﻿8P0NGIIBA. 
  465 
  

  

  SUBERITID^. 
  

  

  Suberitida, 
  Carter, 
  Ann. 
  ^ 
  Mag. 
  N. 
  H. 
  1875, 
  xvi. 
  p. 
  133. 
  

  

  No 
  strikingly 
  new 
  form 
  occurs 
  in 
  this 
  group. 
  It 
  is 
  remarkable 
  

   that 
  from 
  so 
  large 
  an 
  Australian 
  collection 
  Tethi/a 
  is 
  altogether 
  

   absent, 
  though 
  Dr. 
  Bowerbank 
  long 
  since 
  showed 
  that 
  it 
  is 
  well 
  

   established 
  in 
  these 
  seas. 
  

  

  93. 
  Suljerites 
  carnosus. 
  

  

  Halichondria 
  carnosa, 
  Johnston, 
  Brit. 
  Spong. 
  p. 
  146, 
  pi. 
  xiii. 
  figa. 
  

  

  7 
  &8. 
  

  

  Two 
  specimens 
  undistinguishable 
  from 
  British 
  specimens 
  of 
  this 
  

   common 
  species. 
  Mr. 
  Carter 
  has 
  recorded 
  its 
  occurrence 
  at 
  Ker- 
  

   guelen 
  Island 
  (Phil. 
  Trans, 
  clxviii. 
  p. 
  287). 
  The 
  present 
  specimens 
  

   are 
  greenish 
  white 
  in 
  spirit 
  and 
  irregularly 
  lobate 
  in 
  shape 
  ; 
  

   one 
  appears 
  to 
  have 
  been 
  attached 
  by 
  the 
  base, 
  the 
  others 
  to 
  

   have 
  been 
  quite 
  unattached. 
  The 
  spicules 
  have 
  a 
  suboval 
  head, 
  

   the 
  free 
  end 
  projecting 
  slightly 
  beyond 
  the 
  actual 
  enlargement 
  

   of 
  the 
  head, 
  and 
  measure 
  '28 
  to 
  '57 
  by 
  "0063 
  millim. 
  (the 
  spi- 
  

   cules 
  of 
  the 
  Johnstonian 
  type 
  measure 
  '45 
  by 
  '0063 
  miUim., 
  and 
  

   have 
  a 
  similarly 
  formed 
  head). 
  The 
  arrangement 
  of 
  the 
  skeleton- 
  

   fascicles 
  is 
  also 
  closely 
  similar, 
  the 
  greater 
  distance 
  between 
  them 
  

   in 
  the 
  present 
  specimens 
  being 
  probably 
  due 
  to 
  the 
  more 
  natural 
  

   conditions 
  retained 
  by 
  preservation 
  in 
  spirit. 
  

  

  Hah, 
  Port 
  Jackson, 
  0-5 
  fms. 
  

  

  Distribution. 
  British 
  Islands 
  (Boiverbank). 
  

  

  94. 
  Suherites 
  epiphytum. 
  

   Alcyonium 
  epiphytum, 
  Lamarck, 
  Mem. 
  Mtis. 
  Hist. 
  Nat. 
  i. 
  p. 
  163. 
  

  

  Lamarck's 
  species, 
  as 
  I 
  have 
  ascertained 
  from 
  the 
  original 
  speci- 
  

   men 
  in 
  the 
  Museum 
  at 
  the 
  Jardin 
  des 
  Plantes, 
  is 
  a 
  Suberites 
  coating 
  

   a 
  fucus 
  with 
  a 
  thin 
  lamina 
  of 
  sponge 
  (in 
  which 
  are 
  imbedded 
  a 
  

   number 
  of 
  spinulate 
  spicules 
  whose 
  heads 
  rest 
  for 
  the 
  most 
  part 
  

   almost 
  directly 
  on 
  the 
  supporting 
  fucus, 
  while 
  their 
  points 
  project 
  

   freely 
  to 
  the 
  exterior). 
  There 
  is 
  no 
  flesh-spicule. 
  The 
  spinulate 
  

   skeleton-spicule 
  is 
  generally 
  curved, 
  and 
  gradually 
  tapers 
  to 
  a 
  sharp 
  

   point 
  ; 
  the 
  head 
  is 
  transversely 
  elongated, 
  the 
  side 
  at 
  which 
  it 
  is 
  

   attached 
  to 
  the 
  shaft 
  being 
  flat, 
  and 
  the 
  free 
  end 
  curved, 
  but 
  more 
  

   gradually 
  than 
  the 
  lateral 
  parts 
  (in 
  fact 
  the 
  shape 
  is 
  nearly 
  that 
  of 
  

   the 
  head 
  of 
  the 
  spicule 
  of 
  Caidosponyia., 
  Kent, 
  which 
  Mr. 
  Carter 
  has 
  

   graphically 
  compared 
  to 
  a 
  door-handle) 
  ; 
  the 
  head 
  is 
  not 
  unfre- 
  

   quently 
  surmounted 
  by 
  a 
  slight 
  prominence 
  (marking 
  the 
  aborted 
  

   second 
  ray, 
  if 
  the 
  spinulate 
  spicule 
  is 
  to 
  be 
  regarded 
  as 
  a 
  uniaxial, 
  

   biradiate 
  spicule, 
  with 
  one 
  ray 
  aborted). 
  In 
  the 
  type 
  specimen 
  

   there 
  is 
  some 
  dark 
  granular 
  matter 
  between 
  the 
  spicules. 
  The 
  

  

  2ii 
  

  

  