﻿MELTILL 
  : 
  PYEAMIDELLID^ 
  OP 
  THE 
  PJ:RSIAN 
  GULF, 
  ETC. 
  1 
  89 
  

  

  costis 
  rectis, 
  nitidis 
  simul 
  ac 
  interstitiis 
  loevissimis 
  apud 
  suturas, 
  

   impressis, 
  haud 
  yentricosis, 
  interne 
  arete 
  spiraliter 
  lacteo-zoniilatis, 
  

   ultimo 
  anfractu 
  costis 
  infra 
  medium 
  evanidis 
  basi 
  laevi, 
  apertura 
  

   ovata, 
  peristomate 
  paullum 
  incrassato, 
  columella 
  recta. 
  Long. 
  10, 
  

   lat. 
  2 
  mm. 
  

  

  mib.—T.G. 
  Gulf 
  of 
  Oman, 
  lat. 
  25° 
  13' 
  N., 
  long. 
  58° 
  40' 
  E., 
  

   120 
  fathoms. 
  

  

  One 
  of 
  the 
  most 
  graceful 
  and 
  beautiful 
  of 
  the 
  Eastern 
  Ttirlonillce. 
  

   The 
  shell, 
  unique 
  at 
  the 
  present 
  time, 
  is 
  without 
  a 
  flaw, 
  and 
  with 
  

   its 
  many 
  whorls 
  straitly 
  ascending 
  in 
  regular 
  series, 
  the 
  pellucid 
  

   interstices 
  reflecting 
  the 
  internal 
  spiral 
  striation 
  presents 
  an 
  exquisite 
  

   example 
  of 
  perfect 
  symmetry. 
  

  

  TuKBONILLA 
  PUNCTILLTJM,^ 
  n.Sp. 
  PI. 
  V, 
  Eig. 
  7. 
  

  

  T. 
  testa 
  parva, 
  aciculata, 
  delicata, 
  albo-ochracea, 
  anfractibus 
  9^, 
  

   quorum 
  2^ 
  nucleares, 
  bulbosi, 
  heterostrophi, 
  planorbuli, 
  cseteris 
  ad 
  

   suturas 
  impressis, 
  subventricosis, 
  Isevibus, 
  undique 
  longitudinaliter. 
  4. 
  

   costulatis, 
  costis 
  flexuosis, 
  tenuibus, 
  supra, 
  juxta 
  suturas 
  spiral!«^t 
  

   regulariter 
  interstitialiter 
  profunde 
  punctatis, 
  ad 
  ultimum 
  nu^^l"^ 
  

   costarum 
  circa 
  21, 
  ad 
  basim 
  Isevem, 
  apertura 
  parva, 
  subrotunda, 
  

   peristomate 
  fere 
  continue, 
  tenui, 
  columella 
  recta. 
  Long. 
  4, 
  lat. 
  1 
  mm. 
  

  

  Eah.—¥.G. 
  Gulf 
  of 
  Oman, 
  lat. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54' 
  E., 
  

   156 
  fathoms, 
  shell-sand. 
  

  

  Only 
  one 
  or 
  two 
  examples 
  have 
  occurred 
  of 
  this 
  distinct 
  species, 
  

   very 
  small, 
  with 
  thin 
  flexuous 
  longitudinal 
  ribs, 
  interstices 
  smooth, 
  

   but 
  spirally 
  punctate 
  above, 
  near 
  the 
  sutures, 
  in 
  one 
  regular 
  line 
  

   throughout 
  the 
  whorls. 
  The 
  nucleus 
  is 
  bulbous, 
  vitreous, 
  and 
  

   planorbiform. 
  

  

  TuEBONILLA. 
  QU^STUOSA, 
  n.sp. 
  PI. 
  V, 
  Eig. 
  8. 
  

  

  T. 
  testa 
  parva, 
  aciculata, 
  delicata, 
  albo-lactea, 
  subpellucida, 
  tenui, 
  

   laevi, 
  anfractibus 
  9, 
  duobus 
  apicalibus 
  parvis 
  heterostrophis, 
  cseteris 
  

   ad 
  suturas 
  impressis, 
  gradatulis, 
  paullum 
  tumidulis, 
  undique 
  obliqui- 
  

   costatis, 
  costis 
  anfractus 
  ultimi 
  flexuosis, 
  versus 
  basim 
  fere 
  vel 
  omnino 
  

   evanidis, 
  apertura 
  ovata, 
  peristomate 
  tenui, 
  columella 
  excavata. 
  

   Long. 
  4, 
  lat. 
  1 
  mm. 
  

  

  Hah. 
  — 
  Bombay 
  (Abercrombie). 
  

  

  A 
  delicate, 
  thin 
  Turlonilla, 
  with 
  oblique 
  longitudinal 
  costse, 
  which 
  

   are 
  flexuous 
  on 
  the 
  body-whorl, 
  and 
  become 
  almost 
  in 
  parts 
  evanescent 
  

   near 
  the 
  base. 
  The 
  whorls 
  are 
  impressed 
  suturally, 
  and 
  shouMered. 
  

   One 
  interesting 
  character 
  consists 
  in 
  the 
  costae 
  of 
  the 
  upper 
  whorls 
  

   ceasing 
  a 
  little 
  way 
  from 
  the 
  suture, 
  leaving 
  a 
  narrow, 
  smooth 
  space. 
  

   The 
  shell 
  is 
  semi-transparent, 
  milky 
  white, 
  and 
  quite 
  smooth, 
  the 
  

   surface 
  being 
  dull, 
  and 
  not 
  shining 
  as 
  is 
  so 
  usual 
  a 
  character 
  in 
  the 
  

   genus. 
  From 
  T. 
  tenuicosta, 
  Melvill, 
  an 
  Erythraean 
  species, 
  it 
  would 
  

   seem 
  to 
  differ 
  in 
  possessing 
  nine 
  whorls 
  against 
  six 
  and 
  a 
  half, 
  dulness 
  

   against 
  shining 
  appearance, 
  and 
  other 
  minor 
  differences 
  exist. 
  

  

  ^ 
  Ptmctillnm, 
  a 
  little 
  dot. 
  

  

  