﻿361 
  

  

  FUETHEE 
  NOTE 
  ON 
  PEEOCCUPIED 
  MOLLUSCAN 
  GENEEIC 
  NAMES 
  

   AND 
  A 
  PEOPOSED 
  NEW 
  GENUS 
  OF 
  THE 
  FAMILY 
  HELICID^E. 
  

  

  By 
  G. 
  K. 
  GuDE, 
  F.Z.S. 
  

  

  Read 
  9th 
  June, 
  1911. 
  

  

  Since 
  my 
  former 
  note 
  on 
  preoccupied 
  generic 
  names 
  of 
  Mollusca 
  was 
  

   printed 
  in 
  these 
  " 
  Proceedings" 
  Mr. 
  Ponsonby 
  has 
  kindly 
  drawn 
  my 
  

   attention 
  to 
  the 
  fact 
  that 
  Conrad 
  created 
  a 
  sub-genus 
  of 
  Wmo 
  under 
  

   the 
  name 
  of 
  Ccelatura 
  in 
  1 
  853.^ 
  The 
  Zonitoid 
  genus 
  Ccelatura 
  established 
  

   in 
  1877 
  \i\ 
  Pfeiffer^ 
  as 
  a 
  subsection 
  of 
  Hemicyda 
  for 
  the 
  reception 
  of 
  

   Helix 
  ccelatura, 
  Eer., 
  consequently 
  requires 
  a 
  new 
  name, 
  and 
  I 
  propose 
  

   to 
  substitute 
  Plegma 
  ^ 
  for 
  it. 
  

  

  "While 
  working 
  at 
  French 
  Tertiary 
  Mollusca 
  I 
  found 
  that 
  DacUjKus, 
  

   proposed 
  as 
  a 
  section 
  of 
  Amphtdronms 
  hj 
  Sandberger* 
  in 
  1873, 
  with 
  

   Bulimus 
  l(svolongiis, 
  Boubee, 
  from 
  the 
  Oligocene 
  as 
  the 
  type, 
  is 
  not 
  

   available 
  in 
  Mollusca, 
  the 
  name 
  having 
  been 
  employed 
  in 
  Vermes 
  as 
  

   far 
  back 
  as 
  1839. 
  While 
  slightly 
  modifying 
  the 
  name 
  to 
  Daclylo- 
  

   morplia,^ 
  I 
  propose 
  to 
  raise 
  the 
  group 
  to 
  generic 
  rank, 
  dissociating 
  it 
  

   from 
  Amphidromus 
  . 
  The 
  genus 
  comprises, 
  besides 
  the 
  type, 
  three 
  

   other 
  known 
  species, 
  i.e. 
  suicylindrica, 
  Matheron,® 
  Serresi, 
  Matheron,'' 
  

   and 
  Rohiacensis, 
  Soman. 
  * 
  

  

  An 
  analogous 
  case 
  is 
  that 
  of 
  Coryna, 
  Westerlund, 
  1887. 
  The 
  

   Swedish 
  Professor 
  proposed 
  the 
  name^ 
  in 
  lieu 
  of 
  Sphyradium, 
  

   Hartmann, 
  1840, 
  a 
  section 
  of 
  Pupa, 
  having 
  P. 
  Ferrari, 
  Porro,^° 
  for 
  

   type 
  (not 
  Sphyradium, 
  Charpentier, 
  1837). 
  Coryna 
  being 
  preoccupied 
  

   in 
  Coleoptera 
  (Billberg, 
  1813), 
  I 
  propose 
  to 
  substitute 
  Agardhia, 
  in 
  

   honour 
  of 
  Dr. 
  Carl 
  Agard 
  Westerlund. 
  

  

  Among 
  the 
  many 
  interesting 
  Mollusca 
  from 
  the 
  Oligocene 
  phosphate 
  

   deposits 
  of 
  Quercy 
  in 
  the 
  Department 
  of 
  Tarn 
  occurs 
  an 
  aberrant 
  

   form 
  of 
  Helicoid 
  described 
  by 
  Bourguignat 
  as 
  Helix 
  Filholi. 
  While 
  

   admitting 
  that 
  he 
  knew 
  no 
  other 
  species 
  of 
  Helix 
  to 
  which 
  it 
  bears 
  

   any 
  resemblance, 
  he 
  compares 
  it 
  with 
  H. 
  gregaria. 
  The 
  comparison 
  

   is 
  not, 
  in 
  my 
  opinion, 
  a 
  happy 
  one, 
  as 
  neither 
  that 
  species 
  nor 
  any 
  of 
  

   its 
  allies 
  has 
  the 
  sunken 
  spire 
  and 
  rapidly 
  increasing 
  whorls 
  which 
  

   cliaracterize 
  H. 
  Filholi 
  and 
  separate 
  it 
  from 
  any 
  other 
  known 
  form. 
  

   I 
  therefore 
  propose 
  to 
  create 
  for 
  its 
  reception 
  a 
  new 
  genus, 
  placing 
  

   it 
  provisionally 
  next 
  to 
  Hygromia. 
  

  

  ;^ 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  1853, 
  p. 
  268. 
  

  

  " 
  Malak. 
  Blatt., 
  xxiv, 
  p. 
  8. 
  

  

  •' 
  TrXey/j.a, 
  in 
  allusion 
  to 
  the 
  reticulate 
  sculpture. 
  

  

  ■• 
  Land 
  u. 
  Siissw. 
  Conch. 
  Vorwelt, 
  p. 
  287. 
  

  

  •' 
  SaKTv\os, 
  finger 
  ; 
  fj-ofxpri, 
  form. 
  

  

  « 
  Catal. 
  Meth. 
  foss. 
  Bouches 
  du 
  Ehone, 
  1843, 
  p. 
  207. 
  

  

  ■^ 
  Mem. 
  See. 
  Emul. 
  Provence, 
  vol. 
  i, 
  1862, 
  p. 
  203 
  ; 
  Eoman, 
  Bull. 
  Sec. 
  G^ol. 
  

  

  France, 
  ser. 
  rv, 
  vol. 
  iii, 
  1903, 
  p. 
  590, 
  fig. 
  8. 
  

   « 
  Bull. 
  Soc. 
  Geol. 
  France, 
  ser. 
  IV, 
  vol. 
  iii, 
  1903, 
  p. 
  598, 
  fig. 
  13, 
  and 
  pi. 
  xx, 
  

  

  figs. 
  11-13. 
  

   ^ 
  Fauna 
  Palaarct. 
  Binnenconch., 
  vol. 
  iii, 
  p. 
  87. 
  

   ^" 
  Malac. 
  Prov. 
  Comasca, 
  1838, 
  p. 
  57, 
  pi. 
  i, 
  fig. 
  4. 
  

  

  VOL. 
  IX. 
  — 
  SEPTEMBER, 
  1911. 
  26 
  

  

  