﻿60 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  with 
  the 
  extreme 
  tips 
  tinged 
  with 
  orange 
  or 
  pink. 
  The 
  ventral 
  

   surface 
  is 
  peculiarly 
  humpy 
  near 
  the 
  middle, 
  owing 
  to 
  a 
  consider- 
  

   able 
  deposit 
  of 
  callus. 
  Figure 
  43 
  a 
  represents 
  the 
  dextral 
  outline 
  

   rather 
  too 
  prominent, 
  and 
  both 
  this 
  and 
  fig. 
  43 
  b 
  delineate 
  the 
  shell 
  

   too 
  broad 
  and 
  the 
  outer 
  lip 
  too 
  thick. 
  

  

  60. 
  Littorina 
  scabra. 
  

  

  Linn., 
  Philippi's 
  Ahbild. 
  vol. 
  ii. 
  p. 
  221, 
  pi. 
  5. 
  figs. 
  3-7 
  ; 
  Reeve, 
  Conch. 
  

   Icon. 
  figs. 
  21 
  a-d. 
  

  

  Hob. 
  Thursday 
  Island, 
  Torres 
  Straits, 
  in 
  mangrove-swamps. 
  

  

  61. 
  Littorina 
  filosa. 
  

  

  Soioerly, 
  Genera 
  Rcc. 
  8f 
  Foss. 
  Shells, 
  fig. 
  5 
  ; 
  Heere, 
  Co7ich. 
  Syst. 
  

   pi. 
  212. 
  fig. 
  5 
  ; 
  Conch. 
  Icon. 
  figs. 
  24 
  a-c; 
  Philippi, 
  Ahhild. 
  vol. 
  iii. 
  

   pp. 
  46 
  & 
  55, 
  pi. 
  6. 
  fig. 
  4, 
  and 
  pi. 
  7. 
  figs. 
  1, 
  2. 
  

  

  Hah. 
  Eoko 
  Island, 
  Endeavour 
  Strait, 
  North 
  Australia, 
  in 
  man- 
  

   grove-swamps. 
  

  

  62. 
  Littorina 
  mauritiana, 
  Lamarclc 
  

   (Var, 
  diemenensis.) 
  

  

  Hah. 
  Port 
  Jackson 
  {Ooppinrjer). 
  

  

  This 
  species 
  is 
  very 
  variable 
  in 
  size, 
  the 
  difi^erence 
  in 
  this 
  respect 
  

   being 
  the 
  only 
  distinction 
  between 
  the 
  typical 
  form 
  and 
  the 
  variety 
  

   named 
  L. 
  diemenensis 
  by 
  Quoy 
  and 
  Gaimard 
  {vide 
  Philippi's 
  excel- 
  

   lent 
  monograph 
  of 
  this 
  genus 
  in 
  the 
  ' 
  Abbild. 
  und 
  Beschreib. 
  neuer 
  

   Conch.' 
  vol. 
  ii. 
  p. 
  195). 
  L. 
  antipodum 
  of 
  Philippi 
  (?. 
  c. 
  pi. 
  4. 
  fig. 
  2) 
  

   and 
  L. 
  acuta 
  of 
  Menke 
  are 
  also 
  small 
  varieties. 
  The 
  European 
  

   L. 
  neritoides 
  of 
  Linn. 
  ( 
  = 
  Turho 
  cceridescens 
  of 
  Lamarck) 
  is 
  considered 
  

   the 
  same 
  species 
  by 
  Mr, 
  Tenison- 
  Woods 
  (Proc. 
  Linn. 
  Soc. 
  N. 
  S. 
  

   Wales, 
  vol. 
  iii. 
  pp. 
  65-72) 
  ; 
  but 
  this 
  determination, 
  I 
  think, 
  requires 
  

   still 
  further 
  substantiation, 
  and 
  I 
  rather 
  incline 
  with 
  Philippi 
  to 
  

   retain 
  that 
  form 
  as 
  distinct. 
  Littorina 
  siczac 
  is 
  a 
  well-known 
  

   West-Indian 
  species, 
  but 
  is 
  also 
  recorded 
  from 
  the 
  Ked 
  Sea 
  and 
  

   Kangaroo 
  Island, 
  South 
  Australia, 
  by 
  Philippi, 
  who 
  remarks 
  that 
  it 
  

   is 
  scarcely 
  separable 
  from 
  L. 
  mauritiana, 
  with 
  the 
  exception 
  of 
  

   colour 
  and, 
  in 
  most 
  cases, 
  a 
  slight 
  difference 
  in 
  the 
  transverse 
  stria- 
  

   tion 
  (?. 
  c. 
  p. 
  165). 
  Mr. 
  Tenison-Woods 
  believes 
  it 
  to 
  be 
  only 
  a 
  

   variety, 
  but 
  at 
  the 
  same 
  time 
  is 
  not 
  prepared 
  to 
  assert 
  this 
  posi- 
  

   tively. 
  He 
  also 
  fails 
  to 
  see 
  any 
  specific 
  difference 
  between 
  this 
  shell 
  

   and 
  L. 
  africayia 
  (Krauss), 
  Philippi. 
  I 
  should 
  here 
  point 
  out 
  that 
  the 
  

   shell 
  figured 
  by 
  Keeve 
  (Conch. 
  Icon. 
  figs. 
  37 
  a, 
  b) 
  is 
  not 
  the 
  true 
  

   Philippian 
  species, 
  but 
  merely 
  L. 
  mauritiana 
  ; 
  and 
  consequently 
  if 
  

   Mr. 
  Tenison-Woods 
  based 
  his 
  opinion 
  upon 
  that 
  figure 
  he 
  is 
  certainly 
  

   correct. 
  L. 
  africana 
  is 
  compared 
  by 
  its 
  author 
  with 
  L. 
  neritoides, 
  

   from 
  which 
  it 
  is 
  said 
  to 
  differ 
  in 
  sculpture, 
  form, 
  and 
  the 
  columella. 
  

  

  