﻿MELVILL 
  : 
  PTEAMIDELLID^ 
  OF 
  THE 
  PERSIAN 
  GtJLF, 
  ETC. 
  199 
  

  

  E:ah.—?.(}. 
  Gulf 
  of 
  Oman, 
  lat. 
  25° 
  39' 
  N., 
  long. 
  57° 
  19' 
  E., 
  

   110 
  fathoms. 
  

  

  A 
  shining, 
  flexuose-ribbed 
  species, 
  of 
  some 
  refinement 
  and 
  beauty. 
  

   With 
  aid 
  of 
  a 
  1 
  inch 
  objective 
  spiral 
  interstitial 
  lines, 
  three 
  in 
  number, 
  

   may 
  be 
  discovered 
  at 
  the 
  base 
  of 
  the 
  antepenultimate 
  and 
  penultimate 
  

   whorls, 
  and 
  in 
  the 
  centre 
  of 
  the 
  body- 
  whorl, 
  otherwise 
  the 
  shell 
  is 
  

   quite 
  smooth, 
  as 
  are 
  the 
  ribs. 
  These 
  are 
  spirally 
  gemmulate 
  just 
  

   below 
  the 
  sutures. 
  

  

  Pykgulina 
  cetstallopecta,' 
  n.sp. 
  PI. 
  VI, 
  Fig. 
  4. 
  

  

  T. 
  testa 
  perminuta, 
  anguste 
  attenuata, 
  fere 
  recta, 
  crystallina, 
  

   delicatissima, 
  anfraetibus 
  8, 
  quorum 
  duo 
  apicales 
  rotundo-bulbosi, 
  

   laeves, 
  cseteris 
  nitidis, 
  vitreis, 
  impressis, 
  ventricosulis, 
  undique 
  arete 
  

   longitudinaliter 
  recte 
  costulatis, 
  costis 
  juxta 
  suturas 
  spiraliter 
  gemmu- 
  

   latis, 
  utrinque 
  incrassatis, 
  subcaualiculatis, 
  interstitiis 
  minute 
  striatis, 
  

   apertura 
  fere 
  rotunda, 
  labro 
  ad 
  basim 
  elongato, 
  columella 
  obliqua, 
  

   plica 
  obsciirissima 
  vel 
  absente. 
  Long. 
  2, 
  lat. 
  '75 
  mm. 
  

  

  Hah.—K.Q. 
  Charbar, 
  40 
  fathoms. 
  

  

  A 
  small, 
  vitreous, 
  straight, 
  very 
  narrow 
  PyrguUna, 
  with 
  the 
  whorls 
  

   thickened 
  on 
  each 
  side 
  of 
  the 
  subcanaliculate 
  sutures, 
  the 
  regular 
  and 
  

   close 
  ribs 
  are 
  gemmulate 
  above, 
  just 
  below 
  the 
  sutures, 
  and 
  the 
  

   interstices 
  between 
  the 
  ribs 
  finely 
  spirally 
  striolate. 
  The 
  columella 
  

   plait 
  is 
  obscure, 
  though 
  just 
  below 
  the 
  orifice. 
  In 
  form 
  a 
  Turhonilla, 
  

   but 
  agreeing 
  in 
  many 
  points 
  with 
  the 
  genus 
  to 
  which 
  we 
  tentatively 
  

   assign 
  it. 
  

  

  Pyrgtjlina 
  decorata 
  (Philippi). 
  

   Odontostomia 
  decor 
  ata, 
  Phil., 
  Zeitsch. 
  fiir 
  Malak., 
  1849, 
  p. 
  29. 
  

  

  Hai. 
  — 
  I. 
  Karachi; 
  Bombay 
  (Abererombie). 
  

  

  I 
  incline 
  to 
  the 
  few 
  specimens, 
  all 
  in 
  worn 
  and 
  poor 
  condition 
  from 
  

   the 
  above 
  localities, 
  being 
  rather 
  this 
  species 
  than 
  P. 
  inter 
  striata, 
  

   Sowerby, 
  which 
  has 
  its 
  headquarters 
  in 
  New 
  Caledonia. 
  

  

  Pyrgulina 
  Datjtzenbergi, 
  n.sp. 
  PL 
  VI, 
  Fig. 
  5. 
  

  

  P. 
  testa 
  perminuta, 
  ovato-conica, 
  nitida, 
  alba, 
  anfraetibus 
  ad 
  5, 
  

   quorum 
  apicales 
  magni, 
  bulbosi, 
  heterostrophi, 
  caeteris 
  gradatulis, 
  

   Isevissimis, 
  undique 
  longitudinaliter 
  rotundicostatis, 
  costis 
  nitidis, 
  

   interstitiis 
  laevibus, 
  ultimo 
  anfractu 
  magis 
  numerosis, 
  circa 
  26, 
  hand 
  

   apud 
  basim 
  evanidis, 
  apud 
  peripheriam 
  linea 
  funiculari 
  spiraliter 
  

   prsedito, 
  apertura 
  ovata, 
  peristomate 
  fere 
  continue, 
  crassiusculo, 
  columella 
  

   obliqua, 
  fortiter 
  uniplicata. 
  Long. 
  2'5, 
  lat. 
  1 
  mm. 
  

  

  ^a5.— 
  Bombay 
  (F. 
  W. 
  Townsend). 
  

  

  A 
  remarkably 
  select 
  Pyrgulina, 
  though 
  so 
  very 
  minute. 
  The 
  

   peristome 
  being 
  thickened 
  and 
  well 
  formed, 
  causes 
  us 
  to 
  think 
  it 
  has 
  

   attained 
  its 
  full 
  growth. 
  The 
  ribs 
  of 
  the 
  upper 
  whorls 
  are 
  thicker, 
  

   proportionately, 
  and 
  likewise 
  not 
  so 
  numerous 
  as 
  those 
  on 
  the 
  body- 
  

   whorl, 
  this 
  being 
  decorated 
  with 
  one 
  spiral 
  funicular 
  line 
  about 
  the 
  

  

  ' 
  KpvffraWSirTiKTos 
  , 
  crystalline. 
  

  

  