﻿A 
  MONOGRAPH 
  OF 
  THE 
  VICTORIAN 
  SPONGES. 
  79 
  

  

  Figure 
  5. 
  — 
  Leticosolenia 
  tripodifcra.- 
  Small 
  portion 
  of 
  a 
  section 
  of 
  the 
  tube- 
  

   wall, 
  showing 
  the 
  arrangement 
  of 
  the 
  collared 
  cells 
  and 
  Sollas's 
  membrane, 
  with 
  the 
  

  

  rod-like 
  bodies. 
  

  

  c. 
  c. 
  Collared 
  cells. 
  

  

  r. 
  b. 
  Rod-like 
  bodies. 
  

  

  s. 
  m. 
  Sollas's 
  membrane. 
  

  

  Figure 
  6.- 
  — 
  Lcucosolenia 
  tripodifera. 
  Portion 
  of 
  a 
  section 
  similar 
  to 
  that 
  repre- 
  

   sented 
  in 
  Figure 
  5, 
  but 
  more 
  highly 
  magnified. 
  

   col. 
  Collar 
  of 
  collared 
  cell. 
  

   Other 
  lettering 
  as 
  in 
  Figure 
  5. 
  , 
  

  

  Figure 
  7. 
  — 
  Lcucosolenia 
  pellictilata. 
  Section 
  of 
  an 
  ovum 
  (Zeiss 
  F, 
  Oc. 
  2). 
  

   gr. 
  b. 
  Granular 
  body 
  of 
  the 
  ovum. 
  

   no. 
  Nucleolus. 
  

   mi. 
  Nucleus. 
  

  

  Figure 
  8. 
  — 
  Leucosolenia 
  deprcssa. 
  Section 
  of 
  an 
  ovum 
  (Zeiss 
  F, 
  Oc. 
  2). 
  The 
  

   outline 
  of 
  the 
  section 
  is 
  indicated 
  by 
  a 
  dotted 
  line, 
  the 
  granular 
  body 
  of 
  the 
  ovum 
  

   being 
  filled 
  in 
  only 
  at 
  one 
  place. 
  

  

  gr. 
  Granules 
  lying 
  just 
  within 
  the 
  nuclear 
  membrane. 
  

  

  n. 
  m. 
  Nuclear 
  membrane. 
  

  

  n. 
  n. 
  Nuclear 
  network. 
  

  

  Other 
  lettering 
  as 
  in 
  Figure 
  7. 
  

  

  PLATE 
  IX. 
  

  

  Spicules. 
  

   Figure 
  1.^ 
  — 
  Leucosolenia 
  lucasi. 
  

  

  a. 
  Triradiate. 
  

  

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

  

  seen 
  in 
  optical 
  section 
  at 
  its 
  base. 
  

   b.' 
  Quadriradiate; 
  side 
  view, 
  showing 
  the 
  apical 
  ray 
  {a. 
  r.) 
  in 
  

   full 
  length, 
  the 
  three 
  facial 
  rays 
  being 
  broken 
  off 
  short. 
  

  

  c. 
  Oxeotes. 
  

  

  Figure 
  2. 
  — 
  Leucosolenia 
  stolonifer. 
  

  

  b. 
  Quadriradiates; 
  I'acial 
  view, 
  the 
  apical 
  ray 
  represented 
  as 
  

  

  seen 
  in 
  optical 
  section 
  at 
  its 
  bas(\ 
  

   b.' 
  Quadriradiates; 
  side 
  view, 
  showing 
  normal 
  apical 
  ray 
  (n. 
  r.) 
  

  

  in 
  full 
  length. 
  

   b." 
  Quadriradiates; 
  side 
  view, 
  showing 
  innnensely 
  hyp(>rtroplii(>d 
  

  

  apical 
  ray 
  {a. 
  r.) 
  in 
  full 
  length. 
  

  

  c. 
  Oxeotes. 
  

  

  