﻿A 
  -MONOGRAPH 
  OF 
  THE 
  VICTORIAN 
  SPONGES. 
  81 
  

  

  Figure 
  3. 
  — 
  Leucosulenia 
  pulcliernnui. 
  

  

  a. 
  Oi'dmar.y 
  deep-lying 
  triradiates. 
  

   a.' 
  Stout, 
  curved 
  deriual 
  triradiates. 
  

  

  Figure 
  4. 
  — 
  Leiicosolema 
  ventricosa. 
  

  

  a. 
  Tiirudiates 
  of 
  \arious 
  sizes. 
  

  

  b. 
  Quadriradiates; 
  facial 
  view, 
  the 
  apical 
  ray 
  represented 
  as 
  

  

  seen 
  in 
  optical 
  section 
  at 
  its 
  liase. 
  

  

  c. 
  Oxeote. 
  

  

  Note. 
  —The 
  note 
  after 
  the 
  description 
  of 
  Plate 
  IX. 
  applies 
  equally 
  to 
  this 
  plate. 
  

  

  PLATE 
  XI. 
  

  

  Spicules. 
  

  

  Figure 
  1. 
  — 
  Leucosoleuia 
  proiogenes. 
  

  

  Triradiates 
  of 
  different 
  sizes. 
  

   Figure 
  2. 
  — 
  Lcucosolcnia 
  pruxiiiui. 
  

  

  Triradiates 
  of 
  different 
  sizes. 
  

   Figure 
  3. 
  — 
  Leucosoleuia 
  K>i/soni. 
  

  

  'J'riradiates 
  of 
  different 
  sizes. 
  

  

  Figure 
  4l.— 
  Leucosoleuia 
  depressa. 
  

   a. 
  Triradiates. 
  

  

  /;. 
  (^)uadriradiates 
  ; 
  facial 
  ^■ie^^", 
  the 
  apical 
  ray 
  represented 
  as 
  

   seen 
  in 
  optical 
  section 
  at 
  its 
  liase. 
  

  

  Figure 
  5. 
  — 
  Leucosoleuia 
  Inpaili/eni. 
  

  

  a. 
  Triradiah^s. 
  

  

  a.' 
  Dermal 
  triradiate 
  (tripod 
  spicule), 
  side 
  \ie\\ 
  . 
  

  

  h. 
  (^uadriradiates; 
  facial 
  \ieu. 
  the 
  apical 
  vny 
  repi'(>seiiled 
  a^- 
  

   seeii 
  in 
  optical 
  section 
  at 
  its 
  base. 
  

  

  I).' 
  (^)iiadi'iradia.te; 
  side 
  \ie\\, 
  slidwing 
  the 
  apical 
  v;\\ 
  {a. 
  r.) 
  at 
  

   full 
  length; 
  one 
  el 
  the 
  facial 
  I'ays 
  is 
  broken 
  off 
  and 
  one 
  

   rei)resented 
  as 
  seen 
  in 
  optical 
  set-tion 
  at 
  its 
  base. 
  

  

  b." 
  (^liiadnradiale: 
  facial 
  \ie\\, 
  showing 
  the 
  whole 
  of 
  the 
  much 
  

   eui'\ed 
  apical 
  ray 
  [a. 
  /'.). 
  

  

  iSoTE. 
  'i'he 
  note 
  after 
  the 
  dest-nption 
  of 
  i'latt' 
  IX. 
  applies 
  e(piall\ 
  to 
  this 
  plate. 
  

  

  