﻿LECKENBY 
  OOLITIC 
  PLANTS. 
  79 
  

  

  This 
  example, 
  and 
  the 
  specimen 
  of 
  which 
  a 
  portion 
  is 
  now 
  figured, 
  

   are 
  all 
  that 
  I 
  have 
  seen. 
  The 
  leaflets 
  are 
  shorter, 
  much 
  broader, 
  

   and 
  more 
  erect 
  than 
  in 
  0. 
  lanceolata 
  ; 
  they 
  also 
  spread 
  more 
  at 
  the 
  

   base, 
  and 
  curve 
  upwards. 
  

  

  11. 
  Otopteris 
  tenfata, 
  Bean, 
  MS. 
  PI. 
  IX. 
  fig. 
  1. 
  

  

  Frond 
  long 
  and 
  slender 
  ; 
  leaflets 
  nearly 
  circidar, 
  of 
  uniform 
  size, 
  ex- 
  

   cept 
  a 
  few 
  at 
  the 
  apex, 
  erect, 
  much 
  crowded, 
  and 
  imbricated, 
  with 
  

   three 
  or 
  four 
  stronger 
  veins 
  interspersed 
  amongst 
  the 
  ordinary 
  ones. 
  

   This 
  very 
  distinct 
  species 
  cannot 
  well 
  be 
  confounded 
  with 
  any 
  

   other. 
  The 
  small, 
  angularly 
  rounded, 
  and 
  almost 
  erect 
  leaflets 
  dimi- 
  

   nish 
  but 
  little 
  from 
  the 
  base 
  of 
  the 
  frond 
  until 
  the 
  apex 
  is 
  nearly 
  

   attained. 
  The 
  veins 
  are 
  not 
  uniform, 
  but 
  consist 
  of 
  three 
  or 
  four 
  

   principal 
  and 
  numerous 
  intermediate 
  ones. 
  It 
  occurs 
  in 
  a 
  hard 
  sandy 
  

   shale 
  200 
  feet 
  below 
  the 
  Millepore-bed. 
  

  

  12. 
  Tympanophora 
  simplex 
  et 
  racemosa, 
  Lindley. 
  PI. 
  XI. 
  fig. 
  2. 
  

  

  In 
  confirmation 
  of 
  the 
  opinion 
  that 
  Tympanophora 
  racemosa 
  is 
  

   Pecopteris 
  ? 
  Murrayana 
  in 
  fructification, 
  I 
  have 
  figured 
  a 
  specimen 
  

   showing 
  fertile 
  and 
  infertile 
  leaflets 
  on 
  the 
  same 
  frond. 
  Tympano- 
  

   phora 
  simplex 
  is, 
  I 
  suspect, 
  the 
  fertile 
  condition 
  of 
  Neuropteris 
  lobi- 
  

   folia, 
  but 
  on 
  this 
  subject 
  my 
  evidence 
  is 
  not 
  yet 
  quite 
  conclusive. 
  

   Sphenopteris 
  nephrocarpa, 
  Bunbury, 
  is 
  also, 
  I 
  think, 
  Sphenopteris 
  sti- 
  

   pata, 
  Phillips, 
  in 
  the 
  same 
  condition. 
  

  

  13. 
  Sphenopteris 
  modesta, 
  Bean, 
  MS. 
  PI. 
  X. 
  figs. 
  3 
  a, 
  3 
  b. 
  

  

  Frond 
  pinnate 
  ; 
  pinnae 
  elongated, 
  equal, 
  patent 
  ; 
  pinnules 
  obtuse, 
  very 
  

   oblique 
  to 
  the 
  rachis, 
  alternate, 
  attached 
  by 
  their 
  entire 
  base; 
  lobes 
  

   obtuse, 
  often 
  confluent, 
  obscurely 
  crenulated 
  at 
  the 
  apex 
  ; 
  nerves 
  bi- 
  

   or 
  tri-furcate, 
  widely 
  spreading. 
  

  

  This 
  very 
  distinct 
  species 
  is 
  remarkable 
  for 
  its 
  straight 
  elongated 
  

   pinna?, 
  the 
  pinnules 
  of 
  which 
  are 
  not 
  in 
  the 
  least 
  attenuated 
  for 
  

   three-fourths 
  of 
  the 
  entire 
  length 
  of 
  the 
  pinnae. 
  The 
  frond 
  appears 
  

   to 
  have 
  tapered 
  gradually 
  to 
  a 
  long, 
  slender, 
  and 
  delicate 
  apex. 
  It 
  

   is 
  very 
  abundant 
  in 
  a 
  seam 
  below 
  the 
  Millepore-bed, 
  and 
  occurs, 
  

   although 
  sparingly, 
  at 
  Gristhorpe. 
  

  

  14. 
  Sphenopteris 
  Jtjgleri, 
  Ettingshausen. 
  Abhandlungen 
  der 
  k. 
  k. 
  

   geologischen 
  Eeichsanstalt, 
  tab. 
  4. 
  fig. 
  5. 
  

  

  Notwithstanding 
  its 
  occurrence 
  in 
  a 
  stratum 
  so 
  much 
  older 
  than 
  

   the 
  " 
  Wealden 
  Periode 
  " 
  to 
  which 
  the 
  above 
  author 
  refers 
  this 
  species, 
  

   I 
  cannot 
  distinguish 
  any 
  Yorkshire 
  examples 
  from 
  the 
  specimen 
  

   figured 
  and 
  described 
  in 
  the 
  work 
  quoted. 
  It 
  and 
  Pecopteris 
  poly 
  - 
  

   clactyla 
  (mentioned 
  below) 
  appear 
  to 
  be 
  associated 
  in 
  Germany 
  with 
  

   Cyclopteris 
  digitata, 
  Brongn., 
  and 
  other 
  well-known 
  Yorkshire 
  Oolitic 
  

   species. 
  

  

  15. 
  Neuropteris 
  argtjta, 
  Lindley. 
  PI. 
  X. 
  fig. 
  4. 
  

  

  The 
  drawing 
  represents 
  this 
  Plant, 
  as 
  I 
  have 
  lately 
  found 
  it, 
  partly 
  

  

  