﻿110 
  COLLECTIONS 
  PEOM 
  MELANESIA. 
  

  

  56. 
  ? 
  Area 
  imbricata. 
  

  

  Bnu/uih'e 
  ; 
  Reeve, 
  Conch. 
  Icon. 
  fig. 
  73. 
  

  

  Hah. 
  Port 
  Molle, 
  Queensland, 
  12 
  fms. 
  {Coppinger) 
  ; 
  Geelong, 
  

   Port 
  Philip 
  {Mus. 
  Cuming) 
  ; 
  Port 
  Essington 
  and 
  N.E. 
  Australia 
  

   {Brit. 
  Mus.). 
  

  

  The 
  specimens 
  from 
  the 
  above 
  localities 
  belong 
  to 
  one 
  species, 
  

   and 
  so 
  closely 
  resemble, 
  with 
  the 
  exception 
  of 
  colour, 
  West-Indian 
  

   examples 
  of 
  this 
  species, 
  that 
  I 
  hesitate 
  to 
  separate 
  them 
  specifi- 
  

   cally, 
  I 
  fail 
  to 
  discover 
  any 
  good 
  distinctions 
  between 
  A. 
  cunealis, 
  

   Eeeve, 
  A. 
  kraussi, 
  Philippi, 
  and 
  A. 
  imbricata 
  = 
  A. 
  umbonata, 
  Lamarck, 
  

   except 
  that 
  the 
  two 
  former 
  generally, 
  but 
  not 
  always, 
  have 
  more 
  

   rhomboidal 
  grooves 
  on 
  the 
  ligament. 
  

  

  57. 
  Area 
  (Barbatia) 
  lima. 
  

  

  Area 
  lima, 
  Heeve, 
  Conch. 
  Icon. 
  fig. 
  101. 
  

  

  Hob. 
  Port 
  MoUc, 
  14 
  fms., 
  and 
  Thursday 
  Island, 
  2-6 
  fms. 
  ( 
  Cop- 
  

   pinger) 
  ; 
  Burias 
  and 
  Corrigidor, 
  Philippines 
  ( 
  Cuming). 
  

  

  " 
  Light 
  brown, 
  stained 
  with 
  brown, 
  spotted 
  with 
  brown, 
  pos- 
  

   teriorly 
  covered 
  with 
  a 
  thin, 
  very 
  fine 
  bristly 
  epidermis." 
  Such 
  is 
  

   the 
  erroneous 
  description 
  given 
  by 
  Eeeve 
  of 
  this 
  sj)ecies. 
  It 
  is, 
  in 
  

   fact, 
  a 
  purely 
  white 
  shell 
  throughout, 
  and 
  all 
  the 
  brown 
  stains 
  and 
  

   spots 
  are 
  merely 
  the 
  remains 
  of 
  the 
  epidermis. 
  The 
  entire 
  surface 
  

   is 
  ornamented 
  with 
  very 
  numerous 
  close-set 
  fine 
  radiating 
  riblets, 
  

   which 
  are 
  finely 
  granular, 
  the 
  granules 
  so 
  placed 
  as 
  to 
  form 
  con- 
  

   centric 
  series. 
  About 
  half 
  a 
  dozen 
  of 
  the 
  costfe 
  down 
  the 
  posterior 
  

   side 
  and 
  a 
  few 
  at 
  the 
  anterior 
  end 
  are 
  thicker 
  than 
  the 
  rest 
  on 
  the 
  

   central 
  portion 
  of 
  the 
  valve, 
  aud 
  consequently 
  have 
  larger 
  granules, 
  

   those 
  behind 
  being 
  further 
  apart 
  also. 
  The 
  few 
  ribs 
  towards 
  the 
  

   middle 
  being 
  duplicate, 
  as 
  stated 
  by 
  Reeve, 
  is 
  an 
  individual 
  rather 
  

   than 
  a 
  specific 
  character. 
  The 
  interior 
  is 
  white, 
  and 
  the 
  margin 
  

   crenulated, 
  the 
  crenulation 
  corresponding 
  in 
  coarseness 
  with 
  the 
  

   radiating 
  costa3. 
  

  

  58, 
  Area 
  (Barbatia) 
  tenebrica. 
  

   Area 
  teuebrica, 
  Reeve, 
  Conch. 
  Icon. 
  fig. 
  105. 
  

  

  Hah. 
  Samar, 
  Philippines 
  ( 
  Cuming) 
  ; 
  Port 
  Essington 
  ( 
  Capt. 
  Wiclc- 
  

   Jiam 
  in 
  Brit. 
  Mus.) 
  ; 
  Port 
  Curtis 
  {Dr. 
  Coppinger) 
  ; 
  Bombay 
  {Mus. 
  

   Cuming). 
  

  

  The 
  surface 
  of 
  this 
  species 
  is 
  minutely 
  reticulated 
  with 
  exces- 
  

   sively 
  fine 
  radiating 
  and 
  concentric 
  liroe, 
  of 
  which 
  the 
  former 
  are 
  

   the 
  coarser, 
  subgranular, 
  and 
  generally 
  alternating 
  finer 
  aud 
  coarser. 
  

   The 
  valves 
  exhibit 
  an 
  indication 
  of 
  a 
  faint 
  depression 
  down 
  the 
  

   middle, 
  from 
  the 
  umbo 
  to 
  the 
  centre 
  of 
  the 
  ventral 
  margin, 
  which 
  

   in 
  some 
  specimens 
  is 
  slightly 
  incurved 
  or 
  siiuiatcd 
  at 
  that 
  part. 
  It 
  

   is 
  also 
  thickened 
  within, 
  smooth, 
  and 
  rounded. 
  

  

  The 
  interior 
  is 
  bluish 
  white 
  aud 
  radiately 
  striated, 
  the 
  striie 
  being 
  

  

  