﻿BIHANG 
  TILL 
  K. 
  SV. 
  VET.-AKAD. 
  HANDL. 
  BAND 
  6. 
  N:0 
  13, 
  11 
  

  

  flattened 
  specimens 
  tliere 
  is 
  no 
  trace 
  of 
  septa 
  between 
  the 
  

   thecae; 
  but 
  on 
  those, 
  which 
  are 
  preserved 
  in 
  relief, 
  they 
  

   appear 
  very 
  distinctly 
  (fig. 
  9 
  and 
  11). 
  The 
  hydrothecae 
  have 
  

   a 
  differeut 
  appearance 
  acoording 
  to 
  the 
  diflference 
  ofpressure; 
  

   now 
  resembling 
  those 
  of 
  a 
  Climacograptus, 
  now 
  those 
  of 
  Dipl. 
  

   quadriniucronatus 
  Hall. 
  

  

  From 
  the 
  dark, 
  spotted 
  Triniicleus-shales 
  in 
  Vestrogothia 
  

   there 
  are 
  in 
  the 
  State-Musenrn 
  specimens, 
  preserved 
  in 
  re- 
  

   lief; 
  flattened 
  in 
  multitudes 
  from 
  the 
  Dalecarlian 
  and 
  Ostro- 
  

   gothian 
  Trinucleus-shales. 
  The 
  same 
  species 
  was 
  found 
  by 
  

   Dr. 
  G. 
  LiNNAKSSON 
  in 
  a 
  gray 
  slate 
  in 
  Dd 
  5 
  near 
  Gross-Kuchle 
  

   in 
  Bohemia. 
  

  

  The 
  forms 
  denoted 
  in 
  foreign 
  literature 
  by 
  the 
  name. 
  

   of 
  i>. 
  pristis, 
  have 
  no 
  resemblance 
  to 
  Hising-er's 
  species, 
  which 
  

   seems 
  not 
  to 
  be 
  known 
  from 
  other 
  localities 
  than 
  those 
  above 
  

   mentioned. 
  The 
  only 
  species, 
  that 
  can 
  be 
  compared 
  with 
  Hi- 
  

   singer's 
  is 
  Graptoliihus 
  pristis 
  of 
  Hall: 
  — 
  • 
  Paleontology 
  of 
  

   New-York, 
  Vol. 
  I, 
  p. 
  256, 
  pl. 
  LXXH, 
  fig. 
  1 
  a— 
  3. 
  It 
  resem^bles 
  

   very 
  much 
  our 
  Swedish 
  species 
  ; 
  yet 
  it 
  diflfers 
  in 
  certain 
  re- 
  

   spects, 
  as 
  in 
  its 
  very 
  elongated 
  basal 
  appendix 
  and 
  the 
  shape 
  

   of 
  the 
  hydrothecse 
  as 
  given 
  on 
  some 
  of 
  Hall's 
  figures. 
  

  

  The 
  insufhcient 
  material 
  does 
  not 
  admit 
  any 
  examina- 
  

   tion 
  of 
  the 
  interiör 
  structure 
  of 
  this 
  species; 
  the 
  absence 
  of 
  

   a 
  septum, 
  dividing 
  the 
  hydrosoma 
  in 
  two 
  halves 
  seems 
  to 
  

   place 
  it 
  near 
  the 
  genus 
  Lasiograptus 
  ; 
  the 
  position 
  of 
  the 
  

   frequently 
  bent 
  and 
  twisted 
  virgula 
  is 
  in 
  accordance 
  with 
  

   that 
  of 
  this 
  genus. 
  

  

  The 
  type 
  specimens 
  of 
  Hisingee's 
  Prionotus 
  sagittarius, 
  

   Pr. 
  convolutus 
  and 
  Pr. 
  folium 
  are 
  all 
  present 
  upon 
  the 
  

   very 
  same 
  piece 
  of 
  rock, 
  which 
  cousists 
  of 
  a 
  somewhat 
  bitu- 
  

   minous 
  limestone 
  from 
  Furudal 
  in 
  Dalecarlia. 
  

  

  No. 
  o. 
  »Prionotus 
  sagittarius 
  linearis, 
  rectus, 
  plures 
  un- 
  

   cias 
  longus, 
  dimidiam 
  latus, 
  compressus, 
  rachide 
  marginali, 
  

   capillari, 
  altero 
  latere 
  dissepimentis 
  transversis, 
  distantibus, 
  

   margiue 
  serrato. 
  — 
  Icon. 
  Petrif. 
  suec, 
  Tab. 
  XXXV, 
  fig. 
  6. 
  — 
  

   Graptolitus 
  sagittarius, 
  Linn. 
  — 
  Loc. 
  Gum 
  Prionoto 
  scalari 
  oc- 
  

   curit 
  vulgatissime 
  nec 
  non 
  in 
  schisto 
  argillaceo 
  ad 
  Furudal. 
  

   Dalecarliae.» 
  

  

  On 
  examination 
  of 
  the 
  form, 
  which 
  is 
  the 
  type 
  of 
  the 
  

   drawing 
  in 
  Lethaea 
  Suecica, 
  it 
  proves 
  itself 
  to 
  be 
  exactly 
  

  

  