﻿G. 
  B. 
  Wieland—On 
  Liassic 
  Floras. 
  279 
  

  

  in 
  Oaxaca.* 
  The 
  Indian 
  Liassic 
  and 
  Californian 
  plant 
  equiva- 
  

   lence 
  is 
  as 
  follows 
  : 
  

  

  Table 
  VIII. 
  — 
  Recurrence 
  of 
  Indian 
  Types 
  in 
  California. 
  

  

  Indian 
  Liassic. 
  

  

  California 
  [Oolite.] 
  

  

  Fteroph 
  yllum 
  rajmahalense, 
  Pterophyllum 
  rajmahalense. 
  

  

  Pterophyllum 
  Morrissianum, 
  [near] 
  Ctenophyllum 
  den 
  si 
  folium. 
  

  

  Pterophyllum 
  princeps, 
  ) 
  

  

  Pterophyllum 
  erassum, 
  I 
  [near] 
  Ctensis 
  grandifolia. 
  

  

  Pterophyllum 
  distans, 
  ) 
  

  

  Cjcadites 
  rajmahalensis, 
  [Recurs 
  in 
  North 
  Carolina 
  Trias.] 
  

  

  Icenioptens 
  lata, 
  i 
  [near] 
  Macrotceniopteris 
  calif 
  ornica. 
  

  

  Macrotcemopteris 
  lata, 
  ) 
  L 
  J 
  r 
  J 
  

  

  To 
  the 
  lists 
  of 
  Table 
  VII 
  could, 
  of 
  course, 
  be 
  added 
  the 
  

   plants 
  which 
  are 
  new 
  at 
  Bornholm. 
  But 
  it 
  is 
  a 
  trifle 
  more 
  

   convenient 
  to 
  give 
  these 
  separately 
  as 
  follows 
  : 
  

  

  (1) 
  Dicksonia 
  Plngelii 
  

  

  (2) 
  " 
  pauciloba 
  

  

  (3) 
  Asplenites 
  Cladophleboides 
  

  

  (4) 
  Hausmannia 
  acutidens 
  

  

  (5) 
  Ctenis 
  JSFathorstii 
  

  

  (6) 
  Otozamites 
  bornholmiensis 
  

  

  (7) 
  " 
  Bartholini 
  

  

  (8) 
  Otozam 
  ites 
  pusillus 
  

  

  (9) 
  " 
  tenuissimus 
  

  

  (10) 
  Dictyozamites 
  Johnstrupi 
  

  

  (11) 
  Pagiophyllum 
  falcatum 
  

  

  (12) 
  " 
  tricing 
  idare 
  

  

  (13) 
  Taxites 
  subzamioides 
  

  

  (14) 
  Carpolithes 
  nummularius 
  

  

  Bornholm 
  is 
  only 
  separated 
  from 
  the 
  Yorkshire 
  Coast 
  by 
  

   15° 
  of 
  longitude 
  on 
  the 
  approximate 
  55th 
  parallel 
  of 
  north 
  

   latitude 
  ; 
  and 
  its 
  Lower 
  Jurassic 
  plant 
  beds 
  must 
  be 
  a 
  near 
  

  

  * 
  A 
  most 
  interesting 
  habitus 
  feature 
  of 
  the 
  Mexican 
  Ptilophyllums 
  is 
  the 
  

   number 
  of 
  fronds 
  characterized 
  by 
  a 
  pinnule 
  insertion 
  intermediate 
  between 
  

   the 
  linear 
  or 
  Pterophyllum 
  and 
  the 
  stemmed 
  or 
  Podozamites 
  type. 
  And 
  this 
  

   gradual 
  transition 
  through 
  the 
  uni- 
  or 
  an 
  terolob 
  ate, 
  faintly 
  posterolobate 
  and 
  

   finally 
  distinctly 
  bilobate 
  insertion, 
  is 
  in 
  distinct 
  agreement 
  with 
  the 
  great 
  

   variety 
  of 
  stem 
  and 
  floral 
  structure. 
  As 
  these 
  pages 
  go 
  to 
  press, 
  a 
  study 
  

   of 
  the 
  porcellanous 
  specimens 
  from 
  the 
  Rajmahal 
  Lias 
  by 
  Miss 
  Bancroft 
  

   comes 
  to 
  hand, 
  and 
  the 
  details 
  brought 
  to 
  view 
  further 
  emphasize 
  how 
  com- 
  

   pletely 
  the 
  work 
  of 
  the 
  past 
  few 
  years 
  has 
  broken 
  down 
  the 
  barriers 
  between 
  

   the 
  Cycadeoidefe, 
  Williamsonians, 
  and 
  the 
  existing 
  cycads, 
  bringing 
  to 
  view 
  a 
  

   varied 
  and 
  vast 
  but 
  homogeneous 
  group. 
  In 
  particular 
  the 
  nodal 
  type 
  of 
  

   stem 
  brought 
  to 
  definite 
  notice 
  in 
  my 
  paper 
  on 
  the 
  Williamsonian 
  Tribe 
  

   proves 
  of 
  intermediate 
  type. 
  Growth 
  rings 
  are 
  not 
  found 
  strong, 
  perhaps 
  

   because 
  the 
  preservation 
  in 
  light 
  color 
  makes 
  their 
  observation 
  difficult 
  ; 
  but 
  

   even 
  this 
  difference 
  from 
  Dion 
  is 
  now 
  broken 
  down, 
  as 
  I 
  find 
  that 
  some 
  of 
  

   my 
  sections 
  of 
  Cycadeoideos 
  show 
  the 
  growth 
  rings 
  distinctly. 
  

  

  