﻿166 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  M.C. 
  Off 
  Charbar, 
  comraon, 
  40 
  fathoms. 
  

  

  A 
  constant 
  species, 
  fairly 
  widely 
  distributed, 
  gregarious 
  and 
  

   plentiful 
  where 
  found 
  ; 
  easily 
  recognizable, 
  being 
  small, 
  of 
  lozenge 
  

   shape, 
  white, 
  with 
  a 
  single 
  spiral 
  keel, 
  moderately 
  ribbed 
  longi- 
  

   tudinally, 
  and 
  crossed 
  with 
  apical 
  lines, 
  apical 
  whorls 
  vitreous, 
  

   globular, 
  swollen, 
  and 
  proportionately 
  large. 
  

  

  71. 
  Mangilia 
  albata 
  (Sm.). 
  (PI. 
  IX, 
  Fig. 
  3.) 
  

  

  Fleurotonia 
  ( 
  — 
  ?) 
  albata, 
  E. 
  A. 
  Smith, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  v, 
  

   vol. 
  X, 
  1882, 
  p. 
  210. 
  

  

  P.G. 
  Heiijam 
  Ishind, 
  10 
  fathoms 
  (1906); 
  Linjah 
  Anchorage, 
  

   7-15 
  fathoms, 
  rarely; 
  Mussandam, 
  55 
  fathoms; 
  Gulf 
  of 
  Oman, 
  

   Muscat. 
  

  

  M.C. 
  Charbar, 
  10 
  fathoms. 
  

  

  A 
  small 
  hexagonal 
  species, 
  local, 
  but 
  frequent 
  where 
  it 
  does 
  

   occur. 
  There 
  was, 
  however, 
  no 
  sign 
  of 
  it 
  in 
  the 
  prolific 
  dredging 
  

   at 
  156 
  fathoms 
  in 
  the 
  Gulf 
  of 
  Oman, 
  though 
  quisquilia, 
  its 
  ally, 
  

   occurred 
  there 
  commonly. 
  The 
  author 
  of 
  the 
  species 
  experienced 
  

   doubts 
  as 
  to 
  its 
  position, 
  but 
  I 
  i\\\\\\i 
  Mangilia 
  is 
  the 
  best 
  genus 
  for 
  its 
  

   reception, 
  at 
  all 
  events 
  until 
  the 
  wished-for 
  revision 
  of 
  this 
  vast 
  

   family 
  can 
  be 
  undertaken. 
  The 
  nuclear 
  whorls 
  are 
  smooth, 
  white, 
  

   third 
  whorl 
  centrally 
  angled. 
  

  

  72. 
  Mangilia 
  albolabiata 
  (Sm.). 
  (PI. 
  VIII, 
  Fig. 
  13.) 
  

  

  Pleurotoma 
  (Mangilia?) 
  albolabiata, 
  K. 
  A. 
  Smith, 
  Ann. 
  Mag. 
  Nat. 
  

   Hist., 
  ser. 
  v," 
  vol. 
  xiv, 
  1882, 
  p. 
  321. 
  

  

  P.G. 
  Coll. 
  Pelly 
  (Type 
  in 
  the 
  Pritish 
  Museum). 
  Also 
  off 
  Henjam 
  

   Island, 
  15-20 
  fathoms, 
  mud. 
  

  

  M.C. 
  Charbar. 
  

  

  I. 
  Karachi 
  ; 
  Bombay 
  (Abercrombie), 
  in 
  shell 
  sand, 
  mostly 
  worn. 
  

  

  b. 
  chilosema, 
  Mel 
  v. 
  

  

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

   1899, 
  p. 
  85, 
  pi. 
  i, 
  f. 
  3. 
  

  

  M.C. 
  Charbar, 
  40 
  fathoms, 
  and 
  at 
  several 
  places 
  off 
  the 
  coast 
  of 
  

   Baluchistan, 
  at 
  10-15 
  fathoms. 
  

  

  I. 
  Ivaraclii, 
  exceedingly 
  abundant 
  among 
  loose 
  rocks, 
  sand, 
  and 
  

   mud 
  at 
  low 
  tide. 
  

  

  The 
  affinities 
  of 
  this 
  species 
  and 
  its 
  variety 
  lie 
  with 
  the 
  New 
  

   Caledonian 
  2[. 
  himerta 
  and 
  himerodes, 
  Melv. 
  & 
  St., 
  and 
  likewise 
  

   with 
  M. 
  rauquelini, 
  Payr., 
  from 
  the 
  Mediterranean 
  region. 
  Typical 
  

   alholabiafa 
  measures 
  45 
  mm. 
  longitudinally, 
  as 
  against 
  7 
  to 
  9 
  or 
  even 
  

   more 
  in 
  the 
  variety. 
  As 
  will 
  be 
  seen 
  by 
  the 
  figure, 
  the 
  outer 
  lip 
  of 
  

   the 
  type, 
  though 
  apparently 
  mature, 
  is 
  hardly 
  expanded, 
  and 
  the 
  

   sinus 
  is 
  obscure. 
  Chilosema, 
  on 
  the 
  other 
  hand, 
  as 
  originally 
  

   described, 
  has 
  both 
  these 
  characters 
  well 
  portrayed 
  ; 
  a 
  certain 
  

   angularity 
  likewise 
  is 
  conspicuous 
  in 
  the 
  upper 
  part 
  of 
  each 
  whorl. 
  

  

  