﻿76 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  In 
  the 
  following 
  list 
  of 
  Plants 
  from 
  the 
  beds 
  at 
  Gristhorpe 
  and 
  

   Cloughton, 
  I 
  have 
  distinguished 
  as 
  follows 
  — 
  

  

  a. 
  Those 
  hitherto 
  found 
  only 
  at 
  Gristhorpe. 
  

  

  b. 
  Those 
  found 
  only 
  at 
  Cloughton. 
  

  

  c. 
  Those 
  common 
  to 
  both 
  localities. 
  

  

  b. 
  Thuytes 
  expansus, 
  Lindley. 
  a. 
  Hymenophyllites 
  denticulata, 
  

  

  c. 
  BrachyphyUummamruillare,ZittcW. 
  Brongniart. 
  

  

  a. 
  Fucoides 
  arcuatus, 
  Lindley. 
  a. 
  Williamsonis, 
  Brongniart. 
  

  

  c. 
  erectus, 
  Bean, 
  MS. 
  e. 
  Neuropteris 
  lobifolia, 
  Phillips. 
  

  

  a. 
  Cycadites. 
  a. 
  undulata, 
  Lindley. 
  

  

  c. 
  Palaeozamia 
  pecten, 
  Lindley, 
  sp. 
  c. 
  arguta, 
  Lindley. 
  

  

  c. 
  Pterophyllum 
  comptum, 
  Lindley. 
  c. 
  recentior, 
  Lindley, 
  

  

  c. 
  Nilssoni, 
  Lindley. 
  c. 
  ? 
  ligata, 
  Lindley. 
  

  

  a. 
  tenuicaulis, 
  Phillips. 
  c. 
  Pecopteris 
  insignis, 
  Lindley. 
  

  

  a. 
  angustifolium, 
  Bean, 
  MS. 
  c. 
  dentata, 
  Lindley. 
  

  

  a. 
  medianum, 
  Bean, 
  MS. 
  a. 
  exilis, 
  Phillips. 
  

  

  c. 
  Tseniopteris 
  major, 
  Lindley. 
  a. 
  acutifolia, 
  Lindley. 
  

  

  c. 
  vittata, 
  Lindley. 
  e. 
  ? 
  Murray 
  ana, 
  Brongniart. 
  

  

  a. 
  Ctenis 
  falcata, 
  Lindley. 
  c. 
  Acrostichites 
  Williamsonis, 
  Lind- 
  

  

  a. 
  Leckenbyi, 
  Bean, 
  MS. 
  ley, 
  sp. 
  

  

  a. 
  Glossopteris 
  Phillipsii, 
  Brongniart. 
  a. 
  Polypodites 
  polypodioides, 
  Lind- 
  

   c. 
  Cyclopteris 
  digitata, 
  Brongniart, 
  ley, 
  sp. 
  

  

  non 
  Lindley. 
  a. 
  undans, 
  Lindley, 
  sp. 
  

  

  c. 
  Otopteris 
  Beanii, 
  Lindley. 
  a. 
  Phlebopteris 
  propinqua, 
  Brongn. 
  

  

  a. 
  Sagenopteris 
  cuneata, 
  Lindley. 
  a. 
  contigua, 
  Lindley. 
  

  

  a. 
  Baiera 
  longifolia, 
  Phillips, 
  sp. 
  b. 
  Woodwardii, 
  LecTcenby. 
  

  

  b. 
  gracilis, 
  Banbury. 
  c. 
  Dictyophyllum 
  rugosum, 
  Lindley. 
  

  

  c. 
  Sphenopteris 
  arguta, 
  Lindley. 
  a. 
  Spha^reda 
  paradoxa, 
  Lindley. 
  

   b. 
  serrata, 
  Lindley. 
  c. 
  parvula, 
  Bean, 
  MS. 
  

  

  c. 
  modesta, 
  Bean, 
  MS. 
  c. 
  Solenites 
  Murrayana, 
  Lindley. 
  

  

  a. 
  nephrocarpa, 
  Bunbury. 
  c. 
  Lycopodites 
  Williamsonis, 
  Lindley. 
  

  

  Of 
  the 
  species 
  quoted 
  above, 
  all 
  the 
  moderately 
  plentiful 
  ones 
  occur 
  

   both 
  at 
  Gristhorpe 
  and 
  Cloughton. 
  It 
  is 
  only 
  in 
  the 
  case 
  of 
  such 
  

   as 
  are 
  of 
  really 
  rare 
  occurrence 
  that 
  I 
  can 
  quote 
  but 
  one 
  locality. 
  

   Further 
  researches 
  will 
  probably 
  increase 
  the 
  number 
  of 
  species 
  

   common 
  to 
  both. 
  

  

  The 
  Millepore-bed 
  referred 
  by 
  Prof. 
  Phillips 
  (at 
  page 
  51, 
  ' 
  Geology 
  

   of 
  Yorkshire 
  ') 
  to 
  the 
  Inferior 
  Oolite, 
  and 
  described 
  by 
  Dr. 
  Wright 
  

   (No. 
  26, 
  page 
  31) 
  in 
  the 
  memoir 
  already 
  referred 
  to, 
  is 
  the 
  lowest 
  

   marine 
  bed 
  of 
  the 
  series, 
  but 
  there 
  are 
  at 
  least 
  250 
  feet 
  of 
  sandstones 
  

   and 
  shales 
  between 
  it 
  and 
  the 
  true 
  Inferior 
  Oolite 
  or 
  Dogger. 
  It 
  

   derives 
  its 
  name 
  from 
  the 
  abundance 
  of 
  Cricopora 
  straminea 
  (Mille- 
  

   pora 
  straminea, 
  Phillips) 
  which 
  is 
  displayed 
  upon 
  its 
  weathered 
  

   lateral 
  surfaces. 
  It 
  is 
  the 
  hardest 
  rock 
  of 
  the 
  series, 
  and 
  its 
  superior 
  

   resistance 
  to 
  the 
  action 
  of 
  the 
  waves 
  is 
  shown 
  in 
  rugged 
  reefs 
  along 
  

   the 
  shore. 
  

  

  Below 
  this 
  bed 
  the 
  flora 
  is 
  characterized 
  by 
  the 
  greater 
  prepon- 
  

   derance 
  of 
  the 
  genera 
  Zamia 
  and 
  Otopteris 
  ; 
  as 
  we 
  ascend 
  these 
  

   genera 
  become, 
  on 
  the 
  contrary, 
  rarer, 
  their 
  place 
  being 
  occu- 
  

   pied 
  by 
  an 
  abundance 
  of 
  Pterophyllum. 
  In 
  the 
  following 
  list 
  of 
  

   species 
  below 
  the 
  Millepore-bed, 
  those 
  marked 
  b 
  have 
  not 
  hitherto 
  

   been 
  found 
  above 
  it. 
  

  

  