﻿194 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIEXr. 
  

  

  OSCILLA 
  FACETA, 
  Melvill. 
  

  

  Ossilla 
  faceta, 
  Melvill, 
  Journ. 
  Malac, 
  vol. 
  xi, 
  p. 
  82, 
  pi. 
  viii, 
  fig. 
  10, 
  

   1904. 
  

   Hal).—?.(}. 
  Gulf 
  of 
  Oman, 
  lat. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54' 
  E., 
  

   156 
  fathoms, 
  shell-sand. 
  

  

  OsciLLA 
  EVANiDA, 
  n.sp. 
  PL 
  V, 
  Fig. 
  15. 
  

  

  0. 
  testa 
  parva, 
  fusiformi, 
  anguste 
  umbilicata, 
  albocinerea, 
  anfractibus 
  

   8, 
  quorum 
  duo 
  apicales 
  depressi, 
  fere 
  immersi, 
  caeteris 
  apud 
  suturas 
  

   impressis, 
  quinque 
  supernis 
  duabus 
  obtusis 
  carinis 
  prjieditis, 
  ultimo 
  

   simili 
  modo 
  sed 
  obscure 
  bicarinato, 
  deinde 
  versus 
  basini 
  evanido, 
  

   apertura 
  ovata, 
  labro 
  tenui, 
  columella 
  fortiter 
  uniplicata. 
  Long. 
  3 
  '50, 
  

   lat. 
  1"75 
  mm. 
  

  

  Hal. 
  — 
  Karachi. 
  

  

  A 
  somewhat 
  aberrant 
  Oscilla, 
  but 
  I 
  am 
  at 
  a 
  loss 
  where 
  otherwise 
  

   to 
  place 
  it. 
  The 
  two 
  apical 
  whorls 
  are 
  somewhat 
  depressed 
  and 
  

   inconspicuous, 
  the 
  five 
  next 
  in 
  order 
  uniformly 
  bicarinate, 
  the 
  keels 
  

   very 
  conspicuous 
  ; 
  the 
  body-whozi 
  is 
  more 
  obscurely 
  keeled, 
  but 
  

   becomes 
  almost 
  smooth 
  ultimately 
  towards 
  the 
  base, 
  and 
  from 
  this 
  

   circumstance 
  the 
  trivial 
  name 
  has 
  been 
  suggested. 
  0. 
  mtrabilis, 
  

   Preston, 
  from 
  Ceylon, 
  a 
  more 
  acutely 
  keeled 
  species, 
  is 
  akin 
  to 
  

   0. 
  evanida. 
  

  

  Oscilla 
  indica, 
  Melvill. 
  

   Oscilla 
  indica, 
  Melvill, 
  Proc. 
  Malac. 
  Soc, 
  vol. 
  ii, 
  p. 
  112, 
  pi. 
  viii, 
  fig. 
  5. 
  

   Hah. 
  — 
  M.C, 
  Charbar, 
  40 
  fathoms. 
  

  

  1. 
  Bombay 
  (Abercrombie) 
  ; 
  Karachi. 
  

  

  Not 
  an 
  uncommon 
  species 
  in 
  these 
  seas, 
  almost 
  always 
  occurring 
  in 
  

   company 
  with 
  the 
  similar 
  Irawadia 
  trochlearis, 
  Blanf., 
  as 
  well 
  as 
  with 
  

   0. 
  tornata. 
  It 
  has 
  been 
  found 
  at 
  Aden 
  by 
  Commander 
  E. 
  R. 
  Shopland. 
  

  

  Oscilla 
  jocosa, 
  Melvill. 
  

  

  Oscilla 
  jocosa, 
  Melvill, 
  Journ. 
  Malac, 
  vol. 
  xi, 
  p. 
  82, 
  pi. 
  viii, 
  fig. 
  11 
  ; 
  

   Dautzenberg 
  & 
  Fischer, 
  Journ. 
  de 
  Conch., 
  vol. 
  liv, 
  p. 
  181, 
  pi. 
  vii, 
  

   figs. 
  6, 
  7, 
  1907. 
  

   Occurred 
  with 
  0. 
  faceta, 
  both 
  being 
  of 
  uncommon 
  occurrence. 
  

  

  Oscilla 
  tornata, 
  Melvill. 
  

   Oscilla 
  tornata, 
  Melvill, 
  Mem. 
  Manch. 
  Soc, 
  1893, 
  p. 
  8, 
  pi. 
  i, 
  fig. 
  12. 
  

  

  Hal.—W.Q. 
  Charbar, 
  7-40 
  fathoms. 
  

  

  I. 
  Karachi, 
  common 
  ; 
  Bombay 
  (Abercrombie). 
  

  

  I 
  cannot 
  follow 
  Dall 
  & 
  Bartsch 
  in 
  making 
  Oscilla,^ 
  A. 
  Ad., 
  sub- 
  

   servient 
  to 
  Cingnlina, 
  A. 
  Ad.^ 
  The 
  columellar 
  plication 
  of 
  the 
  former 
  

   is 
  a 
  conspicuous 
  feature. 
  

  

  1 
  Proc. 
  Zool. 
  Soc, 
  1867, 
  p. 
  310. 
  

  

  2 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  1860, 
  p. 
  414. 
  

  

  