﻿MOLLUSCA. 
  57 
  

  

  11 
  fms., 
  and 
  Port 
  Molle, 
  14 
  fms. 
  {Coppinger) 
  ; 
  Palm 
  Island, 
  Cape 
  

   York, 
  Cape 
  Grenville, 
  Darnley 
  Island, 
  &;c. 
  (Brazier). 
  

  

  "The 
  two 
  embryonic 
  whorls 
  of 
  this 
  pretty 
  species 
  are 
  smooth, 
  

   glossy, 
  and 
  very 
  convex. 
  The 
  colour 
  of 
  the 
  fresh 
  specimen 
  from 
  

   Port 
  Curtis 
  is 
  light 
  yellowish 
  brown, 
  with 
  a 
  dark 
  brown 
  band 
  at 
  

   the 
  upper 
  part 
  of 
  the 
  whorls 
  immediately 
  beneath 
  the 
  suture. 
  The 
  

   operculum 
  is 
  ovate, 
  rather 
  acuminated 
  below, 
  concentrically 
  striated, 
  

   with 
  the 
  nucleus 
  near, 
  but 
  not 
  at, 
  the 
  lower 
  extremity. 
  

  

  47. 
  Natica 
  (Lunatia) 
  plumbea. 
  

  

  Natica 
  plumbea, 
  Lamarck, 
  Philippi 
  in 
  Kilster^s 
  Con.-Cab. 
  p. 
  61, 
  pi. 
  8. 
  

  

  figs. 
  3, 
  4 
  ; 
  Reeve, 
  Conch. 
  Icon. 
  figs. 
  34 
  a, 
  b. 
  

   Natica 
  strangei, 
  Reeve, 
  I. 
  c. 
  figs. 
  81 
  a, 
  h. 
  

   Exemplum 
  distortura= 
  Natica 
  leucophaea, 
  Reeve, 
  I, 
  c. 
  figs. 
  51 
  a, 
  b. 
  

  

  Hah. 
  Port 
  Denison, 
  Queensland, 
  on 
  the 
  shore 
  {Coppinger) 
  ; 
  Cape 
  

   Upstart, 
  and 
  from 
  north 
  of 
  Cape 
  Hillsboro', 
  N.E. 
  Australia, 
  crawl- 
  

   ing 
  on 
  sand- 
  or 
  mud-banks 
  at 
  low-water 
  mark 
  {J. 
  B. 
  Jukes 
  in 
  Brit. 
  

   Mus.) 
  ; 
  Port 
  Essiugton 
  (Capt. 
  Wiclcham, 
  E.N.) 
  ; 
  Brisbane 
  Water 
  

   (Strange) 
  ; 
  New 
  South 
  Wales 
  (Angas), 
  &c. 
  

  

  48. 
  Natica 
  limpida. 
  (Plate 
  V. 
  fig. 
  L.) 
  

  

  Shell 
  subglobose, 
  thinnish, 
  semitransparent, 
  whitish, 
  somewhat 
  

   narrowly 
  unbilicated, 
  glossy, 
  sculptured 
  with 
  fine 
  lines 
  of 
  growth. 
  

   Spire 
  small, 
  culminating 
  in 
  an 
  obtuse 
  apex. 
  Whorls 
  3|, 
  very 
  

   convex, 
  rapidly 
  increasing, 
  separated 
  by 
  a 
  simple 
  linear 
  suture, 
  

   beneath 
  which 
  there 
  is 
  a 
  narrow 
  opaque-white 
  margin. 
  Aperture 
  

   rather 
  more 
  than 
  semicircular, 
  narrower 
  above 
  than 
  at 
  the 
  lower 
  

   part. 
  Columella 
  slightly 
  oblique, 
  straightish 
  or 
  only 
  feebly 
  arcuate, 
  

   a 
  little 
  thickened, 
  somewhat 
  expanded 
  at 
  the 
  upper 
  part, 
  and 
  joined 
  

   to 
  the 
  extremity 
  of 
  the 
  outer 
  lip 
  by 
  a 
  thin 
  callosity. 
  Outer 
  lip 
  

   (viewed 
  laterally) 
  a 
  trifle 
  oblique, 
  and 
  exhibiting 
  near 
  the 
  suture 
  

   a 
  small 
  shallow 
  sinuation. 
  Umbilicus 
  rather 
  narrow, 
  without 
  any 
  

   internal 
  ridge. 
  Operculum 
  unknown. 
  Length 
  8 
  millim. 
  ; 
  greatest 
  

   diameter 
  i), 
  smallest 
  6^. 
  

  

  Hah. 
  West 
  Island, 
  Prince 
  of 
  Wales 
  Channel, 
  Torres 
  Straits, 
  

   7 
  fms. 
  

  

  This 
  may 
  prove 
  eventually 
  to 
  be 
  the 
  young 
  state 
  of 
  the 
  species, 
  

   a 
  supposition 
  partly 
  based 
  upon 
  the 
  larger 
  size 
  of 
  the 
  nuclear 
  whorls 
  

   and 
  partly 
  upon 
  the 
  thin 
  semitransparent 
  character 
  of 
  the 
  shell. 
  

  

  49. 
  Natica 
  (Mamma) 
  columnaris. 
  

  

  Natica 
  columnaris, 
  Rech(z, 
  Reeve, 
  Conch. 
  Icon. 
  figs. 
  19 
  a, 
  b. 
  

  

  Hah. 
  Prince 
  of 
  Wales 
  Channel, 
  9 
  fms. 
  (Coppinger) 
  ; 
  Philippine 
  

   Islands 
  (Cuming) 
  ; 
  Ceylon 
  (E. 
  W. 
  H. 
  Holdsworth 
  iji 
  Brit. 
  Mus.). 
  

  

  