﻿LECKENBY 
  OOLITIC 
  PLANTS. 
  77 
  

  

  Thuytes 
  expansus, 
  Bindley, 
  b. 
  Sphenopteris 
  crenulata, 
  Brongniart. 
  

  

  Brachyphyllum 
  mammillare, 
  Lindl. 
  hymenophylloides, 
  Brongn. 
  

  

  b. 
  Zamites 
  gigas, 
  IAndley. 
  Neuropteris 
  lobifolia, 
  Phillips. 
  

  

  b. 
  lanceolatus, 
  IAndley. 
  ligata, 
  IAndley. 
  

  

  b. 
  Palseozamia 
  hastula, 
  Bean, 
  MS. 
  b. 
  PecopterisWhitbiensis, 
  Brongniart. 
  

  

  {Cycadites 
  pectinoides, 
  Phillips.) 
  b. 
  Haiburnensis, 
  Bindley. 
  

  

  Pterophyllum 
  minus, 
  Bindley. 
  dentata, 
  Bindley. 
  

  

  b. 
  Otopteris 
  obtusa, 
  Bindley. 
  b. 
  polydactyla, 
  Goeppert. 
  

  

  b. 
  acuminata, 
  Bindley. 
  Acrostichites 
  Williamsonis, 
  Bindley 
  > 
  

  

  b. 
  lanceolata, 
  Bean, 
  MS. 
  sp. 
  

  

  b. 
  graphica, 
  Bean, 
  MS. 
  b. 
  Sphsereda 
  parvula, 
  Bean, 
  MS. 
  

  

  b. 
  tenuata, 
  Bean, 
  MS. 
  b. 
  Lycopodites 
  falcatus, 
  Bindley. 
  

  

  b. 
  Equisetites 
  columnaris, 
  Brongniart. 
  b. 
  Cryptomerites 
  ? 
  divaricatus, 
  Bunb. 
  

  

  lateralis, 
  Phillips. 
  

  

  II. 
  Notes, 
  and 
  Descriptions 
  of 
  New 
  Species. 
  

  

  1. 
  Cycadites 
  zamioides, 
  nobis. 
  PI. 
  VIII. 
  fig. 
  1. 
  

  

  Cycadites 
  gramineus, 
  Bean, 
  MS., 
  non 
  Phillips. 
  

  

  Frond 
  broad, 
  abruptly 
  contracted 
  near 
  the 
  apex; 
  pinnoz 
  slender, 
  of 
  

   nearly 
  equal 
  thickness, 
  contracted 
  upon 
  the 
  midrib 
  at 
  the 
  junction 
  

   with 
  the 
  rachis. 
  

  

  This 
  species 
  is 
  considered 
  hy 
  Mr. 
  Bean 
  to 
  be 
  a 
  true 
  Cycad, 
  and 
  

   has 
  been 
  named 
  by 
  him, 
  in 
  MS., 
  Cycadites 
  gramineus. 
  The 
  strong 
  

   central 
  midrib 
  of 
  the 
  leaflet 
  favours 
  Mr. 
  Bean's 
  opinion 
  ; 
  but 
  more 
  

   perfect 
  specimens 
  show 
  that 
  it 
  is 
  not 
  attached, 
  as 
  he 
  once 
  thought, 
  

   by 
  its 
  entire 
  base. 
  It 
  seems 
  to 
  be 
  intermediate 
  between 
  Zamia 
  and 
  

   Cycadites. 
  I 
  have 
  therefore 
  named 
  it 
  Cycadites 
  zamioides. 
  

  

  2. 
  Pal^ozamia 
  pecten, 
  Lindley, 
  sp. 
  PI. 
  IX. 
  fig. 
  4. 
  

  

  To 
  illustrate 
  the 
  affinities 
  of 
  this 
  species 
  with 
  Zamia, 
  I 
  have 
  figured 
  

   a 
  specimen 
  showing 
  the 
  fronds, 
  stems, 
  and 
  a 
  flower 
  on 
  the 
  same 
  slab 
  

   of 
  shale. 
  

  

  3. 
  Pterophyllum 
  comptum, 
  Lindley. 
  PI. 
  IX. 
  fig. 
  3. 
  

  

  The 
  species 
  here 
  figured 
  is 
  a 
  young 
  plant, 
  perfect 
  at 
  the 
  point 
  of 
  

   attachment 
  to 
  the 
  root. 
  

  

  4. 
  Pterophyllum 
  medianum, 
  Bean, 
  MS. 
  PI. 
  VIII. 
  fig 
  2. 
  

  

  Frond 
  gradually 
  contracted 
  towards 
  the 
  base, 
  abruptly 
  so 
  at 
  the 
  apex; 
  

   pinnaz 
  long, 
  oblique, 
  irregularly 
  attenuate, 
  breadth 
  nearly 
  uniform, 
  

   length 
  from 
  four 
  to 
  six 
  times 
  their 
  breadth 
  ; 
  apices 
  rounded 
  infe- 
  

   riorly, 
  acutely 
  pointed 
  superiorly. 
  

  

  This 
  species 
  approaches 
  P. 
  tenuicaulis 
  ; 
  but 
  the 
  leaflets 
  are 
  always 
  

   more 
  slender 
  and 
  delicate, 
  and 
  more 
  elongated. 
  It 
  is 
  found 
  only 
  at 
  

   Gristhorpe, 
  where 
  it 
  is 
  not 
  common. 
  

  

  5. 
  Pterophyllum 
  angustifolium, 
  Bean, 
  MS. 
  PI. 
  VIII. 
  fig. 
  3. 
  

  

  Frond 
  equally 
  attenuated 
  above 
  and 
  below 
  ; 
  pinnae 
  very 
  long 
  and 
  

   tapering, 
  perpendicular 
  to 
  the 
  rachis, 
  irregidarly 
  alternate, 
  length 
  

   from 
  six 
  to 
  eight 
  times 
  their 
  breadth 
  ; 
  apices 
  acute. 
  

  

  