﻿334 
  me. 
  a. 
  c. 
  sewaed 
  on 
  the 
  association 
  of 
  [aug. 
  1 
  897, 
  

  

  Conclusions. 
  

  

  It 
  remains 
  for 
  us 
  to 
  consider 
  the 
  probable 
  geological 
  horizon 
  

   indicated 
  by 
  this 
  assemblage 
  of 
  plants. 
  

  

  In 
  discussing 
  this 
  question 
  in 
  the 
  case 
  of 
  the 
  Francis 
  beds, 
  

   Zeiller 
  * 
  decides 
  in 
  favour 
  of 
  assigning 
  the 
  plant-beds 
  to 
  the 
  horizon 
  

   of 
  the 
  Beaufort 
  stage, 
  which 
  he 
  speaks 
  of 
  as 
  Permo-Triassic, 
  and 
  

   correlates 
  them 
  with 
  the 
  Damuda 
  Beds 
  of 
  India. 
  The 
  absence 
  of 
  the 
  

   genus 
  Gangamopteris 
  is 
  quoted 
  by 
  Zeiller 
  as 
  indicating 
  the 
  upper 
  

   rather 
  than 
  the 
  lower 
  division 
  (Barakar) 
  of 
  the 
  Damuda 
  stage. 
  This 
  

   genus 
  has, 
  I 
  believe, 
  now 
  been 
  recognized 
  at 
  Francis 
  (fig. 
  1 
  c, 
  p. 
  324), 
  

   and 
  this 
  makes 
  it 
  possible 
  to 
  correlate 
  the 
  Francis 
  plant-beds 
  with 
  

   the 
  Lower 
  or 
  Middle 
  Damudas, 
  The 
  plants 
  from 
  Francis 
  are 
  on 
  the 
  

   whole 
  indicative 
  of 
  a 
  Permo-Carboniferous 
  age. 
  The 
  agreement 
  of 
  

   the 
  plants 
  is 
  closer 
  with 
  the 
  Damuda 
  flora 
  than 
  with 
  that 
  of 
  the 
  

   underlying 
  Karharbari 
  stage 
  or 
  the 
  overlying 
  Panchet 
  Beds. 
  

  

  The 
  plants 
  from 
  Bcsehmans 
  Fontein 
  and 
  Maggies 
  Mine 
  are 
  not 
  

   sufficiently 
  numerous 
  to 
  afford 
  very 
  conclusive 
  evidence, 
  but 
  they 
  do 
  

   not 
  offer 
  any 
  obstacle 
  to 
  the 
  correlation 
  of 
  these 
  rocks 
  with 
  those 
  

   of 
  Casey's 
  Township 
  (Francis), 
  which 
  Draper 
  considers 
  to 
  be 
  of 
  the 
  

   same 
  geological 
  age. 
  

  

  We 
  turn 
  next 
  to 
  the 
  sandstones 
  and 
  leaf-beds 
  of 
  Vereeniging, 
  

   which 
  present 
  the 
  most 
  interesting 
  problem 
  on 
  account 
  of 
  the 
  occur- 
  

   rence 
  of 
  Sigillaria. 
  2 
  The 
  occurrence 
  of 
  Gangamopteris 
  points 
  to 
  the 
  

   Damuda 
  or 
  Xarharbari 
  stage 
  of 
  India 
  as 
  the 
  probable 
  representative 
  

   of 
  the 
  Yereeniging 
  beds. 
  The 
  abundance 
  of 
  the 
  long 
  and 
  narrow 
  

   Glossopteris-leaves, 
  which 
  I 
  have 
  spoken 
  of 
  as 
  G. 
  Broivniana 
  var. 
  

   anqustifolia 
  , 
  would 
  seem 
  to 
  point 
  rather 
  to 
  the 
  Damuda 
  than 
  to 
  the 
  

   Karharbari 
  horizon 
  ; 
  but 
  this 
  is 
  by 
  no 
  means 
  conclusive 
  evidence. 
  

   Draper 
  considers 
  these 
  beds 
  to 
  belong 
  to 
  the 
  same 
  horizon 
  as 
  those 
  

   of 
  the 
  other 
  two 
  localities. 
  We 
  must 
  next 
  consider 
  the 
  relation 
  

   of 
  the 
  Yereeniging 
  rocks 
  to 
  those 
  of 
  other 
  countries 
  in 
  which 
  

   Sigillaria 
  Brardi 
  occurs. 
  

  

  In 
  Europe 
  Sigillaria 
  Brardi 
  usually 
  characterizes 
  an 
  Upper 
  Coal- 
  

   Measure 
  or 
  Permian 
  horizon. 
  Kidston 
  has 
  recorded 
  this 
  species 
  

   from 
  the 
  Middle 
  as 
  well 
  as 
  from 
  the 
  Upper 
  Coal 
  Measures 
  of 
  

   Staffordshire, 
  3 
  but 
  as 
  a 
  general 
  rule 
  it 
  is 
  a 
  distinctly 
  Upper 
  Coal- 
  

   Measure 
  and 
  Permian 
  form. 
  Sigillaria 
  Brardi 
  has 
  been 
  recorded 
  

   from 
  the 
  following, 
  among 
  other, 
  European 
  localities: 
  — 
  The 
  Upper, 
  

   Middle, 
  and 
  Lower 
  Coal 
  Measures 
  of 
  England; 
  the 
  Commentry 
  4 
  

   Coalfield 
  of 
  France, 
  referred 
  to 
  an 
  Upper 
  Coal-Measure 
  age, 
  

   and 
  as 
  characteristic 
  of 
  the 
  upper 
  beds 
  of 
  the 
  Gard 
  5 
  Coalfield. 
  

  

  1 
  Bull. 
  Soc. 
  geol. 
  France, 
  ser. 
  3, 
  vol. 
  xxiv. 
  (1896). 
  

  

  2 
  Molengraaff 
  speaks 
  of 
  a 
  specimen 
  of 
  Sigillaria 
  from 
  some 
  coal-beds 
  in 
  the 
  

   Transvaal, 
  but 
  does 
  not 
  describe 
  it 
  : 
  see 
  Neues 
  Jahrb., 
  Beilage, 
  vol. 
  ix. 
  (1894-95) 
  

  

  P 
  ' 
  3 
  17 
  proc. 
  Eoy. 
  Phys. 
  Soc. 
  Edin. 
  vol. 
  xii. 
  (1894) 
  p. 
  252, 
  & 
  Trans. 
  Boy. 
  Soc. 
  

   Edin 
  vol 
  xxxvi. 
  pt. 
  i. 
  (1891) 
  p. 
  84. 
  See 
  also 
  Zeiller, 
  Bull. 
  Soc. 
  geol. 
  France, 
  

   ser. 
  3, 
  vol', 
  xxii. 
  (1895) 
  p. 
  496. 
  

  

  * 
  'Etudes 
  sur 
  le 
  Terrain 
  houiller 
  de 
  Commentry, 
  Flor. 
  Foss. 
  Eenault 
  & 
  

   Zeiller, 
  p. 
  539 
  (1890). 
  

  

  5 
  Grand' 
  Eury 
  ' 
  G&>1. 
  & 
  Pal. 
  Bass, 
  houill. 
  Gard,' 
  p. 
  250 
  (St. 
  Etienne, 
  1890) 
  

  

  