﻿288 
  PK0CEEDI.NGS 
  OP 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  As 
  the 
  fossils 
  are 
  both 
  numerous 
  and 
  attractive 
  as 
  to 
  size, 
  colour 
  

   of 
  stone, 
  and 
  degree 
  of 
  preservation, 
  no 
  doubt 
  the 
  spot 
  will 
  be 
  well 
  

   visited, 
  and 
  we 
  shall 
  eventually 
  obtain 
  a 
  host 
  of 
  French 
  Silurian 
  

   species 
  from 
  a 
  mile 
  or 
  two 
  of 
  New 
  Red 
  Sandstone 
  cliff 
  in 
  Devon- 
  

   shire. 
  Meanwhile 
  it 
  will 
  be 
  advisable 
  to 
  give 
  a 
  general 
  list, 
  with 
  

   references 
  to 
  French 
  authors, 
  and 
  localities 
  of 
  the 
  species 
  collected, 
  

   and 
  then 
  describe 
  such 
  as 
  need 
  it. 
  

  

  PLANTS. 
  

  

  I 
  know 
  not 
  how 
  we 
  can 
  definitely 
  describe 
  these 
  rough 
  and 
  shape- 
  

   less 
  casts, 
  which 
  nevertheless 
  are, 
  I 
  believe, 
  rightly 
  referred 
  to 
  the 
  

   Algae; 
  M. 
  Pouault 
  finds 
  such 
  remains 
  abundant 
  in 
  the 
  rocks 
  of 
  

   Normandy, 
  and 
  he 
  has 
  carefully 
  described 
  and 
  distinguished 
  the 
  

   irregular 
  crisped 
  fronds 
  by 
  the 
  name 
  Dcedalus, 
  while 
  the 
  palmate 
  

   forms 
  with 
  a 
  stem 
  and 
  lateral 
  rib 
  he 
  calls 
  Vexillum. 
  Both 
  are 
  

   probably 
  Calciphytes, 
  and 
  probably 
  of 
  the 
  same 
  kind 
  as 
  the 
  well- 
  

   known 
  Cauda- 
  Galli 
  of 
  America 
  and 
  Scotland. 
  All 
  M. 
  Rouault's 
  

   species 
  appear 
  to 
  be 
  transversely 
  ridged 
  or 
  waved, 
  and 
  cannot 
  

   therefore 
  be 
  identical 
  with 
  ours, 
  which 
  unfortunately 
  we 
  have 
  no 
  

   means 
  of 
  figuring 
  in 
  the 
  present 
  memoir. 
  They 
  are 
  figured 
  in 
  the 
  

   First 
  Number 
  of 
  the 
  Geological 
  Magazine, 
  July 
  1864. 
  

  

  1. 
  Vexilltjm? 
  Geol. 
  Mag. 
  vol. 
  i. 
  p. 
  10. 
  fig. 
  2. 
  

  

  We 
  have 
  two 
  species, 
  neither 
  of 
  which 
  is 
  very 
  regular. 
  The 
  most 
  

   complete 
  is 
  an 
  undulated 
  palmate 
  plate, 
  thickened 
  on 
  one 
  margin 
  (?), 
  

   and 
  irregularly 
  undulated 
  in 
  the 
  longitudinal 
  direction. 
  Such 
  a 
  

   form 
  may 
  well 
  be 
  due 
  to 
  the 
  remains 
  of 
  some 
  expanded 
  Alga 
  ; 
  but 
  

   it 
  may 
  also 
  have 
  been 
  caused 
  by 
  the 
  movements 
  of 
  an 
  animal 
  in 
  the 
  

   arenaceous 
  matrix. 
  

  

  2. 
  Djedalus? 
  Geol. 
  Mag. 
  I 
  c, 
  p. 
  11. 
  fig. 
  3. 
  

  

  An 
  irregular 
  expanded 
  plate, 
  bent 
  three 
  -fourths 
  round 
  upon 
  itself 
  

   into 
  a 
  compressed 
  funnel-shaped 
  form, 
  and 
  which 
  must 
  have 
  been 
  

   3 
  or 
  4 
  inches 
  long, 
  at 
  least, 
  when 
  the 
  cone 
  was 
  perfect 
  ; 
  the 
  whole 
  

   surface 
  is 
  occupied 
  by 
  curved 
  ridges 
  nearly 
  parallel 
  to 
  one 
  another, 
  

   but 
  oblique 
  to 
  the 
  general 
  direction 
  of 
  the 
  plate. 
  The 
  actual 
  

   margin 
  of 
  the 
  plates, 
  against 
  which 
  these 
  ridges 
  abut, 
  is 
  not 
  clearly 
  

   seen. 
  No 
  trace 
  of 
  a 
  midrib. 
  

  

  ANNELIDA. 
  

  

  Common 
  as 
  are 
  the 
  tubes 
  of 
  Ann 
  elides 
  in 
  all 
  Palaeozoic 
  rocks, 
  it 
  is 
  

   only 
  now 
  and 
  then 
  that 
  they 
  present 
  sufficient 
  characters 
  to 
  enable 
  

   us 
  to 
  refer 
  them 
  to 
  definite 
  genera. 
  Of 
  these, 
  Traclujderma, 
  described 
  

   by 
  Prof. 
  Phillips, 
  is 
  distinguished 
  by 
  the 
  close 
  corrugation 
  of 
  its 
  

   corneous 
  tube, 
  which 
  I 
  have 
  seen 
  (in 
  a 
  Silurian 
  locality 
  in 
  the 
  West 
  

   of 
  Ireland) 
  holding 
  an 
  upright 
  position 
  in 
  the 
  bed. 
  I 
  think 
  we 
  may 
  

   refer 
  the 
  following, 
  without 
  much 
  doubt, 
  to 
  that 
  genus. 
  

  

  