﻿676 
  EXPLANATION 
  OF 
  THE 
  PLATES. 
  

  

  Fig. 
  p. 
  EiiliinQcUctyiim 
  gloimratum, 
  spicules, 
  x 
  190. 
  From 
  type 
  

   specimen 
  from 
  Tliursday 
  Island. 
  

  

  5. 
  E. 
  cancellatum, 
  spicules, 
  x 
  190. 
  From 
  specimen 
  figured 
  

   PI. 
  XL. 
  fig. 
  D. 
  

  

  r. 
  E. 
  costiferum, 
  spicules, 
  x 
  190. 
  From 
  specimen 
  from 
  Port 
  

   Molle. 
  

  

  s. 
  Leucopliloeus 
  fenestratus, 
  part 
  of 
  vertical 
  section 
  from 
  type 
  

   specimen, 
  x 
  38. 
  

  

  t. 
  Am_philectus 
  tibiellifer, 
  skeleton 
  acuate 
  and 
  tibella 
  and 
  

   tricurvate 
  acerate 
  spicules, 
  x 
  190. 
  t', 
  head 
  of 
  tibiella, 
  

   and 
  t", 
  equianchorate 
  as 
  seen 
  from 
  front 
  and 
  side, 
  x 
  370. 
  

   From 
  type 
  specimen 
  from 
  Torres 
  Straits. 
  

  

  Plate 
  XLIII. 
  

  

  Fig. 
  a. 
  Axinella 
  ecJddncea. 
  Spicules, 
  x 
  68. 
  From 
  dry 
  specimen 
  

   from 
  Tliursday 
  Island. 
  

  

  b. 
  Geoclia 
  globostellifera, 
  globostellate, 
  external 
  and 
  internal 
  

  

  stellate 
  spicules, 
  in 
  tissue 
  below 
  dermal 
  crust, 
  x 
  370. 
  V. 
  

   Portion 
  of 
  cortex, 
  showing 
  crust 
  of 
  balls 
  covered 
  by 
  mem- 
  

   brane 
  containiog 
  smaller 
  stellates, 
  and 
  tuft 
  of 
  surface 
  

   acerate 
  spicules 
  projecting 
  from 
  it, 
  x 
  68. 
  

  

  c. 
  Spirastrclla 
  decumbens. 
  Spicules, 
  x 
  190. 
  From 
  type 
  

  

  specimen 
  from 
  Alert 
  Island. 
  

  

  d. 
  iS. 
  conijcnera, 
  skeletal 
  spinulate 
  spicules, 
  showing 
  two 
  forms 
  

  

  of 
  head, 
  x 
  190. 
  d'. 
  Flesh-spicules, 
  x 
  370. 
  From 
  type 
  

   specimen 
  from 
  Thursday 
  Island. 
  

  

  e. 
  S. 
  vagabunda, 
  skeletal 
  spinulate 
  spicule, 
  X 
  190. 
  e'. 
  Flesh- 
  

  

  spicules, 
  X 
  370. 
  From 
  specimen 
  from 
  Torres 
  Straits. 
  

  

  f. 
  Hymeniacidon 
  agrninata, 
  spicules, 
  x 
  190. 
  /.' 
  Head 
  of 
  spinu- 
  

  

  late 
  spicules, 
  X 
  370. 
  From 
  type 
  specimen 
  from 
  Port 
  Jackson, 
  

  

  g. 
  Leucopldoeun 
  fenestratus, 
  var. 
  Spicule, 
  x 
  68. 
  

  

  h. 
  Sidjer'itcs 
  epijjliytum, 
  vertical 
  section, 
  x 
  68. 
  li, 
  spicule 
  

   X 
  68 
  ; 
  7i", 
  head 
  of 
  spicule, 
  chief 
  forms, 
  x370. 
  From 
  

   spirit-specimen 
  from 
  Port 
  Curtis. 
  

  

  