﻿20 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETT. 
  

  

  granules 
  by 
  close 
  spirals 
  ; 
  below 
  the 
  peripliery 
  the 
  spirals 
  are 
  

   microscopic; 
  corneous, 
  dull 
  above, 
  shining 
  below. 
  Whorls 
  5h, 
  

   increasing 
  regularly, 
  slightly 
  convex 
  above, 
  tumid 
  below, 
  angulated 
  

   at 
  the 
  peripherj', 
  not 
  descending. 
  Aperture 
  sublimate 
  ; 
  peristome 
  

   acute, 
  columellar 
  slightly 
  reflected 
  over 
  the 
  narrow 
  perforation 
  of 
  the 
  

   umbilicus. 
  

  

  Diani. 
  niiij. 
  27'5, 
  min. 
  25 
  mm. 
  ; 
  alt. 
  14 
  mm. 
  

  

  Hab. 
  — 
  liorneo. 
  

  

  Type 
  in 
  my 
  collection. 
  

  

  The 
  second 
  specimen, 
  not 
  quite 
  in 
  such 
  good 
  condition 
  as 
  the 
  

   type, 
  has 
  six 
  whorls 
  completed 
  and 
  measures 
  29 
  X 
  2.5*5 
  x 
  15 
  mm. 
  

   The 
  nearest 
  ally 
  appears 
  to 
  be 
  £. 
  pseiistex^ 
  Sm., 
  but 
  that 
  species 
  is 
  

   somewhat 
  smaller, 
  more 
  depressed, 
  shining 
  above, 
  rounded 
  at 
  the 
  

   periphery, 
  and 
  imperforate. 
  The 
  only 
  other 
  s])irally 
  sculptured 
  

   species 
  is 
  E. 
  suhivi 
  perforata, 
  Sm., 
  but 
  from 
  this 
  the 
  new 
  species 
  

   differs 
  in 
  being 
  much 
  more 
  depressed, 
  larger 
  in 
  diameter, 
  and 
  by 
  

   having 
  an 
  angulated 
  periphery. 
  The 
  specific 
  designation 
  is 
  derived 
  

   from 
  the 
  Malay 
  name 
  of 
  Eorneo 
  : 
  Pulo 
  Klemmantan. 
  

  

  NOTE 
  ON 
  THE 
  MALACOPHAGOUS 
  PROPENSITIES 
  OF 
  

   HELIX 
  NEMOBALIS, 
  LINN. 
  

  

  By 
  Dr. 
  W. 
  T. 
  Elliott, 
  F.L.S. 
  

  

  Bead 
  11th 
  January, 
  1918. 
  

  

  I 
  NOTICED 
  in 
  rearing 
  some 
  juvenile 
  specimens 
  of 
  Helix 
  nemoralis, 
  L., 
  

   that 
  every 
  now 
  and 
  then 
  one 
  of 
  the 
  aninuils 
  had 
  been 
  partly 
  devoured 
  

   and 
  the 
  shell 
  eaten 
  awaj^. 
  On 
  further 
  close 
  observation 
  I 
  found 
  one 
  

   animal 
  in 
  the 
  act 
  of 
  devouring 
  its 
  fellow, 
  which 
  was 
  much 
  larger. 
  

   I 
  cannot 
  find 
  any 
  previous 
  direct 
  reference 
  to 
  this 
  abnormal 
  

   propensity, 
  but 
  the 
  following 
  references 
  may 
  be 
  quoted 
  (Johnston's 
  

   *' 
  Conchology 
  ", 
  p. 
  336): 
  " 
  Pulmonated 
  Gasteropods 
  have 
  a 
  strange 
  

   hankering 
  after 
  flesh 
  and 
  become 
  cannibals 
  in 
  satisfying 
  this 
  

   propensity." 
  

  

  Taylor 
  (Monograph, 
  vol. 
  i, 
  p. 
  420) 
  says 
  : 
  " 
  In 
  the 
  British 
  Isles, 
  

   although 
  many 
  species 
  intermittently 
  display 
  malacovorons, 
  or 
  

   cannabalistic 
  propensities, 
  such 
  habits 
  are 
  not 
  normal, 
  but 
  often 
  

   induced 
  by 
  hunger 
  or 
  other 
  excitant." 
  

  

  Miss 
  Hele 
  (Journ. 
  Conch., 
  vol. 
  v, 
  y). 
  43) 
  records 
  PoZ/^rt 
  draparnaldi 
  

   as 
  being 
  carnivorous 
  in 
  captivity, 
  but 
  in 
  this 
  case 
  it 
  was 
  due 
  to 
  

   want 
  of 
  food 
  during 
  the 
  winter. 
  

  

  In 
  the 
  present 
  instance 
  the 
  animals 
  were 
  in 
  the 
  height 
  of 
  the 
  

   feeding 
  season 
  (July) 
  and 
  plentifully 
  sujiplied 
  Avith 
  food, 
  but 
  they 
  

   were 
  rather 
  crowded 
  in 
  the 
  casie 
  in 
  which 
  they 
  were 
  confined, 
  and 
  

   none 
  of 
  them 
  were 
  adults. 
  The 
  shells 
  were 
  not 
  attacked 
  at 
  the 
  

   mouth, 
  which 
  would 
  have 
  been 
  a 
  more 
  ready 
  way 
  apparently 
  of 
  

   gaining 
  access 
  to 
  the 
  animal, 
  for 
  they 
  were 
  all 
  in 
  an 
  active 
  condition. 
  

  

  