines 
  

   become 
  broader 
  in 
  the 
  middle 
  of 
  the 
  body- 
  whorl 
  ; 
  in 
  some 
  instances 
  

   they 
  acquire 
  their 
  greatest 
  breadth 
  at 
  the 
  posterior 
  portion 
  of 
  the 
  

   body-whorl. 
  

  

  Length 
  of 
  shell 
  10 
  millims. 
  ; 
  breadth 
  of 
  shell 
  6 
  millims. 
  

  

  This 
  fossil 
  is 
  frequently 
  met 
  with 
  in 
  beds 
  VII., 
  VI., 
  IV., 
  and 
  

   III. 
  in 
  the 
  Lower 
  Gault 
  of 
  Folkestone 
  ; 
  I 
  propose 
  to 
  name 
  it 
  Avel- 
  

   lana 
  ■pulchella. 
  The 
  genus 
  Avellana, 
  D'Orbigny, 
  synonymous 
  with 
  

   Ringinella, 
  D'Orb., 
  is 
  divided 
  into 
  two 
  sections 
  by 
  MM. 
  Pictet 
  et 
  

   Campiche, 
  in 
  ' 
  Pal. 
  Suisse, 
  Environs 
  de 
  Sainte-Croix,' 
  the 
  first 
  

   section 
  being 
  composed 
  of 
  elongated 
  forms 
  with 
  prominent 
  spires, 
  

   and 
  the 
  second 
  section 
  of 
  globose 
  forms 
  with 
  short 
  spires. 
  

  

  Of 
  these 
  the 
  following 
  are 
  recorded 
  as 
  having 
  been 
  found 
  in 
  the 
  

   Gault 
  of 
  England 
  : 
  — 
  

  

  First 
  section. 
  

  

  1. 
  Avellana 
  inflata, 
  D'Orb. 
  pi. 
  168. 
  figs. 
  1-4. 
  

  

  = 
  Auricula 
  inflata, 
  Fitton, 
  1836, 
  Trans. 
  Geol. 
  Soc. 
  vol. 
  iv. 
  pi. 
  13. 
  

   fig. 
  11. 
  

  

  = 
  Cinulia 
  inflata, 
  S. 
  P. 
  Woodward, 
  Manual 
  of 
  Moll. 
  p. 
  314. 
  

  

  2. 
  Avellana 
  Clementina, 
  D'Orb. 
  Pal. 
  Frang.pl. 
  168. 
  

  

  