﻿MOLLUSCA. 
  493 
  

  

  25. 
  ColumlDella 
  nympha, 
  Kiener. 
  

   Providence 
  Reef, 
  Masearenes, 
  24 
  frns. 
  

  

  26. 
  Columbella 
  seychellensis. 
  (Plate 
  XLIV. 
  fig. 
  G.) 
  

  

  Shell 
  small, 
  narrow, 
  ovate-fusiform, 
  opaque 
  white, 
  irregularly 
  

   blotched 
  with 
  brown. 
  Whorls 
  9, 
  three 
  apical 
  smooth, 
  concave 
  ; 
  

   the 
  rest 
  only 
  very 
  slightly 
  concave, 
  separated 
  by 
  a 
  linear 
  suture, 
  

   above 
  which 
  revolves 
  a 
  white 
  line 
  dotted 
  with 
  brown, 
  which 
  also 
  

   passes 
  round 
  the 
  middle 
  of 
  the 
  last 
  whorl 
  ; 
  this 
  is 
  not 
  much 
  con- 
  

   tracted 
  at 
  the 
  lower 
  part, 
  around 
  which 
  there 
  are 
  about 
  half-a- 
  

   dozen 
  oblique 
  grooves. 
  The 
  aperture 
  is 
  long 
  and 
  narrow, 
  together 
  

   with 
  the 
  oblique 
  basal 
  canal 
  occiqjying 
  rather 
  less 
  than 
  the 
  whole 
  

   length 
  of 
  the 
  shell. 
  The 
  outer 
  lip 
  is 
  thickened 
  externally 
  by 
  a 
  

   broadish 
  white 
  varix. 
  The 
  columella 
  is 
  nearly 
  perpendicular 
  at 
  the 
  

   middle, 
  and 
  covered 
  with 
  a 
  thin 
  callosity. 
  Length 
  8 
  millim., 
  

   greatest 
  width 
  3. 
  

  

  Sej'chelle 
  Islands, 
  4-12 
  fms. 
  

  

  This 
  curious 
  little 
  species 
  is 
  somewhat 
  chrj-saloid 
  in 
  form. 
  The 
  

   outlines 
  of 
  the 
  spire 
  are 
  just 
  a 
  little 
  concave 
  below 
  the 
  apex, 
  and 
  

   gradually 
  become 
  slightly 
  convex 
  lower 
  down. 
  The 
  outer 
  lip 
  in 
  the 
  

   single 
  specimen 
  at 
  hand 
  is 
  smooth 
  within, 
  having 
  been 
  inhabited 
  by 
  

   a 
  minute 
  Pagurus 
  ; 
  but 
  it 
  is 
  very 
  probable 
  that 
  fine 
  lirae 
  wiU 
  be 
  met 
  

   with 
  in 
  other 
  specimens. 
  

  

  27. 
  Columbella 
  moleculina. 
  

  

  Dticlos, 
  Monogr. 
  Columbc4la, 
  pi. 
  9. 
  figs. 
  1 
  & 
  2 
  ; 
  id. 
  in 
  ChemCs 
  Illustr. 
  

   Conch, 
  pi. 
  9. 
  figs. 
  1 
  & 
  2. 
  

  

  Etoile 
  Island, 
  Amirantes, 
  13 
  fms. 
  {Oojjpinger) 
  • 
  Marquesas 
  

   (Pease, 
  in 
  Brit. 
  Miis.) 
  ; 
  Malvcira 
  Harbour, 
  San 
  Christoval, 
  Solomon 
  

   Islands 
  (J. 
  Brazier, 
  in 
  Brit. 
  Mus.). 
  

  

  This 
  species, 
  although 
  characteristically 
  figured 
  in 
  the 
  above 
  un- 
  

   finished 
  monographs, 
  has 
  not, 
  I 
  believe, 
  been 
  as 
  yet 
  described. 
  It 
  

   is 
  small, 
  ovately 
  fusiform, 
  glossy, 
  white, 
  covered 
  with 
  a 
  network 
  or 
  

   connected 
  circles 
  of 
  a 
  yellowish-brown 
  colour, 
  varied 
  with 
  two 
  

   interrupted 
  dark-brown 
  transverse 
  lines, 
  one 
  at 
  the 
  upper 
  part 
  of 
  

   the 
  whorls 
  a 
  little 
  below 
  the 
  suture, 
  where 
  the 
  ground-colour 
  is 
  at 
  

   times 
  opaque 
  snowy 
  white, 
  and 
  the 
  other, 
  consisting 
  of 
  less 
  elongate 
  

   spots, 
  round 
  the 
  base 
  of 
  the 
  body-whorl. 
  Volutions 
  8, 
  smooth, 
  

   three 
  apical 
  convex, 
  the 
  rest 
  nearly 
  flat 
  at 
  the 
  sides, 
  very 
  fiiintly 
  

   gradated 
  ; 
  the 
  last 
  rounded 
  at 
  the 
  middle, 
  contracted 
  beneath, 
  and 
  

   strongly 
  transversely 
  grooved 
  at 
  the 
  extremity. 
  Aperture 
  small, 
  con- 
  

   tracted 
  into 
  a 
  short 
  oblique 
  canal 
  in 
  front. 
  Outer 
  lip 
  strengthened 
  

   with 
  a 
  remarkably 
  broad 
  external 
  varix, 
  distinctly 
  sinuated 
  a 
  little 
  

   below 
  the 
  suture 
  and 
  armed 
  within 
  with 
  six 
  small 
  denticles, 
  of 
  

   which 
  the 
  second 
  and 
  third 
  below 
  the 
  sinus 
  are 
  usually 
  the 
  largest. 
  

   Columella 
  covered 
  with 
  a 
  callus 
  bearing 
  throe 
  or 
  four 
  elongate 
  

   transverse 
  tubercles 
  at 
  the 
  lower 
  part. 
  Length 
  6 
  millim., 
  width 
  2^. 
  

  

  