﻿Tenison- 
  Woods. 
  — 
  On 
  a 
  new 
  Species 
  of 
  Millepora. 
  345 
  

  

  Art. 
  XL. 
  — 
  On 
  a 
  new 
  Species 
  of 
  Millepora. 
  By 
  tlie 
  Eev. 
  J. 
  E. 
  Tenison- 
  

   WooDS, 
  P.L.S., 
  F.G.S., 
  Corr. 
  Mem. 
  Roy. 
  Soc. 
  Victoria, 
  Tasmania, 
  

   Limi. 
  Soc. 
  N.S.W. 
  ; 
  Hon. 
  Mem. 
  Roy. 
  Soc. 
  N.S.W., 
  Adelaide 
  Phil. 
  

   Soc, 
  etc., 
  etc. 
  Communicated 
  by 
  Prof. 
  Hutton, 
  

  

  [Read 
  before 
  the 
  Otaijo 
  Institute, 
  10th 
  September, 
  1878.] 
  

   The 
  specimen 
  to 
  wliicli 
  I 
  liave 
  the 
  honour 
  to 
  call 
  the 
  attention 
  of 
  the 
  

   Society 
  was 
  sent 
  to 
  me 
  by 
  my 
  friend 
  Captain 
  F. 
  W. 
  Hutton, 
  of 
  Otago, 
  and 
  

   was 
  stated 
  to 
  have 
  been 
  found 
  in 
  Foveaux 
  Strait 
  ; 
  but 
  the 
  depth 
  at 
  which 
  

   it 
  occurred 
  and 
  its 
  station 
  were 
  not 
  stated. 
  It 
  is 
  a 
  tufted 
  zoothome 
  of 
  

   highly 
  reticulate 
  structure, 
  but 
  hard 
  and 
  compact. 
  It 
  grows 
  apparently 
  

   in 
  a 
  solid 
  mass, 
  from 
  which 
  pencil-like 
  cylindrical 
  stones 
  grow 
  out 
  verti- 
  

   cally, 
  to 
  a 
  height 
  of 
  two 
  or 
  three 
  inches, 
  but 
  not 
  more 
  than 
  a 
  third 
  of 
  an 
  

   inch 
  in 
  diameter. 
  On 
  examining 
  the 
  surface 
  with 
  the 
  microscope, 
  it 
  is 
  seen 
  

   to 
  be 
  covered 
  with 
  minute 
  rounded 
  pores, 
  which 
  liave 
  an 
  exact, 
  thickened, 
  

   very 
  slightly 
  raised 
  margin. 
  These 
  pores 
  are 
  very 
  close 
  to 
  one 
  another, 
  

   but 
  there 
  are 
  interstices 
  which 
  are 
  occupied 
  by 
  much 
  smaller 
  pores, 
  which 
  

   are 
  in 
  fact 
  nothing 
  but 
  the 
  polygonal 
  spaces 
  left 
  between 
  the 
  closely- 
  

   crowded 
  tubes. 
  When 
  a 
  fragment 
  is 
  broken 
  across, 
  two 
  different 
  kinds 
  of 
  

   structure 
  are 
  observed. 
  One 
  is 
  a 
  kind 
  of 
  outer 
  ring, 
  on 
  which 
  a 
  radiate 
  

   arrangement 
  of 
  the 
  tubes 
  is 
  preserved, 
  that 
  is 
  to 
  say 
  radiatiug 
  from 
  the 
  

   axis 
  to 
  the 
  circumference 
  ; 
  the 
  other 
  is 
  a 
  central 
  cancellous 
  tissue, 
  made 
  up 
  

   of 
  tubes 
  exactly 
  like 
  the 
  surface, 
  but 
  the 
  walls 
  more 
  delicate. 
  The 
  outer 
  

   radiate 
  ring 
  of 
  tubes 
  is 
  about 
  one-fifth 
  of 
  the 
  diameter; 
  the 
  remaining 
  four- 
  

   fifths 
  is 
  occupied 
  by 
  the 
  central 
  tissue. 
  The 
  latter 
  is 
  of 
  different 
  colour, 
  

   or 
  blueish 
  white, 
  while 
  the 
  outer 
  ring 
  is 
  a 
  reddish-brown. 
  The 
  tubes, 
  which 
  

   open 
  on 
  the 
  outer 
  surface, 
  are 
  not 
  more 
  than 
  half 
  a 
  millimeter 
  in 
  depth, 
  

   but 
  it 
  is 
  not 
  at 
  first 
  very 
  clear 
  whether 
  they 
  are 
  closed 
  by 
  tapering 
  to 
  a 
  

   point 
  or 
  whether 
  they 
  curve 
  downwards 
  or 
  upwards, 
  and 
  so 
  join 
  the 
  

   cancellous 
  tissue 
  or 
  pith, 
  as 
  it 
  might 
  be 
  termed, 
  of 
  the 
  centre. 
  The 
  tubes 
  

   of 
  the 
  centre 
  seem 
  to 
  be 
  continuous. 
  A 
  hair 
  can 
  be 
  easily 
  passed 
  down 
  

   them 
  for 
  half 
  an 
  inch 
  or 
  more. 
  When 
  a 
  section 
  is 
  made 
  it 
  is 
  then 
  clearly 
  

   seen 
  that 
  the 
  tubes 
  curve 
  downwards, 
  and 
  are 
  crossed 
  from 
  time 
  to 
  time 
  

   by 
  tabula3 
  or 
  partitions, 
  which 
  are 
  few 
  in 
  number 
  and 
  wide 
  apart. 
  

  

  All 
  these 
  details 
  point 
  very 
  decidedly 
  to 
  the 
  nature 
  of 
  the 
  organism 
  with 
  

   which 
  we 
  have 
  to 
  deal. 
  It 
  is 
  a 
  Millepore, 
  but 
  of 
  an 
  exceptional 
  and 
  peculiar 
  

   type. 
  Until 
  very 
  lately 
  these 
  singular 
  corals 
  were 
  ranged 
  amidst 
  the 
  

   Madreporaria 
  tabulata. 
  Their 
  true 
  character 
  was, 
  however, 
  discovered 
  by 
  

   Agassiz 
  on 
  one 
  of 
  his 
  cruises 
  to 
  the 
  reefs 
  of 
  Florida. 
  Prof. 
  Dana 
  says 
  that 
  

   he 
  often 
  had 
  MiUepore 
  corals 
  under 
  study 
  in 
  the 
  Pacific, 
  and 
  waited 
  long 
  

   for 
  the 
  expansion 
  of 
  the 
  animals, 
  but 
  was 
  never 
  gratified 
  by 
  their 
  making 
  

  

  aU 
  

  

  