﻿308 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  jSTat., 
  vol. 
  ix, 
  pp. 
  281-310, 
  pi. 
  xii, 
  1868, 
  anatomy; 
  Menegaux, 
  

   Recherches 
  Circulation 
  Lamellib., 
  1890, 
  pp. 
  44-8, 
  figs, 
  anatomy. 
  

  

  v. 
  mytilina, 
  Lamarck, 
  op. 
  cit., 
  p. 
  268, 
  abnormal; 
  Eeeve, 
  fig. 
  4, 
  worn 
  

   and 
  faded 
  specimen 
  ; 
  Clessin, 
  pi. 
  vi, 
  fig. 
  6. 
  

  

  F. 
  Mans, 
  Lamarck, 
  op. 
  cit., 
  p. 
  221. 
  

  

  V. 
  trita, 
  Reeve, 
  op. 
  cit., 
  fig. 
  17, 
  worn 
  and 
  stunted 
  shell; 
  Clessin, 
  

   pi. 
  vii, 
  fig. 
  7, 
  after 
  Eeeve. 
  

   Sah. 
  — 
  Red 
  Sea, 
  Madagascar, 
  Tranquehar, 
  Singapore, 
  IS^orth 
  Borneo, 
  

   Philippines, 
  Japan, 
  North 
  Australia, 
  ISTew 
  Caledonia. 
  

  

  Dunker^ 
  has 
  already 
  suggested 
  that 
  V. 
  mytilina 
  is 
  a 
  form 
  of 
  

   lingulata, 
  at 
  least 
  he 
  considered 
  the 
  shell 
  figured 
  by 
  Reeve 
  a 
  worn 
  

   abnormal 
  specimen 
  of 
  it. 
  Having 
  now 
  seen 
  the 
  very 
  large 
  shell 
  

   named 
  by 
  Lamarck 
  mytilina 
  (PL 
  XI, 
  Fig. 
  1) 
  and 
  also 
  that 
  figured 
  by 
  

   Reeve 
  under 
  that 
  name, 
  I 
  quite 
  agree 
  with 
  Dunker 
  in 
  his 
  decision. 
  

   Lamarck 
  described 
  his 
  shell 
  as 
  'alba', 
  which 
  it 
  certainly 
  is 
  not. 
  It 
  

   is 
  of 
  a 
  livid 
  tint, 
  and 
  exhibits 
  in 
  places 
  quite 
  distinct 
  brown 
  lines 
  like 
  

   those 
  which 
  are 
  so 
  characteristic 
  of 
  V. 
  vulsella. 
  In 
  the 
  shell 
  figured 
  

   by 
  Reeve 
  these 
  lines 
  are 
  also 
  observable, 
  although 
  no 
  mention 
  of 
  them 
  

   is 
  made 
  by 
  that 
  author. 
  I 
  do 
  not 
  think 
  Chemnitz's 
  figures 
  (Conch. 
  

   Cab., 
  vol. 
  vi, 
  pi. 
  ii, 
  figs. 
  8, 
  9) 
  which 
  Mr. 
  Cooke 
  places 
  in 
  the 
  

   synonymy 
  of 
  mytilina 
  have 
  anything 
  to 
  do 
  with 
  it, 
  nor 
  can 
  I 
  agree 
  

   with 
  his 
  statement 
  respecting 
  the 
  want 
  of 
  colouring 
  in 
  Reeve's 
  

   specimen 
  of 
  mytilina, 
  for, 
  as 
  I 
  have 
  already 
  stated, 
  the 
  brown 
  lines 
  

   are 
  quite 
  discernible. 
  

  

  V. 
  trita. 
  Reeve 
  (fig. 
  17), 
  is 
  probably 
  a 
  stunted 
  or 
  half- 
  grown 
  

   specimen 
  of 
  V. 
  vulsella 
  in 
  a 
  dreadfully 
  worn 
  condition, 
  having 
  only 
  

   a 
  trace 
  of 
  brown 
  lineations 
  at 
  the 
  lower 
  margin. 
  I 
  cannot 
  associate 
  

   it 
  with 
  V. 
  spongiariim 
  as 
  Mr. 
  Cooke 
  has 
  done. 
  Its 
  condition, 
  however, 
  

   is 
  so 
  bad 
  that 
  it 
  is 
  hardly 
  possible 
  to 
  determine 
  with 
  any 
  degree 
  of 
  

   certainty 
  to 
  what 
  species 
  it 
  really 
  belongs. 
  Well 
  maj^ 
  Mr. 
  Cooke 
  

   observe, 
  " 
  only 
  those 
  who 
  have 
  seen 
  the 
  type 
  of 
  this 
  shell 
  can 
  realize 
  

   to 
  what 
  depth 
  species-makers 
  can 
  descend." 
  He 
  might 
  also 
  have 
  

   made 
  the 
  same 
  remark 
  respecting 
  pholadiformis, 
  Reeve. 
  Since 
  the 
  

   above 
  was 
  written 
  I 
  have 
  obtained 
  specimens 
  in 
  good 
  condition 
  from 
  

   Messrs. 
  Sowerby 
  and 
  Fulton 
  which 
  prove 
  beyond 
  a 
  doubt 
  that 
  K 
  trita 
  

   is 
  only 
  a 
  young 
  stage 
  of 
  the 
  present 
  species. 
  

  

  The 
  photographs 
  and 
  drawing 
  of 
  Lamarck's 
  type 
  of 
  V. 
  Mans 
  (PI. 
  XI, 
  

   Figs. 
  2, 
  3) 
  clearly 
  show 
  that 
  it 
  is 
  a 
  short 
  example 
  of 
  V. 
  vulsella. 
  The 
  

   character 
  of 
  the 
  lin 
  cation 
  and 
  the 
  fine 
  granose 
  seiilpture 
  are 
  precisely 
  

   the 
  same 
  as 
  in 
  the 
  typical 
  elongate 
  form, 
  and 
  the 
  non-divergent 
  

   umbones 
  are 
  also 
  characteristic. 
  Reeve 
  (Conch. 
  Icon., 
  fig. 
  16) 
  has 
  

   figured 
  a 
  form 
  V. 
  rtigosa 
  as 
  V. 
  Mans. 
  

  

  In 
  his 
  review 
  of 
  this 
  genus 
  the 
  Rev. 
  A. 
  H. 
  Cooke 
  ^ 
  has 
  made 
  a 
  most 
  

   remarkable 
  mistake 
  in 
  connection 
  with 
  V. 
  vulsella, 
  the 
  present 
  species. 
  

   How 
  such 
  an 
  error 
  could 
  have 
  been 
  committed 
  it 
  is 
  difficult 
  to 
  

   conceive. 
  He 
  has 
  given 
  a 
  rough 
  translation 
  of 
  Rumphius's 
  observations 
  

   on 
  the 
  habitat 
  of 
  an 
  Ostrea 
  attached 
  to 
  stems 
  of 
  mangrove, 
  being 
  under 
  

  

  ^ 
  Jahrb. 
  deutsch. 
  Malak. 
  Ges., 
  vol. 
  ii, 
  p. 
  2, 
  1875. 
  

   ^ 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  vol. 
  xvii, 
  p. 
  63, 
  1886. 
  

  

  