﻿MELVILL 
  : 
  PYEAMIDELLID^ 
  OF 
  THE 
  PERSIAN 
  GULF, 
  ETC. 
  179 
  

  

  as 
  distinct 
  from 
  Agatha, 
  A. 
  Ad., 
  is 
  open 
  to 
  some 
  doubt. 
  And 
  also, 
  

   whether 
  the 
  species 
  of 
  these 
  genera, 
  with 
  Myonia, 
  A. 
  Ad. 
  (in 
  part), 
  

   are 
  best 
  located 
  here 
  or 
  among 
  the 
  Acteonidte, 
  is 
  uncertain. 
  In 
  my 
  

   opinion, 
  despite 
  the 
  very 
  oblique 
  columellar 
  plication, 
  Agatha, 
  at 
  all 
  

   events, 
  is 
  best 
  placed 
  near 
  Actceopyramis. 
  

  

  Elusa 
  brunneomaculata, 
  Melvill. 
  PL 
  IV, 
  Fig. 
  6. 
  

  

  Elusa 
  hrunneomaculata, 
  Melvill, 
  Mem. 
  Manch. 
  Soc, 
  jSTo. 
  7, 
  p. 
  13, 
  

   pi. 
  vi, 
  fig. 
  5, 
  1897. 
  

  

  Hab. 
  — 
  P.Gr. 
  Dredged 
  in 
  5 
  fathoms, 
  sand 
  and 
  mud. 
  Gulf 
  of 
  Oman 
  ; 
  

   Malcolm 
  Inlet 
  (Kubbatt 
  Ghazira), 
  24 
  fathoms. 
  

  

  M.C. 
  Charbar, 
  a 
  few 
  specimens 
  only. 
  

  

  I. 
  Karachi, 
  also 
  rare. 
  

  

  This 
  is 
  a 
  remarkably 
  isolated 
  form, 
  and 
  one 
  of 
  the 
  most 
  select 
  of 
  

   the 
  order. 
  The 
  curious 
  mahogany-coloured 
  dashes 
  on 
  the 
  pure-white 
  

   ground 
  are 
  very 
  characteristic, 
  and 
  likewise 
  the 
  fi^rm 
  semi-immersed 
  

   ribs, 
  and 
  most 
  delicate 
  interstitial 
  spiral 
  striations. 
  I 
  prefer, 
  at 
  the 
  

   present 
  opportunity, 
  giving 
  Elusa 
  and 
  also 
  Syrnola 
  generic 
  rank, 
  

   though 
  perhaps 
  it 
  is 
  more 
  correct 
  to 
  consider 
  them 
  subgeneric 
  only 
  to 
  

   Pyramidella 
  in 
  its 
  wide 
  sense. 
  

  

  Elusa 
  enelata,i 
  n.sp. 
  PI. 
  lY, 
  Fig. 
  7. 
  

  

  T. 
  testa 
  aciculata, 
  nitidissima, 
  albo-vitrea, 
  tenui, 
  anfractibus 
  11-12, 
  

   quorum 
  duo 
  apicales 
  planorbuli, 
  inversim 
  heterostrophi, 
  vitrei, 
  perlseves, 
  

   caeteris 
  apud 
  suturas 
  impressis, 
  inferis 
  fere 
  rectis, 
  undique 
  longitudi- 
  

   naliter 
  costatis, 
  costis 
  laevibus, 
  crassis, 
  interstitiis 
  laevibus, 
  pellucidis, 
  

   striis 
  internis 
  spiralibus 
  videndis, 
  costis 
  ultimi 
  anfractus 
  circa 
  novem- 
  

   decim 
  infra 
  peripheriam 
  evanidis, 
  apertura 
  subrotunda, 
  peristomate 
  

   incrassato, 
  columella 
  excavata, 
  fortiter 
  uniplicata. 
  Long. 
  5, 
  lat. 
  

   1'25 
  mm. 
  

  

  Hal. 
  — 
  Bombay 
  (Abercrombie). 
  

  

  For 
  years 
  I 
  have 
  had 
  this 
  species 
  mixed 
  up 
  unaccountably 
  with 
  

   Turhonilla 
  terehrina 
  in 
  my 
  coiI?ction. 
  It 
  came 
  from 
  the 
  same 
  locality, 
  

   and 
  was 
  perhaps 
  overlooked 
  as 
  possibly 
  being 
  the 
  young 
  state 
  of 
  tlie 
  

   larger 
  species. 
  But 
  it 
  is 
  exceedingly 
  distinct, 
  the 
  very 
  shining 
  appear- 
  

   ance 
  of 
  crystalline 
  delicacy, 
  thick 
  longitudinal 
  smc 
  b, 
  ribs, 
  the 
  

   interstices 
  being 
  likewise 
  smooth, 
  though 
  the 
  spiral 
  internal 
  lines 
  

   show 
  through 
  in 
  certain 
  lights, 
  so 
  transparent 
  is 
  its 
  substance. 
  

   Peristome 
  thickened, 
  columella 
  with 
  one 
  strong 
  plait. 
  

  

  Elusa 
  strigillata, 
  A. 
  Adams. 
  

  

  Elusa 
  strigillata, 
  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc, 
  1862, 
  p. 
  237. 
  

   Hah. 
  — 
  P.G. 
  Gulf 
  of 
  Oman, 
  Maskat 
  (Muscat), 
  15 
  fathoms. 
  

   I. 
  Karachi. 
  Amongst 
  stones 
  and 
  mud 
  at 
  very 
  low 
  tides. 
  

  

  ivr]KaTov, 
  a 
  pin. 
  

  

  