﻿MELVILL 
  : 
  PYEAMIDELLID^ 
  OF 
  THE 
  PERSIAN 
  GULP, 
  ETC. 
  177 
  

  

  ■ 
  Styloptygma 
  cometes, 
  n.sp. 
  PL 
  IV, 
  Fig. 
  3. 
  

  

  S. 
  testa 
  obscure 
  rimata, 
  cylindrica, 
  superne 
  multum 
  attenuato- 
  

   caudata, 
  lacteo-vitrea, 
  subpellucida, 
  tenuissima, 
  perfragili, 
  anfractibus 
  

   ad 
  13, 
  quorum 
  tres 
  apicales 
  bulbosi, 
  clare 
  vitrei, 
  his 
  septem 
  proximis, 
  

   apud 
  suturas 
  anguste 
  sulcatis, 
  fere 
  rectis, 
  tribus 
  ultimis 
  ventricosulis, 
  

   omnibus 
  omnino 
  Isevibus, 
  apertura 
  parva, 
  subrotunda, 
  labro 
  tenui, 
  

   columella 
  uniplicata. 
  Long. 
  6, 
  lat. 
  l"50mm. 
  

  

  P 
  Sah. 
  — 
  Karachi. 
  

  

  A 
  very 
  delicate 
  and 
  fragile 
  shell 
  ; 
  indeed, 
  while 
  the 
  type 
  was 
  being 
  

   examined 
  microscopically 
  it 
  was 
  broken, 
  the 
  opportunity, 
  however, 
  

   being 
  then 
  taken 
  to 
  examine 
  the 
  internal 
  coluniellar 
  arrangement, 
  it 
  

   was 
  found 
  to 
  be 
  strongly 
  once-plaited 
  almost 
  to 
  the 
  apex. 
  The 
  seven 
  

   mid- 
  whorls 
  are 
  almost 
  straight 
  and 
  uniform, 
  the 
  three 
  lowest 
  ventricose 
  

   and 
  impressed 
  suturally. 
  

  

  Act^opyeamis 
  amosna 
  (A. 
  Adams). 
  

   Monoptygyna 
  amoena, 
  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc, 
  1851, 
  p. 
  223. 
  

   Leucotina 
  amoena, 
  A. 
  Adams 
  : 
  Melvill 
  & 
  Standen, 
  Proc. 
  Zool. 
  Soc, 
  

  

  1901, 
  p. 
  452. 
  

   ActcBopyramis 
  amoena, 
  Tryon, 
  Man. 
  Conch., 
  vol. 
  viii, 
  p. 
  312, 
  pi. 
  Ixxiv, 
  

   fig. 
  41. 
  

   Hah. 
  — 
  P.G. 
  and 
  M.C. 
  No 
  exact 
  record. 
  

   I. 
  Bombay 
  (Abercrombie). 
  

  

  It 
  is 
  often 
  difficult 
  to 
  differentiate 
  generically 
  between 
  Leucotina 
  and 
  

   Actceopyramis. 
  I 
  still 
  think 
  Leucotina 
  Jashensis, 
  Melvill, 
  from 
  the 
  

   Gulf 
  of 
  Oman, 
  of 
  that 
  genus 
  ; 
  but 
  now 
  transfer 
  here, 
  with 
  some 
  

   hesitation, 
  one 
  or 
  two 
  other 
  species. 
  

  

  Act^opyeamis 
  casta 
  (A. 
  Adams). 
  

   Chrysallida 
  casta, 
  A. 
  Adams, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  vol. 
  viii, 
  

  

  p. 
  301, 
  1861. 
  

   ActcBopyramis 
  casta 
  (A. 
  Adams), 
  Tryon, 
  Man. 
  Conch., 
  vol. 
  viii, 
  p. 
  314, 
  

   pi. 
  Ixxiv, 
  fig. 
  45. 
  

   Bah.—'P.a. 
  Bahrein 
  Is. 
  

  

  I. 
  Karachi. 
  Amongst 
  weed, 
  mud, 
  and 
  loose 
  stones 
  at 
  low 
  tide. 
  

   Bombay 
  (Abercrombie). 
  

  

  AcTiEOPYEAMis 
  PULVA 
  (A. 
  Adams). 
  

   Monoptyyma 
  fulva, 
  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc, 
  1851, 
  p, 
  222. 
  

   ActcBopyramis 
  fiilva 
  (A. 
  Adams), 
  Tryon, 
  Man. 
  Conch., 
  vol. 
  viii, 
  p. 
  313, 
  

   pi. 
  Ixxiv, 
  fig. 
  42. 
  

   ffab. 
  — 
  I. 
  Bombay 
  (Abercrombie). 
  

  

  Karachi. 
  Amongst 
  dredged 
  shingle. 
  Dead 
  specimens 
  only, 
  but 
  in 
  

   very 
  fine 
  condition. 
  

  

  ACT^OPYEAMIS 
  GAVISA 
  (Melvill). 
  

  

  Myonia 
  gavisa, 
  Melvill, 
  Proc. 
  Malac 
  Soc, 
  vol. 
  ii, 
  p. 
  112, 
  pi. 
  viii, 
  fig. 
  26. 
  

  

  Mab. 
  — 
  I. 
  Bombay 
  (Abercrombie). 
  

  

  This 
  may, 
  perhaps, 
  be 
  a 
  Leucotina. 
  The 
  type 
  is 
  not 
  in 
  very 
  first- 
  

   class 
  condition. 
  

  

  