﻿324 
  ME. 
  A. 
  C. 
  SEWARD 
  ON 
  THE 
  ASSOCIATION 
  OF 
  [Aug. 
  1 
  89 
  7 
  

  

  Fig. 
  1. 
  

  

  a. 
  Sphenopteris 
  sp. 
  

   S. 
  ? 
  Sigillaria 
  sp. 
  G. 
  

   sp. 
  Nat. 
  size. 
  

  

  X5. 
  c. 
  Gavgamopteris 
  cyclopteroides, 
  

  

  Glossopteris 
  Feistm. 
  Slightly 
  enlarged. 
  

  

  d. 
  Cardiocarpus 
  sp. 
  X 
  3. 
  

  

  Equisetaceous 
  Stems. 
  

  

  Phylloiheca 
  sp. 
  (PI. 
  XXIV. 
  fig. 
  1.) 
  

  

  This 
  photograph 
  shows 
  one 
  of 
  the 
  large 
  and 
  well-preserved 
  

   impressions 
  of 
  a 
  stern 
  from 
  Maggies 
  Mine. 
  It 
  is 
  16 
  cm. 
  long 
  and 
  

   nearly 
  4 
  cm. 
  broad, 
  the 
  internodes 
  having 
  a 
  length 
  of 
  about 
  4 
  cm. 
  

   The 
  surface 
  shows 
  narrow, 
  prominent 
  ridges, 
  separated 
  by 
  broad, 
  flat 
  

   depressions, 
  which 
  do 
  not 
  alternate 
  at 
  the 
  nodes, 
  but 
  are 
  continuous 
  

   from 
  one 
  internode 
  to 
  the 
  next, 
  as 
  in 
  Phyllotheca 
  and 
  Schizoneura. 
  

   Several 
  specimens 
  of 
  smaller 
  stems 
  identical 
  in 
  form 
  with 
  this 
  

   larger 
  example 
  have 
  been 
  found 
  at 
  the 
  same 
  locality. 
  In 
  the 
  

   absence 
  of 
  leaves 
  it 
  is 
  perhaps 
  unwise 
  to 
  refer 
  the 
  specimens 
  to 
  a 
  

   particular 
  species, 
  but 
  the 
  stems 
  agree 
  very 
  closely 
  with 
  those 
  

  

  