﻿MELVILL 
  : 
  TUEEID^ 
  OF 
  THE 
  PEESIAN 
  GULF, 
  ETC. 
  143 
  

  

  2. 
  TuERis 
  ALBiNA 
  (Lam.). 
  

   Pleurotoma 
  albma, 
  Lamarck, 
  Anim. 
  sans 
  Vert., 
  vol. 
  vii, 
  1822, 
  p. 
  96. 
  

   ,, 
  ,, 
  lleeve, 
  Conch. 
  Icon., 
  vol. 
  i, 
  1843, 
  pi. 
  ix, 
  f. 
  77. 
  

  

  P.G. 
  Gulf 
  of 
  Oman. 
  Off 
  Muscat, 
  30 
  fathoms. 
  

   I. 
  Lat. 
  18° 
  43' 
  N., 
  long. 
  71° 
  41' 
  E. 
  

  

  Keeve 
  remarks 
  upon 
  the 
  " 
  squareness 
  and 
  equidistant 
  arrangement 
  

   of 
  the 
  spots 
  which 
  ornament 
  the 
  flattened 
  keel 
  formed 
  hy 
  the 
  filling 
  

   up 
  of 
  the 
  labral 
  slit 
  ". 
  The 
  figured 
  specimen 
  was 
  dredged 
  by 
  

   Surgeon 
  li. 
  Brinsley 
  Hinds, 
  II. 
  N., 
  in 
  the 
  Island 
  of 
  Cerat, 
  Moluccas. 
  

  

  3. 
  TURRIS 
  INDICA, 
  Bolt. 
  

  

  Ihrri's 
  indica, 
  Bolten, 
  Mus. 
  Boltenianum, 
  1798, 
  p. 
  124, 
  No. 
  1594. 
  

   Fleurotoma 
  marmorata, 
  Lamarck, 
  Anim. 
  sans 
  Vert., 
  vol. 
  vii, 
  1822, 
  

  

  p. 
  95. 
  

   ,, 
  ,, 
  Reeve, 
  Conch. 
  Icon., 
  vol. 
  i, 
  1843, 
  pi. 
  iii, 
  f. 
  21, 
  «, 
  i. 
  

  

  Lophiotoma 
  mannorata, 
  Casey, 
  Trans. 
  Acad. 
  Sci. 
  St. 
  Louis, 
  vol. 
  xiv, 
  

  

  1904, 
  p. 
  130. 
  

  

  P.O. 
  Thairi, 
  Mussandam, 
  east 
  side, 
  30 
  fathoms 
  (1912). 
  Malcolm 
  

   Inlet 
  (Kubbatt 
  Ghazira), 
  giant 
  example, 
  long. 
  94 
  mm., 
  dredged 
  at 
  

   55 
  fathoms. 
  From 
  this 
  latter 
  place 
  a 
  shell 
  was 
  procured 
  that 
  may 
  

   prove 
  a 
  hybrid 
  indica 
  X 
  acuta, 
  

  

  M.C. 
  Not 
  uncommon, 
  often 
  washed 
  ashore. 
  

  

  I. 
  Bombay. 
  

  

  A 
  variable 
  species, 
  extreme 
  forms 
  being 
  happily 
  figured 
  by 
  lleeve. 
  

   Distributed 
  over 
  the 
  Eastern 
  Tropics 
  very 
  widely, 
  ranging 
  from 
  the 
  

   Bed 
  Sea 
  to 
  Australia 
  and 
  Polynesia, 
  and 
  as 
  far 
  north 
  as 
  Ja])an, 
  

   I 
  do 
  not 
  agree 
  with 
  Tryon 
  (Man. 
  Conch., 
  vol. 
  vi, 
  1884, 
  p. 
  165) 
  that 
  

   hastula, 
  Reeve 
  (Conch. 
  Icon., 
  vol. 
  i, 
  1843, 
  pi. 
  xvii, 
  f. 
  139), 
  is 
  the 
  

   young 
  of 
  this 
  species. 
  

  

  From 
  the 
  Cargados 
  Isles 
  came 
  interesting 
  albino 
  specimens 
  (Stanley 
  

   Gardiner 
  Expedition).' 
  These 
  are 
  probably 
  the 
  PL 
  hceloivi, 
  Sowb., 
  and 
  

   have 
  the 
  appearance 
  of 
  having 
  been 
  dredged 
  at 
  a 
  considerable 
  depth. 
  

  

  I 
  may 
  add 
  that 
  for 
  this 
  species 
  and 
  acuta, 
  Bolt, 
  (as 
  well 
  as 
  

   leucotropis, 
  Ad. 
  & 
  Rve., 
  jickeli, 
  Weink., 
  iinedo, 
  Vii., 
  and 
  virgo, 
  

   Lara.), 
  Dr. 
  Thomas 
  L. 
  Casey 
  proposed 
  a 
  new 
  genus, 
  Lophiotoma, 
  laying 
  

   stress 
  upon 
  the 
  stouter 
  form, 
  abbreviate, 
  with 
  straighter 
  beak, 
  more 
  

   acutely 
  elevated 
  and 
  less 
  close-set 
  spiral 
  carina, 
  and 
  with 
  deep 
  anal 
  

   sinus 
  formed 
  centrally 
  o?i, 
  and 
  not 
  behind, 
  the 
  peripheral 
  keel, 
  the 
  

   latter 
  being 
  more 
  strongly 
  elevated 
  and 
  usually 
  sub-duplex. 
  

  

  Possessing 
  all 
  these 
  species, 
  I 
  have 
  closely 
  compared 
  their 
  

   structure 
  with 
  those 
  few 
  still 
  allowed 
  a 
  place 
  in 
  the 
  typical 
  genus 
  

   Tiirris, 
  the 
  result 
  being 
  that 
  I 
  prefer 
  to 
  consider 
  them 
  all 
  so 
  

   closely 
  allied 
  that 
  it 
  seems 
  disadvantageous 
  to 
  separate 
  them 
  even 
  

   subgenerically. 
  The 
  nepionic 
  whorls 
  are 
  confessedly 
  identical 
  ; 
  it 
  

   is 
  simply 
  a 
  question 
  of 
  the 
  carinte 
  being 
  more 
  pronounced 
  in 
  such 
  

   a 
  species 
  as 
  acuta, 
  for 
  instance 
  ; 
  the 
  same 
  character 
  of 
  marking 
  or 
  

   painting 
  is 
  to 
  be 
  found, 
  and 
  to 
  a 
  great 
  extent 
  the 
  same 
  build 
  and 
  

   contour 
  generally. 
  

  

  ' 
  Trans. 
  Linn. 
  Soc. 
  Lond., 
  ser. 
  ii, 
  Zoology, 
  vol. 
  xiii, 
  1909, 
  p. 
  118. 
  

  

  