﻿70 
  A 
  MONOGRAPH 
  OF 
  THE 
  VICTORIAN 
  SPONGES. 
  

  

  LeiLcosokiiiapulchcn-iiiia,y^\i\\\A\n:\i 
  species 
  I 
  sliould 
  be 
  inclined 
  to 
  identify 
  it 
  were 
  it 
  

   not 
  for 
  the 
  great 
  difference 
  in 
  the 
  size 
  of 
  the 
  spicules 
  and 
  the 
  absence 
  of 
  any 
  

   information 
  as 
  to 
  the 
  shape 
  of 
  the 
  spicule-rays 
  in 
  Lencosolenia 
  oscitluui. 
  

  

  The 
  specimens 
  upon 
  which 
  Mr. 
  Carter's 
  description 
  is 
  based 
  formed 
  part 
  of 
  the 
  

   collection 
  sent 
  to 
  him 
  by 
  Mr. 
  J. 
  Bracebridge 
  Wilson 
  from 
  the 
  neighbom'hood 
  of 
  Port 
  

   Phillip 
  Heads. 
  

  

  2. 
  hcucosolciiia 
  {?) 
  lauiinoclathrata^ 
  Carter, 
  sp. 
  

  

  Clathrina 
  laminoclathrata, 
  Carter. 
  Annals 
  and 
  Magazine 
  of 
  Natural 
  History. 
  

   Jmie, 
  1886, 
  p. 
  509. 
  

  

  " 
  Specimen 
  a 
  subcircular 
  patch 
  about 
  :] 
  in. 
  in 
  diameter 
  and 
  rl 
  in. 
  thick, 
  which 
  has 
  grown 
  over 
  a 
  rocky 
  substance. 
  

   Clatbrous, 
  massive, 
  sessile, 
  ppreading, 
  lainiiio-ieticulate. 
  Colour 
  now 
  (tbat 
  is 
  in 
  its 
  dry 
  state) 
  steel-grey. 
  Surface 
  even, 
  

   smooth, 
  reticulated 
  by 
  the 
  clatlirous 
  holing 
  of 
  the 
  structure 
  generally, 
  which 
  here 
  makes 
  its 
  appearance 
  in 
  the 
  form 
  of 
  

   circular 
  interstices 
  of 
  different 
  sizes 
  up 
  to 
  --h 
  in. 
  in 
  diameter. 
  Pores 
  in 
  the 
  lamina. 
  No 
  appearance 
  of 
  a 
  vent 
  or 
  vents 
  

   of 
  any 
  kind, 
  i.e. 
  spurious 
  or 
  real. 
  Structure 
  laminoclatbrous 
  ; 
  lamina 
  solid, 
  composed 
  of 
  a 
  thin 
  layer 
  of 
  radiate 
  spicules 
  

   supporting 
  the 
  sarcode 
  and 
  other 
  soft 
  parts. 
  Spicules 
  of 
  one 
  form 
  only, 
  viz. 
  triradiate, 
  equiarmed 
  and 
  e(|uiangled, 
  varying 
  

   in 
  size 
  under 
  75-6000ths 
  in. 
  in 
  diameter, 
  ray 
  alone 
  about 
  45 
  by 
  5-6000tbs 
  in. 
  Size 
  above 
  given. 
  

  

  " 
  Ohs. 
  In 
  this 
  instance, 
  which 
  is 
  unique 
  among 
  the 
  calcareous 
  sponges 
  so 
  far 
  as 
  I 
  know, 
  the 
  tubulated 
  staple 
  thread 
  

   of 
  Clathrina, 
  which 
  so 
  generally 
  characterizes 
  this 
  genus, 
  is 
  replaced 
  by 
  a 
  flat, 
  solid, 
  ' 
  tape-like 
  ' 
  form 
  or 
  staple, 
  whose 
  

   edge 
  when 
  cut 
  presents 
  no 
  appear 
  ance 
  of 
  mesodermal 
  structure 
  or 
  parenchyma 
  whatever, 
  although 
  towards 
  the 
  angles 
  of 
  

   union, 
  where 
  of 
  course 
  the 
  lamina 
  branches 
  off 
  to 
  form 
  the 
  clathi'ous 
  structure 
  of 
  the 
  mass, 
  there 
  is 
  a 
  small 
  angular 
  

   space 
  left 
  which 
  bears 
  a 
  faint 
  trace 
  of 
  parenchyma, 
  and 
  this 
  seems 
  to 
  introduce 
  us 
  to 
  what 
  in 
  this 
  way 
  will 
  become 
  so 
  

   much 
  more 
  evident 
  hereafter. 
  It 
  is 
  represented 
  among 
  the 
  non-calcareous 
  sponges 
  by 
  ' 
  Echinoclathria 
  favus.' 
  ('Annals,' 
  

   1885, 
  vol. 
  XVI., 
  p. 
  292.) 
  

  

  "In 
  the 
  next 
  species 
  that 
  will 
  be 
  described, 
  viz., 
  Clathrina 
  priinordialis, 
  the 
  reticulated 
  fiat 
  lamina 
  of 
  C. 
  

   laminoclathrata 
  appears 
  to 
  be 
  replaced 
  by 
  a 
  vermioulated 
  tube, 
  in 
  which 
  the 
  walls 
  are 
  just 
  as 
  thin 
  as 
  the 
  lamina 
  of 
  this 
  

   species, 
  but 
  which 
  tubulation 
  by 
  repeated 
  branching, 
  contortion, 
  and 
  anastomosis, 
  all 
  more 
  or 
  less 
  in 
  apposition, 
  assumes 
  

   the 
  form 
  of 
  a 
  solid 
  mass 
  of 
  tliis 
  kind 
  of 
  structure 
  in 
  which 
  the 
  intervals 
  between 
  the 
  tubulation 
  afford 
  a 
  much 
  larger 
  

   space 
  for 
  parenchymatous 
  structure 
  than 
  in 
  C. 
  laminoclathrata 
  ; 
  in 
  short, 
  wherein 
  the 
  quantity 
  of 
  parenchymatous 
  structure 
  

   is 
  much 
  greater." 
  

  

  The 
  specimen 
  here 
  described 
  was 
  sent 
  by 
  Mr. 
  Wilson 
  from 
  the 
  neighbourhood 
  

   of 
  Port 
  Phillip 
  Heads 
  to 
  Mr. 
  Carter. 
  In 
  considering 
  the 
  description 
  we 
  must 
  

   remember 
  that 
  it 
  is 
  based 
  upon 
  a 
  small, 
  dry 
  specimen, 
  in 
  which 
  probably 
  the 
  walls 
  of 
  

   the 
  Ascon-tubes 
  had 
  collapsed 
  together 
  so 
  as 
  to 
  form 
  a 
  sohd 
  thread, 
  so 
  that 
  very 
  

   likely 
  Mr. 
  Carter 
  was 
  misled 
  in 
  this 
  case 
  precisely 
  as 
  he 
  had 
  been 
  previously 
  misled 
  

   in 
  the 
  case 
  of 
  his 
  Leucetta 
  dathrata 
  {vide 
  supra 
  p. 
  68). 
  Unfortunately 
  I 
  have 
  neither 
  

   specimens 
  nor 
  figures 
  of 
  the 
  species 
  to 
  assist 
  me 
  in 
  arriving 
  at 
  a 
  true 
  conclusion 
  as 
  

   to 
  its 
  real 
  nature, 
  but 
  I 
  think 
  there 
  can 
  be 
  little 
  doubt 
  that 
  the 
  species 
  must 
  be 
  

   abandoned. 
  

  

  3. 
  Lencosolenia 
  {?) 
  sycandra, 
  von 
  Lendenfeld, 
  sp. 
  

  

  Homoderma 
  sycandra, 
  von 
  Lendenfeld. 
  Proceedings 
  of 
  the 
  Linnean 
  Society 
  of 
  

   New 
  South 
  Wales. 
  Vol. 
  IX., 
  Part 
  4, 
  p. 
  1088. 
  

  

  