﻿192 
  PUOChlKDINGS 
  OK 
  THE 
  M 
  A 
  LACOLOGICAL 
  SOCIETY. 
  

  

  imiformly 
  closely 
  striolate, 
  mouth 
  squarely 
  oval, 
  columella 
  straight, 
  

   base 
  plain, 
  smooth. 
  Named 
  in 
  honour 
  of 
  Mr. 
  Frederick 
  W. 
  Townsend. 
  

  

  TURBONILLA 
  UNICIKCTA, 
  n.Sp. 
  PI. 
  V, 
  Fig. 
  12. 
  

  

  T. 
  testa 
  aciculata, 
  gracillima, 
  angusta, 
  delicata, 
  alba, 
  anfractibus 
  

   ad 
  13, 
  quorum 
  2^ 
  apicales 
  bulbosi, 
  plan 
  orb 
  uli, 
  heterostrophi, 
  caeteris 
  

   ad 
  suturas 
  multumimpressis, 
  ventricosis, 
  longitudinaliter 
  ante 
  obliqui- 
  

   costatis, 
  interstitiis 
  microscopice 
  spiraliter 
  delicatissime 
  striatulis, 
  

   ultimi 
  costis 
  numero 
  ad 
  32, 
  trans 
  basim 
  extensis, 
  ad 
  medium 
  trium 
  

   anfractuum 
  ultimoruni 
  Isete 
  et 
  anguste 
  zona 
  rufo-brunnea 
  decoratis, 
  

   apertura 
  rotunda, 
  peristomate 
  tenui, 
  columella 
  paullum 
  excavata. 
  

   Long. 
  5"50, 
  lat. 
  1"25 
  mm. 
  

  

  Hab.—M^.C. 
  Off 
  Charbar, 
  40 
  fathoms. 
  

  

  A 
  very 
  select, 
  delicate, 
  and 
  graceful 
  species, 
  of 
  which 
  we 
  have 
  seen 
  

   only 
  one, 
  but 
  very 
  perfect 
  example. 
  It 
  is 
  white, 
  thin, 
  attenuate, 
  the 
  

   heterostrophe 
  nuclear 
  whorls 
  smooth, 
  bulbous, 
  turned 
  over 
  at 
  right 
  

   angles, 
  the 
  rest 
  being 
  ventricose, 
  very 
  closely 
  obliquely 
  ribbed, 
  the 
  

   interstices 
  microscopically 
  finely 
  striate. 
  The 
  three 
  lowest 
  whorls 
  

   are 
  narrowly 
  banded 
  with 
  a 
  thin 
  rufous 
  brown 
  zone 
  in 
  the 
  centre. 
  

  

  TURBONILLA 
  ZETEMIA,^ 
  U.Sp. 
  PI. 
  V, 
  Fig. 
  13. 
  

  

  T. 
  testa 
  multum 
  attenuata, 
  parva, 
  rudi, 
  pallide 
  straminea, 
  anfractibus 
  

   11, 
  quorum 
  2 
  J 
  nucleares 
  planorbuli, 
  heterostrophi, 
  vitrei, 
  tumiduli, 
  

   cfeteris 
  ad 
  suturas 
  iinpressis, 
  ventricosulis, 
  undique 
  longitudinaliter 
  

   costatis, 
  costis 
  rudibiis, 
  laevibus, 
  nitidis, 
  incrassatis, 
  numero 
  anfractum 
  

   apud 
  ultimum 
  circa 
  14, 
  hie 
  illic 
  crassi-varicosis, 
  interstitiis 
  spiraliter 
  

   striatis, 
  apertura 
  parva, 
  subrotunda, 
  labro 
  paullum 
  crassiusculo, 
  basi 
  

   laevigata, 
  columella 
  recta. 
  Long. 
  5, 
  lat. 
  1 
  mm. 
  

  

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

   156 
  fathoms, 
  shell-sand. 
  

  

  A 
  small 
  species, 
  of 
  which 
  we 
  have 
  seen 
  but 
  very 
  few 
  specimens, 
  

   and 
  none 
  of 
  them 
  in 
  good 
  condition. 
  Its 
  principal 
  characteristics 
  are 
  

   the 
  few 
  but 
  coarse 
  incrassate 
  ribs, 
  with 
  interstitial 
  — 
  also 
  rather 
  coarse 
  

   striation 
  ; 
  a 
  few 
  varices 
  are 
  likewise 
  found 
  here 
  and 
  there. 
  The 
  

   base 
  is 
  smooth, 
  mouth 
  small, 
  peristome 
  slightly 
  thickened. 
  

   T. 
  Townsendi 
  is 
  of 
  the 
  same 
  character 
  but 
  a 
  much 
  stouter 
  and 
  

   broader 
  shell, 
  and 
  T. 
  pachypleura 
  may 
  be 
  compared. 
  

  

  N.B. 
  Several 
  other 
  Turbonillce 
  live 
  in 
  these 
  seas, 
  judging 
  from 
  

   various 
  insufficient 
  fragments 
  that 
  have 
  occurred 
  in 
  shell- 
  sand 
  and 
  

   other 
  dredgings, 
  and 
  it 
  is 
  probable 
  that 
  but 
  a 
  tithe 
  of 
  the 
  number 
  

   that 
  exist 
  have 
  been 
  catalogued 
  at 
  the 
  present 
  opportunity. 
  

  

  MUMIOLA 
  CAKBASEA, 
  Mclvill. 
  

  

  Mujniola 
  carbasea, 
  Melvill, 
  Journ. 
  Malac, 
  vol. 
  xi, 
  p. 
  83, 
  pi. 
  viii, 
  fig. 
  12. 
  

  

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

   156 
  fathoms. 
  

  

  Like 
  M. 
  spirata. 
  Ad., 
  in 
  miniature, 
  but 
  of 
  thinner, 
  papyraceous 
  

   texture. 
  

  

  ' 
  Qi\T7}ixo., 
  a 
  thing 
  sought 
  out. 
  

  

  