﻿EADIOLARIA 
  OE 
  THE 
  LONDON 
  CLAY. 
  

  

  123 
  

  

  In 
  the 
  absence 
  of 
  full 
  proof 
  that 
  a 
  second 
  joint 
  had 
  existed, 
  I 
  

   think 
  it 
  better 
  to 
  refer 
  the 
  specimens 
  to 
  Eucyrtidium, 
  and 
  I 
  record 
  

   the 
  species 
  under 
  the 
  name 
  of 
  Eucyrtidium 
  Hammondi. 
  

  

  Another 
  and 
  abundant 
  form, 
  Nos. 
  2 
  and 
  2 
  6, 
  has 
  the 
  appearance 
  of 
  

   a 
  discoidal 
  Diatom, 
  abraded 
  circumferentially, 
  witht 
  his 
  difference 
  — 
  

   the 
  cellulation 
  differs 
  from 
  that 
  of 
  any 
  Diatom 
  known 
  to 
  me, 
  and 
  

   there 
  are 
  no 
  indications 
  of 
  bivalvular 
  formation. 
  A 
  sectional 
  view 
  

   shows 
  that 
  the 
  same 
  structure 
  prevails 
  throughout. 
  Any 
  doubt 
  

   on 
  the 
  point 
  is 
  set 
  at 
  rest 
  by 
  Hackel, 
  who 
  distinctly 
  refers 
  it 
  to 
  the 
  

   Eadiolarian 
  genus 
  Spongodiscus. 
  I 
  have 
  named 
  it 
  Spongodiscus 
  

   asper. 
  

  

  Radiolaria 
  from 
  the 
  London 
  Clay 
  of 
  Sheppey. 
  

  

  10 
  

  

  

  

  26 
  

  

  

  ii 
  

  

  1, 
  8, 
  10. 
  Eucyrtidium 
  Hammondi, 
  sp. 
  n., 
  Xll2. 
  

  

  2, 
  2 
  b. 
  Spongodiscus 
  asper, 
  sp. 
  n., 
  X 
  112. 
  

   11. 
  Monosphcera 
  toliapica, 
  sp. 
  n., 
  xll2. 
  

  

  4. 
  Spherical 
  bodies, 
  probably 
  Eadiolarian, 
  Xll2. 
  

  

  5. 
  Fragmentary 
  rods, 
  probably 
  Eadiolarian, 
  Xll2. 
  

  

  No. 
  11 
  represents 
  a 
  globular 
  form 
  of 
  hexagonal 
  lattice-work, 
  the 
  

   interior 
  being 
  now 
  filled 
  with 
  pyrites 
  ; 
  I 
  refer 
  this 
  to 
  the 
  genus 
  

   Monosphcera, 
  under 
  the 
  name 
  of 
  M. 
  toliapica. 
  As 
  suggested 
  by 
  

   Hackel, 
  the 
  fragmentary 
  styles 
  or 
  rods, 
  Nos. 
  5 
  a 
  and 
  5 
  b, 
  probably 
  

   represent 
  some 
  complex 
  forms 
  that 
  have 
  failed 
  to 
  preserve 
  their 
  

  

  