﻿178 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  description, 
  and 
  since 
  I 
  find 
  the 
  two 
  forms 
  together, 
  though 
  clarisculpta 
  

   is 
  very 
  mucli 
  tlie 
  commoner 
  in 
  the 
  region 
  we 
  ai"e 
  treating 
  of, 
  I 
  am 
  

   inclined 
  to 
  agree 
  with 
  the 
  authors, 
  and 
  class 
  my 
  species 
  as 
  a 
  good 
  

   variety. 
  The 
  two 
  apical 
  whorls 
  in 
  hoth 
  this 
  and 
  the 
  typical 
  species 
  

   are 
  white, 
  smooth, 
  somewhat 
  vitreous. 
  

  

  111. 
  Mangilia 
  terpnisma, 
  Melv. 
  & 
  St. 
  

   Mangilia 
  terpnisma, 
  Melvill 
  & 
  Standen, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1901, 
  

   p. 
  443, 
  pi. 
  xxiv, 
  f. 
  8. 
  

  

  P.G. 
  Gulf 
  of 
  Oman, 
  Muscat, 
  15 
  fatlioms. 
  Lat. 
  24° 
  58' 
  N., 
  

   long. 
  56° 
  54' 
  E., 
  156 
  fathoms. 
  Also 
  lat. 
  25° 
  6' 
  N., 
  long. 
  60° 
  39' 
  E., 
  

   40 
  fathoms, 
  and 
  contiguous 
  soundings, 
  vide 
  original 
  description. 
  

  

  Fine 
  live 
  examples 
  are 
  tinged 
  with 
  brown-red 
  round 
  the 
  columella 
  

   and 
  outer 
  lip. 
  It 
  seems 
  locally 
  abundant. 
  It 
  may 
  by 
  some 
  be 
  

   considered 
  a 
  Glyphostoma, 
  but 
  without 
  much 
  reason. 
  M. 
  prjcnochila, 
  

   Melv., 
  is 
  the 
  nearest 
  ally, 
  perhaps, 
  indeed, 
  a 
  marked 
  variety 
  with 
  

   abnormally 
  thickened 
  labrum. 
  It 
  was 
  dredged 
  off 
  Timor 
  in 
  the 
  

   Siboga 
  expedition. 
  

  

  112. 
  Mangilia 
  thalia 
  (Melv. 
  & 
  St.). 
  

  

  Clathurella 
  thalia, 
  Melvill 
  & 
  Standen, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1901, 
  

   p. 
  445, 
  pi. 
  xxiv, 
  f. 
  10. 
  

  

  M.C. 
  Charbar, 
  7 
  fathoms. 
  

  

  Very 
  nearly 
  allied 
  to 
  portia, 
  Sm. 
  = 
  gracilenia, 
  Reeve, 
  and 
  perhaps 
  

   it 
  had 
  better 
  be 
  relegated 
  to 
  a 
  variety 
  of 
  that 
  protean 
  form. 
  It 
  differs 
  

   in 
  its 
  more 
  graceful, 
  fusiform 
  shape, 
  in 
  the 
  ochraceous 
  colour, 
  with 
  

   brown 
  tinge 
  around 
  the 
  centre 
  of 
  the 
  whorls, 
  and 
  in 
  greater 
  flexuosity 
  

   of 
  costse, 
  the 
  spiral 
  lirse 
  at 
  the 
  point 
  of 
  junction 
  with 
  the 
  ribs 
  

   being 
  gemmulate 
  ; 
  the 
  canal 
  is 
  shorter 
  than 
  generally 
  obtains 
  in 
  

   gracilenta, 
  but 
  we 
  require 
  larger 
  suites 
  of 
  specimens 
  before 
  the 
  

   question 
  can 
  be 
  actually 
  decided. 
  

  

  113. 
  Mangilia 
  theskeloides, 
  Melv. 
  

  

  Mangilia 
  thesJceloides, 
  Melvill, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  vii, 
  vol. 
  iv, 
  

   1889, 
  p. 
  87, 
  pi. 
  i, 
  f. 
  6. 
  

  

  I. 
  Karachi. 
  

  

  As 
  stated 
  in 
  the 
  original 
  description, 
  this 
  species 
  differs 
  much 
  from 
  

   its 
  congeners 
  in 
  the 
  Persian 
  Gulf 
  area, 
  and 
  is 
  more 
  nearly 
  allied 
  to 
  

   certain 
  New 
  Caledonian 
  species, 
  e.g. 
  lella 
  and 
  interrupta, 
  Reeve, 
  or 
  

   theskela, 
  Melv. 
  & 
  St. 
  

  

  114. 
  Mangilia 
  townsendi, 
  Sowb. 
  

   Mangilia 
  toionxendi, 
  G. 
  B. 
  Sowerby, 
  Proc. 
  Malac. 
  Soc. 
  Lond., 
  vol. 
  i, 
  

   1895, 
  p. 
  278, 
  pi. 
  xviii, 
  f. 
  1, 
  2. 
  

  

  P.G. 
  Henjam 
  Island, 
  Gulf 
  of 
  Oman. 
  Especially 
  fine 
  at 
  Jask. 
  

  

  M.C. 
  Charbar, 
  Gwadur, 
  Ormara, 
  Astola 
  Island, 
  etc. 
  ; 
  met 
  with 
  

   generally 
  along 
  the 
  coast 
  from 
  low- 
  water 
  mark 
  to 
  15 
  fathoms, 
  on 
  

   muddy 
  sand. 
  

  

  The 
  author 
  compares 
  this 
  beautiful 
  species 
  to 
  M. 
  attenuata, 
  Mont., 
  

   a 
  European 
  species. 
  The 
  colour 
  described 
  happily 
  as 
  " 
  griseo- 
  

   virescens 
  " 
  is 
  peculiar. 
  M. 
  gaUgensis, 
  Melv., 
  is 
  the 
  only 
  near 
  ally 
  in 
  

   the 
  seas 
  now 
  treated 
  of. 
  

  

  