﻿IREDALE 
  : 
  THE 
  GASTROPOD 
  APEX 
  IN 
  CLASSIFICATION. 
  323 
  

  

  by 
  a 
  study 
  of 
  the 
  apices 
  of 
  the 
  Marine 
  Gastropods, 
  and 
  it 
  is 
  to 
  draw 
  

   attention 
  to 
  the 
  importance 
  of 
  this 
  study 
  that 
  this 
  note 
  is 
  written. 
  

   There 
  seems 
  to 
  be 
  no 
  doubt 
  whatever 
  that 
  in 
  addition 
  to 
  the 
  genera 
  

   I 
  have 
  named, 
  Cantharus, 
  Peristernia, 
  Euthria, 
  Drupa, 
  Siphonalia, 
  to 
  

   quote 
  only 
  the 
  first 
  that 
  come 
  to 
  mind, 
  are, 
  as 
  at 
  present 
  constituted, 
  

   polyphyletic, 
  and 
  until 
  the 
  work 
  of 
  dismemberment 
  suggested 
  bj' 
  the 
  

   apical 
  features 
  is 
  carried 
  out, 
  all 
  attempts 
  at 
  higher 
  groupings 
  must 
  

   prove 
  futile. 
  

  

  VOL. 
  IX. 
  — 
  .TUNE, 
  1911. 
  23 
  

  

  