﻿CONTENTS. 
  IX 
  

  

  Papers 
  {continued) 
  — 
  page 
  

  

  On 
  the 
  value 
  of 
  the 
  Gastropod 
  Apex 
  in 
  Classification. 
  By 
  T. 
  

  

  Iredale 
  319 
  

  

  On 
  Valvata 
  Woodwardi, 
  n.sp., 
  and 
  Sphcermm 
  Bidleni, 
  n.sp., 
  from 
  

  

  the 
  Cromerian 
  (Forest 
  Bed) 
  of 
  West 
  Runton, 
  Norfolk. 
  By 
  

  

  A. 
  S. 
  Kennard, 
  F.G.S. 
  (Figs.) 
  324 
  

  

  Description 
  of 
  Oxytes 
  Beddomei, 
  n.sp., 
  from 
  Upper 
  Burma. 
  By 
  

  

  Lieut. 
  -Col. 
  H. 
  H. 
  Godwin-Austen, 
  F.R.S. 
  (Figs.) 
  . 
  . 
  327 
  

  

  On 
  the 
  Mollusca 
  procured 
  during 
  the 
  " 
  Porcupine 
  " 
  Expeditions, 
  

  

  1869-70. 
  Supplemental 
  Notes, 
  Part 
  IV. 
  By 
  E. 
  R. 
  Stkes, 
  

  

  B.A., 
  F.L.S. 
  (Figs.) 
  331 
  

  

  Some 
  remarks 
  on 
  the 
  Nomenclature 
  of 
  the 
  Veneridaj. 
  By 
  

  

  Dr. 
  W. 
  H. 
  Dall 
  349 
  

  

  Description 
  of 
  a 
  new 
  sj)ecies 
  of 
  the 
  genus 
  Comes 
  from 
  South 
  Africa. 
  

  

  By 
  G. 
  B. 
  Sowerby, 
  F.L.S. 
  (Figs.) 
  352 
  

  

  A 
  Modification 
  in 
  the 
  Form 
  of 
  Shell 
  {Siphonaria 
  Algesirce, 
  Quoy) 
  

  

  apparently 
  due 
  to 
  Locality. 
  By 
  the 
  Rev. 
  A. 
  H. 
  Cooke, 
  M.A. 
  

  

  (Figs.) 
  353 
  

  

  Description 
  of 
  a 
  new 
  species 
  of 
  AcyiKxa 
  from 
  Bombay, 
  and 
  notes 
  

  

  on 
  other 
  forms 
  from 
  that 
  locality. 
  By 
  E. 
  A. 
  Smith, 
  I.S.O. 
  

  

  (Figs.) 
  356 
  

  

  Diagnoses 
  of 
  three 
  new 
  Operculate 
  Land 
  Shells 
  from 
  Grand 
  Cayman 
  

  

  Island. 
  By 
  H. 
  B. 
  Preston, 
  F.Z.S. 
  (Figs.) 
  . 
  . 
  . 
  .359 
  

   Further 
  note 
  on 
  preoccupied 
  MoUuscan 
  Generic 
  Names 
  and 
  a 
  

  

  proposed 
  new 
  genus 
  of 
  the 
  family 
  Helicidee. 
  By 
  G. 
  K. 
  Gude, 
  

  

  F.Z.S. 
  (Figs.) 
  361 
  

  

  On 
  the 
  modifications 
  in 
  form 
  of 
  the 
  Uijper 
  Tertiary 
  lacustrine 
  

  

  shells 
  of 
  the 
  Island 
  of 
  Cos, 
  as 
  first 
  observed 
  by 
  Edward 
  Forbes 
  

  

  and 
  T. 
  A. 
  B. 
  Spratt. 
  By 
  R. 
  B. 
  Newton, 
  F.G.S. 
  (Plate 
  XII.) 
  363 
  

  

  