﻿IKKDALE 
  : 
  MOLLUSCAN 
  NOMENCLATUEAL 
  PROBLEMS. 
  29 
  

  

  levelled 
  at 
  the 
  worker, 
  but 
  at 
  the 
  present 
  time 
  I 
  conclude 
  it 
  is 
  the 
  

   only 
  means 
  of 
  making 
  progress. 
  Tlius, 
  quite 
  recently, 
  I 
  published 
  

   some 
  notes 
  giving 
  the 
  correct 
  names 
  as 
  determined 
  at 
  that 
  time 
  : 
  such 
  

   decisions 
  were 
  based 
  on 
  my 
  own 
  results, 
  confirmed 
  by 
  the 
  usage 
  of 
  

   such 
  specialists 
  as 
  Dall, 
  Hedley, 
  Cossmann, 
  etc., 
  j'et 
  continuing 
  my 
  

   investigations 
  I 
  find 
  further 
  corrections 
  necessary, 
  and 
  the 
  case 
  of 
  

   Eumeta 
  herein 
  given 
  may 
  be 
  quoted 
  as 
  an 
  example, 
  while 
  I 
  have 
  

   others 
  under 
  consideration, 
  sucli 
  as 
  Azor. 
  

  

  Teitonia, 
  Cuvier. 
  

  

  As 
  introducing 
  a 
  number 
  of 
  noraenclatural 
  complexes 
  the 
  genus 
  

   name 
  Tritonia 
  furnishes 
  a 
  good 
  example. 
  Tiie 
  first 
  introduction 
  of 
  

   this 
  name 
  seems 
  to 
  be 
  that 
  of 
  Cuvier 
  in 
  the 
  Tabl. 
  Elem. 
  Hist. 
  Nat., 
  

   Jan. 
  1798, 
  p. 
  387, 
  where 
  a 
  genus 
  is 
  diagnosed 
  but 
  no 
  species 
  are 
  

   named 
  in 
  connexion. 
  The 
  name 
  Tritonium 
  had 
  been 
  proposed 
  at 
  an 
  

   earlier 
  date. 
  Under 
  the 
  usage 
  of 
  British 
  workers 
  the 
  later 
  name 
  

   should 
  be 
  discarded, 
  but 
  in 
  this 
  case 
  for 
  some 
  unknown 
  reason 
  the 
  

   practice 
  was 
  not 
  followed. 
  In 
  1801 
  Lamarck 
  accepted 
  the 
  Cuvierian 
  

   name 
  and 
  gave 
  as 
  example 
  the 
  species 
  clctvigera, 
  Miiller 
  (Syst. 
  Anim, 
  

   s. 
  Vert., 
  p. 
  65, 
  Jan.). 
  According 
  to 
  the 
  International 
  llules 
  this 
  

   must 
  be 
  accepted 
  as 
  the 
  monotype 
  of 
  Cuvier's 
  genus, 
  but 
  I 
  cannot 
  

   understand 
  the 
  ruling, 
  while 
  in 
  this 
  case 
  Cuvier 
  later 
  noted 
  that 
  

   clavicjera, 
  JSliiller, 
  might 
  be 
  regarded 
  as 
  a 
  member 
  of 
  the 
  genus, 
  but 
  

   no 
  certainty 
  was 
  expressed. 
  However, 
  in 
  1800 
  Meigen 
  correctly 
  

   proposed 
  the 
  name 
  Tritonia 
  for 
  a 
  genus 
  of 
  Insects 
  : 
  the 
  point 
  is, 
  does 
  

   the 
  Cuvier-Lamarck 
  name, 
  1798-1801, 
  anticipate 
  Meigen, 
  1800? 
  

  

  In 
  the 
  Ann. 
  Mus. 
  Hist. 
  Nat., 
  Paris, 
  vol. 
  i, 
  p. 
  483, 
  April, 
  1803, 
  

   Cuvier 
  fully 
  diagnosed 
  his 
  genus 
  Tritonia^ 
  illustrating 
  a 
  fine 
  new 
  

   species, 
  T. 
  hnmhergi, 
  and 
  this 
  has 
  gained 
  acceptance 
  as 
  repre- 
  

   sentative 
  of 
  Tritonia 
  and 
  of 
  the 
  family 
  Tritoniidse. 
  Lamarck's 
  

   selection, 
  although 
  prior, 
  was 
  dismissed 
  as 
  not 
  being 
  that 
  of 
  Cuvier, 
  

   and 
  the 
  name 
  Triopa 
  proposed 
  by 
  Johnston 
  (Ann. 
  Nat. 
  Hist., 
  vol. 
  i, 
  

   p. 
  123, 
  April, 
  1838) 
  for 
  clavigera, 
  Miiller, 
  has 
  been 
  used 
  instead. 
  It 
  

   may 
  be 
  noted 
  that 
  the 
  two 
  species 
  Jiombergi 
  and 
  clavigera 
  belong 
  to 
  

   very 
  different 
  families. 
  If 
  the 
  Cuvier-Lamarck 
  name 
  be 
  accepted 
  it 
  

   would 
  displace 
  Triopa. 
  Several 
  substitute 
  names 
  are 
  on 
  record. 
  

   Euphtirus 
  was 
  proposed 
  for 
  IVitonia, 
  Lam., 
  by 
  Rafinesque 
  (Anal. 
  

   Nat., 
  1815, 
  p. 
  142), 
  while 
  Gistel, 
  in 
  1848, 
  introduced 
  Necromantes 
  and 
  

   Liriope 
  for 
  Tritonia, 
  Cuvier, 
  mentioning 
  homhergi 
  in 
  the 
  latter 
  case. 
  

   However, 
  in 
  1843, 
  Macgillivray 
  had 
  described 
  a 
  new 
  species 
  and 
  

   genus, 
  Sphceroatoma 
  jamesonii 
  (Hist. 
  Moll. 
  Anim. 
  Aherd., 
  pp. 
  335-6), 
  

   which 
  has 
  been 
  identified 
  with 
  Tritonia 
  homhergi, 
  Cuvier. 
  

  

  Under 
  these 
  conditions 
  I 
  suggest 
  the 
  rejection 
  of 
  Tritonia, 
  Cuvier, 
  

   as 
  being 
  preoccupied 
  by 
  Tritonium, 
  Miiller, 
  1774, 
  and 
  thus 
  remove 
  

   a 
  most 
  perplexing 
  and 
  unsatisfactory 
  problem 
  from 
  Nudibranch 
  

   nomenclature. 
  

  

  Then 
  Euphurus, 
  llafinesque, 
  would 
  be 
  available 
  for 
  the 
  genus 
  now 
  

   called 
  Triopa, 
  and 
  SpJiarosioma, 
  Macgillivray, 
  for 
  the 
  one 
  now 
  bearing 
  

   the 
  name 
  Tritonia, 
  Cuvier, 
  and 
  of 
  the 
  latter 
  Necromantes 
  and 
  Liriope, 
  

   Gistel, 
  would 
  be 
  synonyms. 
  I 
  give 
  a 
  full 
  list 
  of 
  Gistel's 
  names 
  later. 
  

  

  