﻿MELVILI. 
  : 
  TURKID.T'^ 
  OF 
  THE 
  PKKSIAN 
  GULF, 
  KTC. 
  167 
  

  

  Still, 
  the 
  forms 
  occurring 
  so 
  iinich 
  tof^etlier, 
  with 
  iutermediatos, 
  

   compel 
  the 
  grouping 
  together 
  of 
  two 
  extreme 
  forms. 
  

  

  Tlie 
  dull 
  reddish 
  central 
  lateral 
  and 
  dorsal 
  interrupted 
  hand 
  is 
  

   a 
  guide 
  to 
  tlie 
  species. 
  Lastly, 
  with 
  regard 
  to 
  tlie 
  nuclear 
  whorls, 
  

   the 
  first 
  two 
  are 
  smooth 
  and 
  white, 
  tlie 
  third 
  sliglitly 
  ventricose 
  and 
  

   cancellato. 
  This 
  would 
  hetokeii 
  alliance 
  with 
  M. 
  gracilenta, 
  Keeve, 
  

   its 
  variety 
  /?or^m, 
  Srn., 
  etc. 
  

  

  73. 
  Manoilia 
  ALTrcosTATA, 
  Sowb. 
  

   Manffilia 
  alticoxtata, 
  O. 
  H. 
  Sowerby, 
  Troc. 
  Malac. 
  Soc. 
  Lond., 
  vol. 
  ii, 
  

   1896, 
  p. 
  31, 
  pi. 
  iii, 
  f. 
  16. 
  

  

  r.U. 
  Henjam 
  Island, 
  10 
  fatlioms. 
  Khor 
  Khawi, 
  12 
  fathoms, 
  

   coral 
  sand 
  (March 
  19, 
  1909). 
  

  

  The 
  specimens 
  from 
  the 
  first 
  locality 
  agree 
  with 
  those 
  received 
  "ex 
  

   auctore 
  " 
  from 
  St. 
  Vincent's 
  Gulf, 
  South 
  Australia. 
  It 
  is 
  nearest 
  to 
  

   31. 
  ichthys, 
  Melv., 
  but 
  far 
  more 
  elongate, 
  9-wliorled 
  in 
  the 
  largest 
  

   example 
  examined. 
  The 
  type 
  is 
  pure 
  white 
  ; 
  but 
  from 
  Khor 
  Khawi 
  

   came 
  an 
  interesting 
  variety 
  with 
  spiral 
  interrupted 
  brown 
  band 
  in 
  the 
  

   interstices 
  l)etween 
  the 
  costa) 
  of 
  the 
  two 
  last 
  whorls, 
  and 
  on 
  the 
  body- 
  

   whorl, 
  in 
  addition 
  to 
  this, 
  a 
  secoiul 
  central 
  conspicuous 
  brown 
  band, 
  

   better 
  defined 
  than 
  the 
  others. 
  This 
  might 
  be 
  called 
  war./asciala. 
  

  

  74. 
  Manoilia 
  anakitiima, 
  Melv. 
  

  

  Ifangilia 
  anarithma, 
  Melvill, 
  I'roc. 
  Malac. 
  Soc. 
  Lond., 
  vol. 
  x, 
  1912, 
  

   p. 
  251, 
  pi. 
  xi, 
  f. 
  12. 
  

  

  M.C. 
  Charbar, 
  40-3 
  fathoms. 
  

  

  The 
  ribs 
  are 
  more 
  rounded 
  and 
  thicker 
  than 
  is 
  the 
  case 
  with 
  

   M. 
  zebuensis, 
  Reeve, 
  which 
  seems 
  its 
  near 
  ally. 
  The 
  two 
  apical 
  

   whorls 
  arc 
  smooth 
  and 
  white, 
  the 
  third 
  longitudinally 
  lirulate, 
  sinus 
  

   hardly 
  expressed. 
  Local, 
  but 
  common 
  where 
  it 
  occurs. 
  

  

  75. 
  ^Iangilia 
  apollinea, 
  Melv. 
  

  

  Mangilia 
  apollinea, 
  Melv., 
  Proc. 
  Malac. 
  Soc. 
  Lond., 
  vol. 
  vi, 
  1904, 
  

   pi. 
  x, 
  f. 
  20. 
  

  

  V.(j. 
  Muscat, 
  10-20 
  fathoms. 
  Henjam 
  Island, 
  10 
  fathoms. 
  Gulf 
  

   of 
  Oman, 
  hit. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54'' 
  E., 
  156 
  fathoms. 
  

  

  M.(J. 
  Charhar, 
  40 
  fathoms. 
  

  

  Allied 
  nearly 
  to 
  3f. 
  infulala, 
  Ilodley, 
  from 
  Australian 
  waters.^ 
  

   3[. 
  polila, 
  Hinds, 
  ehur, 
  and 
  opalus, 
  both 
  of 
  lleeve, 
  are 
  likewise 
  of 
  the 
  

   same 
  alliance. 
  

  

  The 
  single 
  conspicuous 
  central 
  spiral 
  keel, 
  crossing 
  the 
  ribs 
  at 
  right 
  

   angles, 
  and 
  bearing 
  a 
  beaded 
  gemmule 
  at 
  each 
  point 
  of 
  junction, 
  is 
  

   a 
  distinguishing 
  feature 
  of 
  this 
  very 
  beautiful 
  little 
  3fangilta. 
  The 
  

   surface 
  is 
  otherwise 
  completely 
  smooth 
  and 
  shining. 
  The 
  distribution 
  

   is 
  mainly 
  identical 
  witli 
  tliat 
  of 
  3r. 
  adamantma, 
  Melv. 
  ; 
  the 
  apical 
  

   whorls 
  are 
  much 
  smaller 
  than 
  in 
  that 
  species, 
  though 
  equally 
  smooth 
  

   and 
  white. 
  Dredged 
  during 
  the 
  "Siboga" 
  expedition 
  at 
  Great 
  Kei 
  

   Island 
  (Schcpman). 
  

  

  ^ 
  Proc. 
  Linn. 
  Soc. 
  New 
  S. 
  Wales, 
  vol. 
  xxxiv, 
  1909, 
  p. 
  457, 
  pi. 
  xliv, 
  f. 
  92. 
  

  

  