﻿684 
  EXPLANATION 
  OP 
  THE 
  PLATES. 
  

  

  Fig. 
  h. 
  Clathria 
  mceandrma, 
  the 
  stout 
  aud 
  slender 
  smooth 
  acerato, 
  

   and 
  the 
  spined 
  aciiate 
  spicules, 
  x 
  19<J, 
  h', 
  the 
  tricurvate 
  

   acerate, 
  and 
  h", 
  the 
  equianchoratc 
  spicules 
  (the 
  latter 
  

   from 
  the 
  front 
  and 
  side), 
  x 
  370. 
  From 
  typo 
  specimen 
  

   from 
  Marie 
  Louise 
  Island. 
  

  

  i. 
  Reniera, 
  sp. 
  allied 
  to 
  H. 
  crateriformis, 
  average 
  form 
  of 
  

   skeleton- 
  spicule, 
  x 
  68. 
  From 
  specimen 
  from 
  Providence 
  

   Island. 
  

  

  j. 
  Bhizochalina 
  pellucida, 
  the 
  skeleton-spicule, 
  X 
  100. 
  From 
  

   type 
  specimen 
  from 
  Providence 
  Island. 
  

  

  h. 
  Leticop7d(Xus 
  proteun, 
  the 
  skeleton-spicule, 
  x 
  08. 
  From 
  

   specimen 
  from 
  Providence 
  Reef. 
  

  

  I. 
  EcJiinonema 
  graede, 
  the 
  skeleton- 
  and 
  echiuatiug 
  spicules, 
  

   X 
  190. 
  I', 
  the 
  tricurvate 
  acerate, 
  and 
  /", 
  equianchorate 
  

   spicules, 
  X 
  370. 
  From 
  type 
  specimen 
  from 
  Providence 
  

   Eeef. 
  

  

  m. 
  Besmacidon 
  rimosa, 
  the 
  skeleton-, 
  and 
  ?«', 
  tricurvate 
  

   acerate 
  spicules, 
  x 
  190 
  ; 
  m", 
  the 
  ecjuianchorate, 
  from 
  the 
  

   front 
  and 
  side, 
  x 
  370. 
  From 
  type 
  specimen 
  from 
  Mozam- 
  

   bique. 
  

  

  n. 
  Reniera 
  camerata, 
  the 
  skeleton-spicule, 
  x 
  190. 
  From 
  type 
  

   specimen 
  from 
  Marie 
  Louise 
  Island, 
  Amirantes. 
  

  

  o. 
  R. 
  cribriformis, 
  the 
  skeleton-spicule, 
  x 
  190. 
  From 
  type 
  

   specimen 
  from 
  Seychelle 
  Islands. 
  

  

  j). 
  Spirastrella 
  punctulata, 
  the 
  skeleton-spicule, 
  x 
  190. 
  p' 
  , 
  

   the 
  spinispirular 
  flesh-spicules, 
  X 
  370. 
  From 
  type 
  speci- 
  

   men 
  from 
  Mozambique. 
  

  

  (j. 
  S. 
  transitoria, 
  the 
  skeleton-spicule, 
  x 
  190. 
  (/', 
  the 
  spini- 
  

   spirular 
  flesh-spicules 
  and 
  curiously 
  attenuated 
  variety 
  of 
  

   apex, 
  X 
  370. 
  From 
  type 
  specimen 
  from 
  Darros 
  Island. 
  

  

  Printed 
  liy 
  Tavlou 
  and 
  FkAncis, 
  Red 
  Lion 
  Court, 
  Fleet 
  Street. 
  

  

  