﻿PKOCKKDrNGS 
  OF 
  THE 
  M.ALACOLOGICAL 
  SOCIEXr, 
  

  

  N 
  T 
  E 
  S 
  

  

  KoTE 
  ON 
  AN 
  Abnormal 
  Specimen 
  of 
  Nautilus 
  pompilius. 
  {Read 
  

   10th 
  December, 
  1909.) 
  — 
  This 
  specimen 
  is 
  figured 
  by 
  Dr. 
  Arthur 
  Willey 
  

   (Zoological 
  liesults, 
  pt. 
  vi, 
  p. 
  812, 
  fig. 
  15). 
  It 
  was 
  given 
  to 
  him 
  at 
  Ralum 
  

   in 
  New 
  Britain. 
  It 
  is 
  divided 
  into 
  two 
  nearly 
  equal 
  halves 
  by 
  a 
  sub- 
  

   median 
  groove, 
  not 
  unlike 
  that 
  in 
  Pleurotomaria. 
  The 
  groove 
  extends 
  

   from 
  the 
  edge 
  of 
  the 
  lip 
  round 
  the 
  periphery 
  of 
  the 
  shell 
  and 
  within 
  the 
  

   aperture 
  as 
  far 
  as 
  the 
  eye 
  can 
  follow 
  it. 
  Dr. 
  Willey 
  observes 
  : 
  " 
  I 
  am 
  

   unable 
  to 
  decide 
  whether 
  it 
  was 
  due 
  to 
  an 
  injury 
  to 
  the 
  mantle 
  or 
  to 
  some 
  

   congenital 
  malformation." 
  

  

  I 
  am 
  of 
  ojiinion, 
  however, 
  that 
  it 
  is 
  due 
  to 
  an 
  injury 
  to 
  the 
  mantle, 
  for 
  

   I 
  have 
  seen 
  in 
  other 
  specimens 
  of 
  N. 
  pompilius 
  similar 
  grooves, 
  but 
  less 
  

   pronounced, 
  commencing 
  at 
  diff'erent 
  places, 
  and 
  in 
  one 
  example 
  three 
  

   such 
  grooves 
  occur, 
  two, 
  about 
  an 
  inch 
  apart, 
  starting 
  from 
  the 
  same 
  

   growth-line, 
  and 
  the 
  third 
  about 
  2^ 
  inches 
  nearer 
  the 
  lip 
  of 
  the 
  shell. 
  

   Such 
  injuries 
  to 
  the 
  mantle, 
  resulting 
  in 
  these 
  abnormalities, 
  might 
  easily 
  

   be 
  caused 
  by 
  the 
  bite 
  of 
  a 
  fish 
  or 
  the 
  nip 
  of 
  a 
  Crustacean. 
  

  

  Mr. 
  G. 
  C 
  Crick 
  has 
  shown 
  me 
  an 
  almost 
  similar 
  abnormality 
  in 
  a 
  

   specimen 
  of 
  the 
  Eocene 
  N. 
  Ifokattamensis, 
  Foord, 
  from 
  Mokattam 
  Range, 
  

   near 
  Cairo. 
  

  

  E. 
  A. 
  Smith. 
  

  

  Note 
  on 
  the 
  Egg-capsules 
  oe 
  IIelo. 
  {Read 
  Wth 
  January 
  , 
  1910.) 
  — 
  

   Mr. 
  A. 
  J. 
  Jukes-Browne 
  has 
  very 
  kindly 
  placed 
  in 
  my 
  hands 
  some 
  egg- 
  

   capsules 
  of 
  a 
  species 
  oi 
  Melo 
  from 
  Dunk 
  Island 
  ofi" 
  the 
  North 
  Queensland 
  

   coast, 
  and 
  as 
  nothing 
  appears 
  to 
  have 
  been 
  written 
  upon 
  the 
  eggstage 
  of 
  

   that 
  genus 
  the 
  following 
  few 
  observations 
  may 
  be 
  of 
  some 
  interest. 
  

  

  Although 
  it 
  has 
  been 
  stated 
  by 
  Gray 
  ' 
  that 
  the 
  animal 
  of 
  Melo 
  is 
  

   oviparous, 
  I 
  have 
  failed 
  to 
  discover 
  the 
  source 
  of 
  his 
  information. 
  On 
  

   the 
  contrary, 
  the 
  Messrs. 
  H. 
  & 
  A. 
  Adams 
  - 
  observe 
  that 
  " 
  the 
  animal 
  of 
  

   this 
  genus 
  appears 
  to 
  be 
  ovo-viviparous, 
  the 
  same 
  as 
  Ci/mhium 
  of 
  Klein, 
  

   the 
  young 
  ones 
  being 
  arranged 
  in 
  the 
  oviduct 
  of 
  the 
  female 
  in 
  a 
  long 
  

   string, 
  without 
  egg-shells 
  ". 
  This 
  statement 
  is 
  copied 
  by 
  Tryon,'' 
  and 
  it 
  

   might 
  also 
  be 
  inferred 
  from 
  what 
  appears 
  in 
  Fischer's 
  Manuel 
  de 
  Conch., 
  

   p. 
  606, 
  that 
  the 
  animal 
  is 
  viviparous. 
  

  

  The 
  observations, 
  however, 
  of 
  Mr. 
  J. 
  Banfield, 
  who 
  collected 
  the 
  cluster 
  

   of 
  egg-capsules, 
  part 
  of 
  which 
  is 
  now 
  exhibited 
  and 
  described 
  in 
  a 
  letter 
  

   to 
  Mr. 
  Jukes-Bi'owne, 
  remove 
  all 
  doubt 
  upon 
  the 
  matter. 
  He 
  himself 
  has 
  

   given 
  some 
  account 
  of 
  these 
  capsules 
  in 
  his 
  interesting 
  book 
  entitled 
  The 
  

   Confessions 
  of 
  a 
  Beachcomber. 
  

  

  The 
  mass 
  of 
  egg-cases 
  was 
  cast 
  up 
  on 
  the 
  shore 
  attached 
  to 
  a 
  piece 
  of 
  

   coral. 
  It 
  was 
  16j 
  inches 
  in 
  length, 
  12| 
  in 
  circumference 
  at 
  one 
  end, 
  

   narrowing 
  to 
  7 
  at 
  the 
  other. 
  It 
  weighed 
  1| 
  lb., 
  and 
  consisted 
  of 
  126 
  

   separate 
  cells 
  or 
  capsules. 
  These 
  are 
  conical 
  in 
  form, 
  the 
  rounded 
  apices 
  

   being 
  free 
  and 
  turned 
  inwards, 
  the 
  bases 
  external 
  and 
  connected 
  with 
  one 
  

   another, 
  but 
  not 
  always 
  completely, 
  so 
  that 
  irregular 
  openings 
  occur 
  

  

  ' 
  Proc. 
  Zool. 
  Soc, 
  1855, 
  p. 
  53 
  ; 
  List 
  of 
  Mollusca, 
  Brit. 
  Mus. 
  Volutidfc, 
  p. 
  4 
  ; 
  

  

  Guide 
  to 
  Moll. 
  Brit. 
  Mus. 
  (1857), 
  p. 
  33. 
  

   - 
  Genera 
  Moll., 
  vol. 
  i, 
  p. 
  158. 
  

   ^ 
  Man. 
  Conch., 
  vol. 
  iv, 
  p. 
  SO. 
  

  

  