﻿76 
  TROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  characters, 
  but 
  shall 
  anticipate 
  the 
  existence 
  of 
  Sinusigera 
  apices 
  

   in 
  that 
  genus. 
  

  

  A 
  rare 
  Purpuroid 
  on 
  Sunday 
  Island 
  was 
  a 
  shell 
  similar 
  in 
  general 
  

   appearance 
  to 
  figures 
  of 
  amygdala, 
  Kiener, 
  and 
  pseudamygdala, 
  

   Hedley. 
  It 
  was 
  immediately 
  I'ecognized 
  by 
  Mr. 
  Hedley 
  as 
  Brupa 
  

   cliaidea, 
  Duclos 
  (Ann. 
  Sci. 
  jSVt., 
  1834, 
  p. 
  106, 
  pi. 
  i, 
  fig. 
  4). 
  Young 
  in 
  

   all 
  stages 
  were 
  collected, 
  and 
  half-grown 
  specimens 
  agreed 
  perfectly 
  

   with 
  Pease's 
  figure 
  of 
  Sistrum 
  rugulosum 
  (A.mer. 
  Journ. 
  Conch., 
  

   1869, 
  vol. 
  iv, 
  p. 
  93, 
  pi. 
  xi, 
  fig. 
  7), 
  which 
  Tryon 
  had 
  already 
  referred 
  

   to 
  this 
  species 
  (Man. 
  Conch., 
  1880, 
  vol. 
  ii, 
  p. 
  187). 
  Why 
  this 
  

   shell 
  should 
  be 
  classed 
  as 
  a 
  Brupa 
  puzzled 
  me, 
  the 
  only 
  similar 
  shell 
  

   in 
  that 
  group 
  being 
  Blainville's 
  elakim, 
  which 
  seemed 
  also 
  to 
  me 
  

   incorrectly 
  placed. 
  It 
  was 
  therefore 
  pleasing 
  to 
  find 
  Hedley, 
  when 
  

   he 
  restored 
  to 
  the 
  latter 
  its 
  Linnean 
  designation 
  mancinella, 
  also 
  

   transferred 
  it 
  to 
  Thais 
  (Proc. 
  Linn. 
  Soc. 
  N.S.W., 
  1908, 
  vol. 
  xxxiii, 
  

   p. 
  457). 
  To 
  that 
  genus, 
  using 
  the 
  name 
  in 
  its 
  present 
  broad 
  sense, 
  

   I 
  would 
  allot 
  chaidea, 
  Duclos. 
  I 
  find 
  that 
  this 
  shell 
  has 
  a 
  Sinusigera 
  

   apex, 
  five-whorled, 
  shining 
  white, 
  smooth, 
  and 
  more 
  genteel 
  in 
  form 
  

   than 
  Sinithi, 
  Eraz. 
  I 
  do 
  not 
  doubt 
  that 
  such 
  an 
  apex 
  will 
  be 
  found 
  

   attached 
  to 
  mancinella, 
  Linne. 
  

  

  I 
  have 
  noted 
  that 
  Hedley 
  has 
  described 
  the 
  apex 
  of 
  Coralliophila 
  

   Lischkeana, 
  Dunker, 
  as 
  Sinusigera 
  in 
  form. 
  In 
  that 
  case 
  the 
  apex 
  is 
  

   very 
  heavily 
  sculptured, 
  and 
  it 
  maj^ 
  be 
  that 
  such 
  apices 
  exist 
  

   throughout 
  the 
  genus 
  Coralliophila, 
  I 
  have 
  seen 
  apices 
  in 
  Sunday 
  

   Island 
  dredgings 
  which 
  agree 
  perfectly 
  with 
  Hedley's 
  description 
  and 
  

   figure 
  (Mem. 
  Aust. 
  Mus., 
  1903, 
  vol." 
  iv, 
  p. 
  382, 
  tig. 
  96). 
  I 
  do 
  not 
  

   see 
  any 
  I'eason 
  to 
  doubt 
  the 
  existence 
  of 
  this 
  beautiful 
  Coralliophila 
  in 
  

   Sunday 
  Island 
  waters. 
  An 
  apex 
  with 
  an 
  even 
  more 
  beautifully 
  

   sculptured 
  SiniLsigera 
  apex 
  is 
  followed 
  by 
  a 
  half- 
  whorl 
  of 
  sculpture 
  

   Avhich 
  shows 
  it 
  to 
  be 
  either 
  Coralliophila 
  nivea, 
  A. 
  Ad., 
  or 
  a 
  very 
  

   close 
  ally. 
  

  

  Q,uoy 
  & 
  Gaimard's 
  monodonta, 
  to 
  which 
  is 
  united 
  Sowerby's 
  madre- 
  

   porarum, 
  was 
  referred 
  by 
  H. 
  & 
  A. 
  Adams 
  to 
  Coralliophila. 
  Pease, 
  on 
  

   account 
  of 
  its 
  habits, 
  placed 
  it 
  in 
  Rhizochilus, 
  but 
  though 
  it 
  lives 
  on 
  

   coi'al, 
  in 
  exactly 
  the 
  same 
  manner, 
  I 
  do 
  not 
  think 
  it 
  can 
  be 
  correctly 
  

   there 
  placed. 
  I 
  do 
  not 
  expect 
  to 
  find 
  a 
  Sinusigera 
  apex 
  attached 
  to 
  

   Rhizocliilus. 
  Tryon 
  referred 
  monodonta 
  to 
  Galeropsis 
  (Man. 
  Conch., 
  

   1880, 
  vol. 
  ii, 
  p. 
  212, 
  pi. 
  Ixvii, 
  figs. 
  389-91, 
  398), 
  and 
  was 
  followed 
  

   by 
  Hedley 
  (Mem. 
  Aust. 
  Mus., 
  i899, 
  vol. 
  iii, 
  p. 
  461). 
  Melvill 
  and 
  

   Standen 
  placed 
  it 
  in 
  Coralliophila 
  again 
  (Journ. 
  Conch., 
  1895, 
  

   vol. 
  viii, 
  p. 
  110), 
  and 
  that 
  place 
  is 
  probably 
  correct. 
  Young 
  shells 
  

   from 
  dredgings 
  show 
  it 
  to 
  have 
  a 
  heavily 
  sculptured 
  Sinusigera 
  apex. 
  

  

  So 
  far, 
  except 
  the 
  Bittium, 
  all 
  the 
  Sitmsigera 
  apices 
  have 
  belonged 
  

   to 
  Purptira, 
  Brupa 
  (?), 
  and 
  Coralliophila. 
  Searching 
  through 
  Sunday 
  

   Island 
  dredgings 
  I 
  came 
  across 
  a 
  beautiful 
  young 
  shell 
  showing 
  

   a 
  Sinusigera 
  apex, 
  which 
  was 
  clearly 
  referable 
  to 
  Alectrion. 
  It 
  was 
  

   only 
  an 
  odd 
  shell, 
  but 
  as 
  young 
  shells 
  which 
  I 
  had 
  recognized 
  as 
  

   gaudiosus, 
  Hinds, 
  were 
  at 
  hand, 
  I 
  examined 
  them, 
  and 
  found 
  that 
  

   they 
  were 
  undoubtedly 
  also 
  Sinusigera 
  in 
  form. 
  Other 
  odd 
  young 
  

   shells, 
  specifically 
  separable, 
  but 
  unidentifiable, 
  had 
  also 
  similar 
  

  

  