﻿NOTE 
  OK 
  THE 
  GENUS 
  PLUMALINA 
  

  

  By 
  JAMES 
  HALL 
  

  

  In 
  the 
  final 
  publications 
  of 
  the 
  Geological 
  Survey 
  of 
  New 
  

   York 
  (Reports 
  of 
  the 
  Third 
  and 
  Fourth 
  Districts), 
  Mr. 
  Van- 
  

   uxem, 
  on 
  page 
  175 
  of 
  his 
  report, 
  figured 
  a 
  fossil 
  consisting 
  of 
  a 
  

   simple 
  stipe 
  or 
  rachis, 
  with 
  narrow, 
  linear 
  pinnulse 
  arranged 
  in 
  

   rigid 
  order 
  upon 
  each 
  side 
  ; 
  and 
  on 
  page 
  2~ 
  3 
  of 
  the 
  Report 
  of 
  

   the 
  Fourth 
  District, 
  Mr. 
  Hall 
  gave 
  a 
  figure 
  of 
  a 
  similar 
  form, 
  

   as 
  a 
  group 
  or 
  tuft 
  of 
  simple 
  fronds, 
  with 
  the 
  pinnulse 
  in 
  a 
  

   good 
  state 
  of 
  preservation. 
  Both 
  authors 
  expressed 
  the 
  

   opinion 
  that 
  the 
  fossil 
  was 
  not 
  a 
  plant 
  ; 
  though 
  a 
  comparison 
  

   was 
  made 
  with 
  Filicites, 
  and 
  it 
  was 
  referred 
  to 
  Filicttes 
  % 
  in 
  

   an 
  explanation 
  of 
  figures 
  in 
  the 
  Tables 
  of 
  Fossils, 
  4th 
  District. 
  

  

  At 
  a 
  subsequent 
  period, 
  1855, 
  Dr. 
  B. 
  F. 
  Shumard 
  described 
  

   and 
  figured, 
  as 
  Filicites 
  gracilis, 
  a 
  species 
  congeneric 
  with 
  

   that 
  of 
  the 
  New 
  York 
  Reports.* 
  

  

  In 
  1858, 
  the 
  writer, 
  in 
  a 
  review 
  of 
  certain 
  genera 
  of 
  the 
  Grap- 
  

   tolitidse, 
  proposed 
  for 
  the 
  fossils 
  here 
  referred 
  to, 
  the 
  generic 
  

   nanfe 
  Plumalina, 
  and 
  Plumalina 
  plumaria 
  for 
  the 
  New 
  York 
  

   species, 
  regarding 
  it 
  as 
  the 
  type 
  of 
  the 
  genus, 
  f 
  and 
  recognizing 
  

   the 
  species 
  of 
  Dr. 
  Shumard 
  as 
  P. 
  gracilis. 
  The 
  New 
  York 
  

   fossil 
  has 
  subsequently 
  been 
  described 
  by 
  Dr. 
  Dawson 
  as 
  

   Lycopodites 
  Vanuxemi. 
  \ 
  

  

  Since 
  that 
  period 
  other 
  forms 
  have 
  come 
  under 
  the 
  observa- 
  

   tion 
  of 
  the 
  writer, 
  to 
  whom, 
  at 
  the 
  present 
  time, 
  at 
  least 
  six 
  

   species 
  are 
  known. 
  These 
  will 
  be 
  illustrated 
  in 
  a 
  future 
  report. 
  

  

  In 
  all 
  the 
  species 
  observed, 
  the 
  usual 
  form 
  is 
  that 
  of 
  a 
  simple 
  

   frond, 
  or 
  hydrocaulus, 
  with 
  narrow, 
  linear 
  pinnulpe 
  diverging 
  

   from 
  each 
  side, 
  essentially 
  in 
  the 
  same 
  plane, 
  and 
  more 
  or 
  

   less 
  ascending. 
  Rare 
  examples 
  are 
  bifurcating 
  or 
  otherwise 
  

   branching, 
  and 
  the 
  specimen 
  shown 
  on 
  plate 
  4, 
  fig. 
  1, 
  is 
  the 
  

   most 
  remarkable 
  example 
  of 
  this 
  kind 
  observed. 
  Although 
  

  

  * 
  Report 
  on 
  the 
  Geological 
  Survey 
  of 
  Missouri 
  : 
  Part 
  II, 
  p. 
  208, 
  pi. 
  A, 
  tig. 
  11. 
  1855. 
  

   f 
  Canadian 
  Naturalist 
  and 
  Geologist, 
  vol. 
  iii, 
  p. 
  175, 
  1858. 
  

   {Quarterly 
  Journ. 
  Geolog. 
  Soc., 
  vol. 
  xviii, 
  p. 
  814. 
  1862. 
  

  

  