﻿278 
  

  

  G. 
  R. 
  Wieland 
  — 
  On 
  Liassic 
  Floras. 
  

  

  Noeggerathiopsis 
  appears 
  to 
  have 
  come 
  from 
  the 
  South 
  ; 
  so 
  

   also 
  any 
  G-lossopterids. 
  And 
  while 
  it 
  is 
  difficult 
  to 
  detect 
  

   other 
  southern 
  elements, 
  there 
  is 
  in 
  Oaxaca 
  the 
  curious 
  absence 
  

   of 
  conifers 
  of 
  northern 
  type 
  and 
  especially 
  of 
  Ginkgo, 
  so 
  far 
  a 
  

   very 
  distinctly 
  northern 
  form. 
  The 
  more 
  typically 
  Indian 
  

   net-veined 
  cycad 
  Dictyozamites 
  is 
  also 
  lacking, 
  though 
  spar- 
  

   ingly 
  found 
  on 
  both 
  the 
  Yorkshire 
  Coast 
  and 
  at 
  Bornholm, 
  

   and 
  now 
  known 
  to 
  have 
  occurred 
  in 
  the 
  Antarctic 
  realm, 
  as 
  

   very 
  recently 
  reported 
  by 
  Halle. 
  

  

  Table 
  VII. 
  — 
  Notable 
  Old 
  World 
  Types 
  not 
  yet 
  Found 
  Recurrent 
  in 
  Oaxaca. 
  

  

  India. 
  

  

  Yorkshire. 
  

  

  (1) 
  Liassic 
  : 
  Rajmahal 
  Hills 
  flora 
  : 
  

   Tceniopteris 
  lata 
  

   Macrotoeniopteris 
  lata 
  

   Cycadites 
  rajmahalensis 
  

   Pterophyllum 
  Morrissianum 
  

   Pterophyllum 
  princeps 
  

   Pterophyllum 
  rajmahalense 
  

   Pterophyllum 
  crassum 
  

   Pterophyllum 
  distans 
  

   Paleozamia 
  bengalensis 
  

   Dictyozamites 
  falcatus 
  

   Dictyozamites 
  indicus 
  

  

  ■ 
  Sphenopteris 
  Hislopi 
  

   Taxodites 
  {?) 
  indicus 
  

   Palissya 
  conferta 
  

   Ginkgo 
  crassipes 
  

   Thinnfeldia 
  indica 
  

  

  (2) 
  Oolite 
  : 
  Kach-Jabalpur 
  : 
  

   Ginkgo 
  lobata 
  

   Palissya 
  indica. 
  

   Palissya 
  jabalpurensis 
  

   Echinostrobus 
  expansa 
  

   Ctenis 
  Nathorstii 
  

  

  (1) 
  Lias 
  : 
  

  

  Cycadites 
  rectangularis. 
  

  

  [On 
  Bornholm 
  occurs 
  Dictyoza- 
  

   mites 
  Johnstrupi.~\ 
  

  

  (2) 
  Inferior 
  Oolite. 
  

   Ginkgo 
  digitata. 
  

   Baiera 
  gracilis. 
  

   Taxites 
  zamioides. 
  

   Dictyozamites 
  Hawelli. 
  

   Nilssonia 
  mediana. 
  

   Ctenis 
  falcata. 
  

  

  Ctenis 
  Nathorstii 
  (Bornholm). 
  

   Matonidium 
  Goeppertii. 
  

   Dictyophyllum 
  rugosum. 
  

  

  But 
  we 
  should 
  not 
  make 
  too 
  much 
  of 
  these 
  facts. 
  Far 
  more 
  

   noticeable 
  is 
  the 
  absence 
  of 
  the 
  large 
  forms 
  of 
  Pterophyllum 
  

   and 
  especially 
  of 
  Ctenis 
  / 
  for 
  the 
  recurrence 
  of 
  these 
  major 
  

   elements 
  of 
  the 
  Indian 
  Lias 
  in 
  the 
  supposedly 
  younger 
  Oro- 
  

   ville 
  flora 
  of 
  course 
  suggests 
  a 
  long 
  persistent 
  great 
  northern 
  

   route 
  or 
  rather 
  center 
  of 
  origin. 
  

  

  Taking 
  the 
  facts 
  at 
  hand, 
  it 
  appears 
  that 
  the 
  Oaxacan 
  plant 
  

   beds 
  were 
  not 
  notably 
  indebted 
  to 
  Indian 
  or 
  southern 
  regions. 
  

   At 
  least 
  this 
  is 
  a 
  fair 
  conclusion 
  from 
  the 
  suprajoined 
  Table 
  

   VII 
  giving 
  important 
  old 
  world 
  types 
  not 
  yet 
  known 
  to 
  recur 
  

  

  