﻿EXPLANATION 
  OF 
  THE 
  PLATES. 
  673 
  

  

  Fig. 
  n. 
  Toxochalina 
  rohusta, 
  portion 
  of 
  skeleton, 
  showing 
  primary 
  

   and 
  sccoudary 
  fibre, 
  n' 
  . 
  Skeleton 
  acerate 
  and 
  tricurvato 
  

   acerate 
  spicules, 
  x 
  370. 
  From 
  type 
  specimen 
  from 
  Port 
  

   Jackson. 
  

  

  0. 
  Pacliychalina 
  macrodactyla. 
  Skeleton-spicule, 
  x 
  190. 
  

   From 
  specimen 
  figured 
  Plate 
  XL, 
  fig. 
  B. 
  

  

  p. 
  ProtoscJimidtici 
  liispidula, 
  portion 
  of 
  vertical 
  section, 
  x 
  

   68. 
  p 
  . 
  Skeleton-spicule, 
  x 
  100. 
  From 
  type 
  specimen 
  

   from 
  Albany 
  Island. 
  \_Note. 
  — 
  Some 
  loose 
  spicules 
  in 
  the 
  

   interspaces 
  of 
  the 
  skeleton 
  have 
  been 
  omitted 
  for 
  the 
  sake 
  

   of 
  clearness.] 
  

  

  q. 
  Bliizochalina 
  spntlmlifera. 
  Skeleton- 
  spicules, 
  X 
  68. 
  From 
  

   type 
  specimen 
  from 
  Thursday 
  Island. 
  

  

  •r. 
  B. 
  canalis. 
  Skeleton-spicule, 
  x 
  68. 
  From 
  type 
  specimen 
  

   from 
  Port 
  Darwin. 
  

  

  s. 
  R. 
  siyigaporensis, 
  var. 
  Spicules, 
  x 
  190. 
  From 
  specimen 
  

   from 
  West 
  Island, 
  Torres 
  Straits. 
  

  

  t. 
  Schmkltia 
  variabilis. 
  Spicules, 
  x 
  68. 
  From 
  type 
  specimen 
  

   from 
  Port 
  Darwin. 
  [The 
  median 
  curve 
  of 
  the 
  diagonally- 
  

   placed 
  spicule 
  is 
  represented 
  as 
  too 
  sudden, 
  and 
  the 
  two 
  

   lateral 
  curves 
  introduced 
  do 
  not 
  exist.] 
  

  

  u. 
  JReniera 
  testudinaria, 
  part 
  of 
  vertical 
  section, 
  x 
  38. 
  u. 
  

   Spicules, 
  X 
  68. 
  From 
  dry 
  specimen 
  from 
  Port 
  Denison. 
  

  

  v'. 
  Fellina 
  mnricata. 
  Skeleton-spicule, 
  with 
  ends 
  of 
  two 
  

   others, 
  exhibiting 
  the 
  wide 
  range 
  of 
  variation, 
  x 
  190. 
  

   From 
  type 
  specimen 
  from 
  Port 
  Darwin. 
  

  

  w. 
  P. 
  aliformis. 
  Skeleton-spicule, 
  x 
  68. 
  From 
  type 
  specimen 
  

   from 
  Port 
  Darwin. 
  

  

  X. 
  P. 
  eusij^>lionia. 
  Skeleton-spicules, 
  x 
  68, 
  From 
  type 
  speci- 
  

   men 
  from 
  Port 
  Darwin. 
  

  

  y. 
  Amphilectus 
  hispidulus, 
  vertical 
  section, 
  x 
  68. 
  y'. 
  Skeleton 
  

   acuate 
  spicule, 
  x 
  190. 
  y". 
  Anchorate 
  spicule 
  from 
  front 
  

   and 
  side, 
  x 
  370. 
  From 
  type 
  (dry) 
  specimen 
  from 
  Thurs- 
  

   day 
  Island. 
  

  

  2z 
  

  

  