﻿SPONGllDA. 
  439 
  

  

  lateral 
  margins 
  reverted 
  at 
  upper 
  end 
  ; 
  tubercle 
  strong, 
  ovaJ 
  ; 
  breadth 
  

   and 
  length 
  of 
  small 
  end 
  about 
  half 
  those 
  of 
  larger 
  end 
  ; 
  length 
  of 
  

   spicule 
  -llJ 
  millira. 
  (3) 
  Small 
  inequianchorate 
  ; 
  shaft 
  slender, 
  sharply 
  

   bent 
  at 
  about 
  middle 
  ; 
  larger 
  end 
  about 
  three 
  fourths 
  of 
  total 
  length 
  

   of 
  spicule 
  in 
  length 
  and 
  about 
  half 
  that 
  amount 
  in 
  breadth 
  ; 
  the 
  lateral 
  

   arms 
  as 
  seen 
  from 
  front 
  finely 
  curved 
  and 
  forming 
  long 
  wing- 
  like 
  

   processes, 
  pointed 
  below 
  and 
  excavated 
  on 
  their 
  inferior 
  and 
  inner 
  

   aspects, 
  reaching 
  almost 
  to 
  the 
  upper 
  edge 
  of 
  the 
  smaller 
  end 
  of 
  the 
  

   spicule 
  ; 
  their 
  curve 
  coincides 
  with 
  that 
  of 
  the 
  lower 
  end 
  : 
  smaller 
  

   end 
  like 
  that 
  of 
  the 
  large 
  inequianchorate, 
  but 
  truncate 
  at 
  its 
  distal 
  

   extremity 
  ; 
  length 
  of 
  spicule 
  -032 
  millim. 
  (4) 
  Eihamate, 
  contort, 
  

   slender, 
  curve 
  wide, 
  points 
  sharp 
  ; 
  size 
  •057 
  by 
  '0032 
  millim. 
  

   (5) 
  Trichites, 
  in 
  sheaves 
  of 
  10 
  to 
  20 
  or 
  30 
  : 
  finely 
  pointed, 
  appa- 
  

   rently 
  straight, 
  each 
  about 
  -032 
  long 
  by 
  -00 
  16 
  millim. 
  thick 
  ; 
  very 
  

   abundant 
  in 
  some 
  parts 
  of 
  dermal 
  membrane. 
  

  

  Hub. 
  Thursday 
  Island, 
  Torres 
  Straits, 
  4-6 
  fms. 
  ; 
  bottom 
  rock 
  and 
  

   sand. 
  

  

  Distribatioa. 
  Freemantle, 
  S.W. 
  Australia 
  {Carter) 
  '1 
  ; 
  Indian 
  

   Ocean 
  (ScJimidf) 
  ? 
  

  

  The 
  larger 
  piece 
  is 
  43 
  millim. 
  (1| 
  inch) 
  long, 
  by 
  20 
  millim. 
  (| 
  inch) 
  

   broad, 
  by 
  10 
  millim. 
  thick 
  ; 
  it 
  is 
  uncertiiin 
  whether 
  it 
  ever 
  had 
  an 
  

   independent 
  stem 
  or 
  whether 
  it 
  depended 
  for 
  attachment 
  on 
  the 
  frag- 
  

   ments 
  of 
  shells 
  etc. 
  which 
  it 
  involves 
  in 
  its 
  substance, 
  or 
  on 
  fixed 
  

   foreign 
  bodies 
  ; 
  the 
  smaller 
  piece 
  is 
  similar 
  in 
  its 
  relations, 
  and 
  

   perhaps 
  both 
  originally 
  formed 
  part 
  of 
  one 
  specimen. 
  

  

  The 
  large 
  anchorate 
  strongly 
  resembles 
  that 
  figured 
  by 
  Schmidt 
  

   (?. 
  c. 
  supra) 
  as 
  belonging 
  to 
  " 
  eine 
  indische 
  Esperie," 
  named 
  Mycale 
  

   f/randis 
  by 
  Gray 
  (I.e.), 
  in 
  the 
  form 
  of 
  its 
  larger 
  end, 
  although 
  the 
  

   anterior 
  palm 
  is 
  relatively 
  larger 
  than 
  in 
  that 
  form, 
  while 
  the 
  middle 
  

   palm 
  of 
  the 
  lower 
  end 
  is 
  far 
  smaller 
  relatively 
  to 
  the 
  spicule 
  and 
  

   to 
  the 
  lateral 
  palms 
  than 
  in 
  Schmidt's 
  anchorate 
  ; 
  but 
  it 
  seems 
  likely 
  

   from 
  its 
  appearance 
  that 
  the 
  lower 
  end 
  of 
  the 
  spicule 
  was 
  imper- 
  

   fectly 
  developed 
  in 
  the 
  example 
  figured 
  by 
  Schmidt. 
  The 
  spicule 
  

   was 
  even 
  larger 
  than 
  that 
  of 
  our 
  species, 
  viz. 
  "145 
  millim. 
  long, 
  

   according 
  to 
  Schmidt's 
  measurement, 
  Gray's 
  species 
  is 
  based 
  simply 
  

   on 
  that 
  author's 
  description 
  of 
  the 
  spicule. 
  

  

  PHOmOSPONGIA. 
  

  

  Marshall, 
  Zeitschr. 
  iviss. 
  Zool. 
  xxxv. 
  p. 
  122. 
  

  

  The 
  striking 
  structural 
  character 
  on 
  which 
  this 
  genus 
  was 
  

   founded 
  receives 
  confirmation 
  and 
  illustration 
  from 
  the 
  following 
  

   species: 
  I 
  have 
  referred 
  to 
  it 
  as 
  occurring 
  in 
  Clathria 
  (Microciona) 
  

   tuberosa, 
  Bowerbank 
  (see 
  p. 
  444). 
  FUmlaria 
  anchorata. 
  Carter, 
  from 
  

   Antigua 
  (Ann, 
  & 
  Mag. 
  N, 
  H, 
  1882, 
  ix, 
  p. 
  283), 
  is 
  perhaps 
  a 
  Phorio- 
  

   sponrjia. 
  

  

  72. 
  Phoriospongia 
  fibrosa. 
  (Plate 
  XLII. 
  fig. 
  ^.) 
  

   Massive, 
  sessile, 
  irregularly 
  shaped; 
  surface 
  uneven, 
  with 
  irregular 
  

  

  