﻿320 
  MR. 
  A. 
  C. 
  SEWARD 
  ON 
  THE 
  ASSOCIATION 
  OF 
  [Aug. 
  1 
  89 
  7, 
  

  

  (or 
  at 
  least 
  very 
  convex) 
  subcarinate 
  scales, 
  having 
  a 
  divaricating 
  

   reticulated 
  nervation, 
  resembling 
  that 
  of 
  the 
  perfect 
  frond, 
  but 
  

   much 
  less 
  strongly 
  marked 
  ; 
  these 
  scales 
  are 
  of 
  large 
  size, 
  some 
  of 
  

   them 
  being 
  nearly 
  an 
  inch 
  in 
  length, 
  and 
  terminating 
  at 
  the 
  apex 
  

   in 
  a 
  long, 
  flat, 
  linear 
  appendage, 
  about 
  one 
  line 
  in 
  width, 
  which 
  

   occasionally 
  gives 
  off 
  small, 
  lateral, 
  flat 
  membranous 
  branches 
  

   nearly 
  at 
  right 
  angles 
  . 
  . 
  . 
  ' 
  He 
  compares 
  the 
  scales 
  with 
  some 
  

   ramenta 
  figured 
  by 
  Fee 
  in 
  Acrostichum 
  and 
  other 
  genera. 
  1 
  

  

  Description 
  op 
  the 
  Specimens. 
  

   (PL 
  XXI, 
  fig. 
  1.) 
  

  

  Portion 
  of 
  a 
  frond 
  5 
  cm. 
  long, 
  showing 
  distinct 
  anastomosing 
  and 
  

   crowded 
  veins, 
  with 
  several 
  elongated 
  and 
  irregular 
  elliptical 
  or 
  

   circular 
  holes 
  in 
  the 
  lamina. 
  Probably 
  these 
  sorus-like 
  patches 
  

   are 
  the 
  result 
  of 
  tearing 
  ; 
  the 
  specimen 
  illustrates 
  the 
  danger 
  of 
  

   attaching 
  any 
  great 
  importance 
  to 
  characters 
  of 
  this 
  kind. 
  In 
  

   venation 
  and 
  leaf-form 
  the 
  fragment 
  agrees 
  with 
  the 
  Australian 
  

   examples 
  of 
  G. 
  Browniana 
  seen 
  on 
  the 
  piece 
  of 
  shale 
  represented 
  

   in 
  PI. 
  XXIII, 
  fig. 
  1, 
  and 
  with 
  G. 
  Browniana 
  figured 
  by 
  Zeiller 
  from. 
  

   Francis 
  (op. 
  jam 
  cit. 
  pi. 
  xvi. 
  figs. 
  3 
  & 
  4), 
  and 
  I 
  believe 
  also 
  with 
  

   the 
  specimen 
  named 
  by 
  this 
  author 
  G. 
  angustifolia, 
  in 
  which 
  there 
  

   occur 
  what 
  are 
  very 
  probably 
  the 
  impressions 
  of 
  sori. 
  Compare 
  

   also 
  the 
  leaf 
  figured 
  by 
  Feistmantel 
  as 
  G. 
  communis 
  \ox.stenoneura? 
  

  

  Locality. 
  Boschmans 
  Fontein, 
  Middelburg. 
  

  

  PI. 
  XXI, 
  fig. 
  2. 
  (G. 
  Browniana 
  var. 
  indica.) 
  

  

  A 
  small 
  piece 
  of 
  a 
  large 
  frond; 
  from 
  the 
  midrib 
  to 
  the 
  leaf 
  

   margin 
  2-8 
  cm. 
  in 
  breadth. 
  This 
  fragment 
  is 
  of 
  interest 
  as 
  

   illustrating 
  the 
  difficulty 
  of 
  drawing 
  any 
  sharp 
  line 
  between 
  

   G. 
  Browniana 
  and 
  G. 
  indica. 
  It 
  is 
  considerably 
  larger 
  than 
  the 
  

   leaf 
  shown 
  in 
  fig. 
  1, 
  but 
  the 
  venation 
  is 
  of 
  the 
  same 
  type. 
  Zeiller's 
  

   figs. 
  1 
  and 
  2, 
  pi. 
  xvii., 
  of 
  G. 
  indica 
  agree 
  exactly 
  with 
  the 
  fragment 
  

   represented 
  in 
  our 
  fig. 
  2. 
  It 
  is 
  also 
  identical, 
  as 
  regards 
  both 
  size 
  and 
  

   venation, 
  with 
  some 
  of 
  the 
  large 
  fronds 
  described 
  by 
  Bunbury 
  from 
  

   Nagpur 
  as 
  G. 
  Browniana 
  var. 
  indica, 
  G. 
  stricta, 
  Bunb., 
  and 
  other 
  

   species. 
  It 
  is 
  impossible 
  to 
  recognize 
  a 
  distinct 
  difference 
  between 
  

   the 
  numerous 
  well-preserved 
  fronds 
  on 
  the 
  two 
  large 
  slabs 
  of 
  rock 
  

   (in 
  the 
  Botanical 
  Museum, 
  Cambridge) 
  from 
  which 
  Bunbury 
  described 
  

   his 
  species 
  G. 
  stricta. 
  One 
  is 
  able 
  to 
  trace 
  a 
  gradation, 
  from 
  the 
  

   large 
  fronds 
  referred 
  to 
  G. 
  Browniana 
  var. 
  indica 
  with 
  the 
  lateral 
  

   veins 
  disposed 
  as 
  shown 
  in 
  PI. 
  XXI, 
  fig. 
  2, 
  to 
  the 
  fronds 
  which 
  

   Bunbury 
  referred 
  to 
  G. 
  stricta, 
  3 
  in 
  which 
  the 
  lateral 
  veins 
  are 
  

   almost 
  at 
  right 
  angles 
  to 
  the 
  midrib. 
  Some 
  of 
  the 
  leaves 
  figured 
  by 
  

  

  1 
  See 
  Fee, 
  ' 
  Genera 
  Filicum 
  ' 
  (Polypodiacese), 
  1850-52. 
  

  

  2 
  'Flora 
  of 
  the 
  Damuda 
  & 
  Panchet 
  Divisions,' 
  Foss. 
  Flor. 
  G-ondw. 
  System, 
  

   Mem. 
  Geol. 
  Surv. 
  Ind. 
  (Pal. 
  Ind.) 
  vol. 
  iii. 
  (1881) 
  p. 
  99 
  & 
  pi. 
  xxxii. 
  a, 
  fig. 
  3, 
  etc. 
  

  

  8 
  Quart, 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xvii. 
  (1861) 
  pi. 
  ix. 
  fig. 
  5. 
  

  

  