﻿MOLLrSCA. 
  65 
  

  

  again 
  below 
  this 
  by 
  about 
  seventeen 
  others, 
  having 
  the 
  furrows 
  

   between 
  them 
  sculptured 
  like 
  those 
  of 
  the 
  spire. 
  The 
  aperture 
  is 
  

   narrow, 
  brownish 
  within, 
  about 
  half 
  as 
  long 
  as 
  the 
  shell. 
  The 
  

   columella 
  is 
  four-plaited, 
  and 
  the 
  outer 
  lip 
  crenulated 
  at 
  the 
  edges. 
  

   Length 
  37 
  millim., 
  diam. 
  13. 
  

  

  Hah. 
  Port 
  Curtis, 
  Queensland 
  {Coppinger) 
  ; 
  island 
  of 
  Ticao, 
  

   Philippines 
  {Cuming). 
  

  

  The 
  above 
  description 
  has 
  been 
  drawn 
  up 
  from 
  two 
  specimens 
  

   differing 
  in 
  certain 
  particulars 
  from 
  the 
  type, 
  one 
  from 
  each 
  of 
  the 
  

   above 
  localities. 
  In 
  the 
  British 
  Museum 
  thei'e 
  are 
  two 
  examples 
  

   of 
  the 
  typical 
  form 
  from 
  Kurrachee 
  and 
  Bombay, 
  presented 
  by 
  

   W. 
  T. 
  Blanford, 
  Esq., 
  by 
  whom 
  they 
  were 
  collected. 
  The 
  variety 
  

   differs 
  in 
  having 
  the 
  spire 
  ungradated, 
  a 
  feature 
  giving 
  the 
  outline 
  a 
  

   very 
  different 
  form, 
  and 
  in 
  having 
  some 
  of 
  the 
  upper 
  liraa 
  upon 
  the 
  

   last 
  and 
  preceding 
  whorls 
  double 
  ; 
  both 
  forms 
  have 
  that 
  immediately 
  

   beneath 
  the 
  suture 
  more 
  or 
  less 
  tripartite 
  on 
  the 
  last 
  volution, 
  but 
  

   in 
  the 
  variety 
  this 
  peculiarity 
  extends 
  to 
  the 
  penultimate 
  whorl. 
  

  

  42. 
  Mitrai 
  peasei. 
  

  

  Dohrn, 
  Proc. 
  Soc. 
  Zool. 
  1800, 
  p. 
  366; 
  Soxcerby, 
  Thes. 
  Conch, 
  iv. 
  

   pi. 
  357. 
  fig. 
  76. 
  

  

  Hah. 
  Port 
  MoUe 
  {Coppinger) 
  ; 
  Australia 
  (Dohrn). 
  

  

  The 
  figure 
  in 
  Mr. 
  Sowerby's 
  work 
  of 
  this 
  species 
  represents 
  the 
  

   spire 
  too 
  suddenly 
  tapering, 
  the 
  aperture 
  too 
  wide, 
  and 
  the 
  plaits 
  

   on 
  the 
  columella 
  should 
  be 
  less 
  equal 
  in 
  size 
  and 
  five 
  in 
  number 
  

   instead 
  of 
  four. 
  The 
  specimen 
  from 
  Port 
  MoUe 
  is 
  not 
  absolutely 
  

   identical 
  with 
  the 
  type 
  described 
  by 
  Dohrn 
  ; 
  it 
  is 
  rather 
  shorter, 
  

   yellowish, 
  with 
  a 
  white 
  zone 
  at 
  the 
  upper 
  part 
  of 
  the 
  whorls, 
  and 
  

   another 
  round 
  the 
  middle 
  of 
  the 
  body-whorl. 
  But 
  the 
  principal 
  

   difference 
  lies 
  in 
  the 
  greater 
  coarseness 
  of 
  the 
  spiral 
  ridges 
  : 
  of 
  

   these 
  the 
  upper 
  volutions 
  have 
  three, 
  the 
  penultimate 
  four, 
  and 
  the 
  

   last 
  about 
  twenty-four 
  ; 
  the 
  uppermost 
  beneath 
  the 
  suture 
  is 
  a 
  

   duplex 
  one, 
  and 
  those 
  upon 
  the 
  body-whorl 
  become 
  gradually 
  finer 
  

   towards 
  the 
  anterior 
  end. 
  The 
  five 
  plaits 
  on 
  the 
  columella 
  gradually 
  

   diminish 
  in 
  size 
  until 
  the 
  lowermost 
  is 
  almost 
  obsolete, 
  indeed 
  in 
  

   one 
  specimen 
  in 
  the 
  Cumingian 
  collection 
  it 
  is 
  entirely 
  wanting. 
  

   The 
  grooves 
  between 
  the 
  ridges 
  are 
  crenulated 
  by 
  elevated 
  lines 
  of 
  

   growth, 
  which 
  in 
  the 
  specimen 
  from 
  Port 
  Molle 
  are 
  particularly 
  

   strongly 
  developed. 
  

  

  43. 
  Mitra 
  (Turricula) 
  corrugata. 
  

  

  Mitra 
  corrugata, 
  Lamarck 
  ; 
  Reeve, 
  Conch. 
  Icon. 
  figs. 
  57 
  a, 
  b 
  ; 
  Kiener, 
  

   Coq. 
  Viv. 
  Yil 
  22. 
  tig. 
  67; 
  Sowerby, 
  Tlies. 
  Conch, 
  vol. 
  iv. 
  pi. 
  354. 
  

   figs. 
  41, 
  42. 
  

  

  Hah. 
  Port 
  !Molle, 
  on 
  the 
  beach. 
  

  

  A 
  specimen 
  from 
  the 
  above 
  locality, 
  of 
  immature 
  growth, 
  is 
  peculiar 
  

   in 
  wanting 
  the 
  fourth 
  small 
  lowermost 
  fold 
  on 
  the 
  columella* 
  usually 
  

   met 
  with 
  in 
  this 
  species, 
  in 
  other 
  respects 
  according 
  very 
  closely 
  

   with 
  the 
  form 
  depicted 
  by 
  Reeve's 
  figure 
  57 
  h. 
  

  

  