﻿MELVILL 
  : 
  TURIIIDJE 
  OF 
  THE 
  PERSIAN 
  GULF, 
  ETC. 
  165 
  

  

  Genus 
  CLAVATULA, 
  Lamarck, 
  1801. 
  

   68. 
  Clavatula 
  bimarginata 
  (Lanik.). 
  

  

  JPleurotoma 
  bimarginata, 
  Lamarck, 
  Anim. 
  sans 
  Vert., 
  vol. 
  vii, 
  1822, 
  

  

  p. 
  83. 
  

   ,, 
  ,, 
  Reeve, 
  Conch. 
  Icon., 
  vol. 
  i, 
  1843, 
  pi. 
  v, 
  f. 
  34. 
  

  

  P.G. 
  Gulf 
  of 
  Oman, 
  Jask 
  beach. 
  

  

  As 
  Lovell 
  Reeve 
  aptly 
  remarks, 
  the 
  salmon-pink 
  hue 
  of 
  this 
  species 
  

   is 
  unique 
  in 
  the 
  genus. 
  

  

  Tlie 
  west 
  and 
  south 
  coasts 
  of 
  Africa 
  are 
  the 
  usual 
  habitats 
  of 
  the 
  

   group 
  of 
  nearly 
  allied 
  species 
  to 
  wliich 
  this 
  belongs. 
  Try 
  on 
  ^ 
  indeed 
  

   merges 
  them 
  all 
  under 
  the 
  collective 
  name 
  of 
  imiricata, 
  Lamk. 
  

  

  69. 
  Clavatula 
  navarchus, 
  Melv. 
  & 
  St. 
  

  

  Pleiirotoma 
  {Genmiula) 
  ?iavarcJms 
  (Melvill 
  t&; 
  Standen), 
  Ann. 
  Mag. 
  Nat. 
  

  

  Hist., 
  ser. 
  vii, 
  vol. 
  xii, 
  1903, 
  p. 
  310, 
  pi. 
  xxi, 
  f. 
  15. 
  

   Clavatula 
  navarchm, 
  E. 
  A. 
  Smith, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  vii, 
  

   vol. 
  xviii, 
  1906, 
  p. 
  160. 
  

  

  P.G. 
  Gulf 
  of 
  Oman, 
  lat. 
  25° 
  19' 
  N., 
  long. 
  58° 
  10' 
  E., 
  140 
  fathoms. 
  

   Off 
  Jask 
  at 
  175 
  fathoms. 
  

  

  M.C. 
  Between 
  Charbar 
  and 
  Jask, 
  dredged 
  at 
  90-200 
  fathoms, 
  in 
  

   company 
  with 
  Conorbis 
  coromandelicus, 
  Sm., 
  and 
  Rostellaria 
  delicatula, 
  

   Nevill. 
  

  

  This 
  magnificent 
  species 
  is 
  now, 
  we 
  consider, 
  placed 
  in 
  its 
  correct 
  

   genus 
  and 
  sequence. 
  One 
  specimen 
  is 
  3 
  inches 
  in 
  length. 
  Excepting 
  

   in 
  size, 
  theie 
  seems 
  no 
  variation. 
  It 
  also 
  was 
  dredged 
  by 
  the 
  

   Investigator 
  Expedition, 
  at 
  Station 
  258, 
  west 
  of 
  Travancore, 
  

   102 
  fathoms, 
  sand. 
  And 
  Mr. 
  E. 
  A. 
  Smith 
  remarks 
  that 
  "the 
  operculum 
  

   is 
  rather 
  thick, 
  semi-oval, 
  having 
  one 
  side 
  straight 
  and 
  the 
  outer 
  

   margin 
  curved. 
  The 
  nucleus 
  is 
  at 
  the 
  middle 
  of 
  the 
  straight 
  edge, 
  

   the 
  outer 
  surface 
  being 
  finely 
  concentrically 
  striated, 
  and 
  the 
  under- 
  

   side 
  with 
  a 
  raised 
  edge, 
  with 
  some 
  concentric 
  wrinkles 
  in 
  the 
  

   middle".^ 
  

  

  III. 
  Sub-family 
  Mangilin^. 
  

  

  Genus 
  MANGILIA, 
  Risso, 
  1826.^ 
  

  

  70. 
  Mangilia 
  adamantina, 
  Melv. 
  

  

  Mangilia 
  adamantina, 
  Melvill, 
  Proc. 
  Malac. 
  Soc. 
  Lond., 
  vol. 
  vi, 
  1904, 
  

   p. 
  165, 
  pi. 
  X, 
  f. 
  18. 
  

   P.G. 
  Mussandam, 
  55 
  fathoms. 
  Henjam 
  Island. 
  Gulf 
  of 
  Oman, 
  

   lat. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54' 
  E., 
  156 
  fathoms; 
  and 
  lat. 
  24° 
  54' 
  N., 
  

   long. 
  57° 
  55' 
  N., 
  205 
  fathoms, 
  mud. 
  

  

  1 
  Man. 
  Conch., 
  vol. 
  vi, 
  1884, 
  p. 
  229. 
  

  

  ^ 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  Vll, 
  vol. 
  xviii, 
  1906, 
  p. 
  100. 
  

  

  ^ 
  This 
  genus 
  was 
  named 
  by 
  Risso 
  after 
  Mangili, 
  the 
  Italian 
  zoologist. 
  He 
  

  

  unfortunately 
  wrote 
  it 
  at 
  first 
  Mangelia, 
  afterwards 
  correcting 
  this 
  and 
  

  

  giving 
  it 
  as 
  now 
  usually 
  spelt. 
  

  

  