﻿184 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  18-19 
  ad 
  basim 
  evanidis, 
  apertura 
  subrotuuda, 
  columella 
  fere 
  recta, 
  

   simplice. 
  Long. 
  4-50, 
  lat. 
  1*25 
  mm. 
  

  

  Hah. 
  — 
  Bombay. 
  

  

  A 
  very 
  neat 
  species, 
  allied 
  to 
  T, 
  terebrina^ 
  Melvill. 
  Pale 
  ochreous 
  

   to 
  straw 
  colour, 
  with 
  very 
  smooth 
  and 
  frequent 
  riblets, 
  quite 
  straight 
  

   and 
  regular. 
  With 
  a 
  powerful 
  lens 
  interstitial 
  striae 
  are 
  observable, 
  

   but 
  these 
  are 
  most 
  obscure, 
  and 
  might 
  be 
  easily 
  overlooked. 
  The 
  

   apical 
  whorls 
  are 
  inversely 
  planorbiform. 
  The 
  general 
  contour 
  of 
  

   the 
  shell 
  suggests 
  a 
  Terehra 
  in 
  miniature. 
  But 
  few 
  examples 
  have 
  

   occurred 
  in 
  shell-sand. 
  

  

  TuKBONiLLA 
  ETJMEisrEs,' 
  u.sp. 
  PL 
  lY, 
  Fig. 
  12. 
  

  

  T. 
  testa 
  minuta, 
  delicata, 
  rimata, 
  attenuate- 
  cylindriea, 
  subpellucida, 
  

   alba, 
  anfractibus 
  7, 
  quorum 
  duo 
  apicales 
  heterostrophi, 
  perlseves, 
  

   depressoplanati, 
  cseteris 
  gradatulis, 
  suturaliter 
  impressis, 
  undique 
  

   longitudinaliter 
  costulatis, 
  costis 
  fere 
  rectis, 
  Isevibus, 
  nitidis, 
  striis 
  

   interstitialibus 
  arete 
  prseditis, 
  numero 
  costarum 
  anfractus 
  ultimi 
  

   circa 
  viginti, 
  apertura 
  oblongo-ovata, 
  peristomate 
  tenui, 
  columella 
  

   simplice, 
  paullum 
  obliqua, 
  dein 
  versus 
  basim 
  recta. 
  Long. 
  3'25, 
  

   lat. 
  1 
  mm. 
  

  

  Hob. 
  — 
  Bombay, 
  in 
  shell-sand 
  (Abercrombie). 
  

  

  A 
  minute 
  and 
  most 
  delicate 
  species, 
  perhaps 
  not 
  quite 
  adult. 
  The 
  

   shining, 
  smooth 
  ribs, 
  about 
  twenty 
  in 
  number 
  on 
  the 
  body-whorl, 
  

   stand 
  out 
  prominently 
  under 
  a 
  lens, 
  in 
  contrast 
  with 
  the 
  somewhat 
  

   coarse 
  striae, 
  proportionately 
  speaking. 
  The 
  whorls 
  are 
  gradate, 
  

   nuclear 
  whorls 
  two, 
  smooth, 
  somewhat 
  flattened. 
  Columella 
  simple. 
  

   I 
  do 
  not 
  know 
  a 
  species 
  similar, 
  unless 
  it 
  be 
  T. 
  neogila, 
  also 
  

   described 
  in 
  this 
  paper, 
  and, 
  though 
  not 
  quite 
  sure 
  of 
  the 
  location, 
  

   place 
  it 
  with 
  some 
  confidence 
  amongst 
  the 
  TarhonillcB, 
  section 
  

   Pyrgiscus, 
  Phil. 
  

  

  TUEBONILLA 
  FEATEENA, 
  n.Sp. 
  PL 
  IV, 
  Fig. 
  13. 
  

  

  T. 
  testa 
  aciculata, 
  minuta, 
  angustissima, 
  alba, 
  delicata, 
  anfractibus 
  

   10, 
  quorum 
  duo 
  apicales 
  bulbosi, 
  heterostrophi, 
  caeteris 
  ad 
  suturas 
  

   multum 
  impressis, 
  ventricosulis, 
  undique 
  longitudinaliter 
  laevicostatis, 
  

   interstitiis 
  laevibus, 
  apertura 
  fere 
  rotunda, 
  peristomate 
  paullum 
  in- 
  

   crassato, 
  columella 
  simplice. 
  Long. 
  3, 
  lat. 
  "075 
  mm. 
  

  

  Mah.—T.G. 
  Gulf 
  of 
  Oman, 
  lat. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54' 
  E., 
  

   156 
  fathoms. 
  

  

  An 
  abundant 
  Tiirlonilla 
  in 
  the 
  above 
  most 
  prolific 
  dredging, 
  but 
  

   not 
  yet 
  noticed 
  from 
  elsewhere, 
  this 
  little 
  shell 
  was 
  at 
  first 
  considered 
  

   a 
  variety 
  of 
  T. 
  hasilica, 
  Melv., 
  which 
  is 
  by 
  no 
  means 
  so 
  graceful 
  a 
  shell, 
  

   being 
  more 
  cylindrical 
  in 
  form 
  and 
  with 
  different 
  character 
  of 
  ribs. 
  

   With 
  the 
  exception 
  of 
  T. 
  angustissima, 
  it 
  is 
  the 
  narrowest 
  species 
  in 
  

   proportion 
  to 
  its 
  length 
  known 
  from 
  this 
  region. 
  It 
  is 
  allied 
  to 
  

   T. 
  delicata, 
  Monter., 
  from 
  the 
  South 
  Mediterranean, 
  Algiers, 
  etc. 
  

  

  ^ 
  evixevTjs, 
  acceptable. 
  

  

  