﻿MOLLUSCA. 
  71 
  

  

  88. 
  Trochus 
  (Isanda) 
  coronata. 
  (Plate 
  V. 
  figs. 
  P-P 
  2.) 
  

  

  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc. 
  1853, 
  p. 
  189, 
  & 
  1854, 
  pi. 
  27. 
  %. 
  5 
  ; 
  Genera 
  

  

  Rec. 
  Moll. 
  pi. 
  46. 
  fig. 
  2 
  ; 
  Chonn. 
  Man. 
  Conch, 
  fig. 
  2G1G. 
  

   Var.=I. 
  lepida, 
  A. 
  Adams, 
  P. 
  Z. 
  S. 
  1853, 
  p. 
  190. 
  

  

  Hah. 
  Port 
  Curtis, 
  7 
  fms., 
  and 
  Priday 
  Island, 
  Torres 
  Straits, 
  ou 
  

   the 
  beach 
  {Goppinger) 
  ; 
  South 
  Australia 
  {Caming). 
  

  

  With 
  the 
  exception 
  of 
  differences 
  in 
  colour 
  and 
  the 
  height 
  of 
  the 
  

   spires, 
  there 
  ajjpears 
  to 
  be 
  little 
  or 
  no 
  sufficient 
  reason 
  why 
  the 
  two 
  

   above-named 
  forms 
  should 
  be 
  specifically 
  separated. 
  The 
  subangu- 
  

   lation 
  of 
  the 
  body-whorl, 
  said 
  to 
  exist 
  in 
  /. 
  h-jrUia, 
  is 
  very 
  slight 
  and 
  

   equally 
  present 
  in 
  /. 
  coronata. 
  The 
  types 
  of 
  the 
  latter 
  are 
  described 
  

   as 
  being 
  ornamented 
  with 
  white 
  transverse 
  lines 
  and 
  brown 
  spots, 
  

   arranged 
  in 
  transverse 
  series 
  and 
  having 
  a 
  broad 
  white 
  band 
  at 
  the 
  

   sutures. 
  This 
  band 
  is 
  not 
  in 
  fiict 
  at 
  the 
  suture, 
  but 
  just 
  below 
  the 
  

   coronation 
  of 
  the 
  whorls, 
  the 
  latter 
  portion 
  and 
  the 
  channelled 
  top 
  

   being 
  coloured 
  like 
  the 
  greater 
  part 
  of 
  the 
  shell. 
  This 
  stylo 
  of 
  

   paintiiig 
  is 
  far 
  from 
  constant. 
  Two 
  specimens 
  presented 
  to 
  the 
  

   British 
  Museum 
  by 
  A. 
  Adams, 
  Esq., 
  lack 
  the 
  conspicuous 
  white 
  

   baud, 
  but 
  have 
  the 
  entire 
  surface 
  covered 
  with 
  oblique, 
  slightly 
  

   wavy, 
  pinkish-brown 
  stripes, 
  resting 
  upon 
  a 
  pinky-wJiite 
  ground. 
  

   A 
  single 
  specimen 
  dredged 
  by 
  Dr. 
  Coppinger 
  at 
  Port 
  Curtis 
  exhibits 
  

   the 
  typical 
  coloration, 
  with 
  the 
  exception 
  of 
  having 
  a 
  second 
  white 
  

   transverse 
  zone 
  just 
  below 
  the 
  periphery 
  of 
  the 
  last 
  volution. 
  

   Another 
  example 
  from 
  Friday 
  Island 
  more 
  nearly 
  resembles 
  the 
  

   variety 
  previously 
  mentioned 
  ; 
  but 
  the 
  oblique 
  stripes 
  are 
  less 
  

   regular, 
  being 
  more 
  interrupted 
  and 
  in 
  the 
  form 
  of 
  spots. 
  

  

  Mr. 
  Adams 
  describes 
  the 
  inner 
  lip 
  of 
  this 
  genus 
  as 
  " 
  straight, 
  

   forming 
  an 
  angle 
  with 
  the 
  outer 
  lip." 
  This 
  description 
  is 
  scarcely 
  

   accurate. 
  All 
  the 
  specimens 
  which 
  I 
  have 
  examined 
  have 
  the 
  

   columella 
  a 
  little 
  oblique, 
  slightly 
  incurved 
  at 
  the 
  upper 
  part 
  and 
  

   middle, 
  and 
  then 
  prominent 
  anteriorly, 
  terminating 
  in 
  an 
  indistinct 
  

   subtruneation, 
  or, 
  in 
  other 
  words, 
  it 
  is 
  subnotched 
  at 
  the 
  base 
  at 
  the 
  

   termination 
  of 
  the 
  double 
  series 
  of 
  tubercles 
  surrounding 
  the 
  umbi- 
  

   licus. 
  It 
  is 
  very 
  slightly 
  expanded 
  and 
  connected 
  with 
  the 
  upper 
  

   extremity 
  of 
  the 
  outer 
  lip 
  by 
  a 
  thin 
  callosity 
  (which 
  is 
  subtubercular 
  

   in 
  adult 
  shells) 
  upon 
  the 
  whorl 
  close 
  to 
  the 
  end 
  of 
  the 
  columella. 
  

   The 
  aperture 
  has 
  a 
  thin 
  coating 
  of 
  nacre, 
  which 
  in 
  worn 
  shells 
  is 
  

   not 
  very 
  apparent. 
  

  

  89. 
  Trochus 
  (Calliostoma) 
  speciosa. 
  

  

  Ziziphinus 
  speciosus, 
  A, 
  Adams, 
  Proc. 
  Zool. 
  Soc. 
  1854, 
  p. 
  38 
  ; 
  Peeve, 
  

   Conch. 
  Icon., 
  Zizyphiuus, 
  sp. 
  9, 
  figs. 
  9 
  a, 
  h. 
  

  

  Hah. 
  Port 
  Curtis, 
  Queensland, 
  1-\\ 
  ims,. 
  {Coppinger) 
  \ 
  Morcton 
  

   Bay 
  {Mr. 
  Strange). 
  

  

  In 
  form 
  this 
  species 
  a])proachcs 
  7'. 
  couitus 
  of 
  Phi]ij)pi, 
  whicli, 
  

   however, 
  in 
  addition 
  to 
  difference 
  in 
  colour, 
  does 
  not 
  possess 
  the 
  

   peculiar 
  smooth 
  orange-yellow 
  callosity 
  at 
  the 
  umbilical 
  region 
  so 
  

  

  