﻿SILURIAN 
  ROCKS 
  OP 
  SCANDINAVIA. 
  315 
  

  

  red 
  limestone 
  at 
  Skattungbyn 
  contains 
  a 
  band 
  of 
  red 
  shale 
  from 
  

   half 
  an 
  inch 
  to 
  one 
  inch 
  in 
  thickness, 
  very 
  rich 
  in 
  fossils, 
  which 
  are 
  

   of 
  considerable 
  interest, 
  and 
  will 
  be 
  referred 
  to 
  more 
  fully 
  when 
  

   considering 
  migrations. 
  I 
  found 
  here 
  : 
  — 
  

  

  Eemopleurides 
  radians 
  ? 
  

  

  Beyrichia, 
  sp. 
  

  

  Turrilepas. 
  

  

  Agnostus 
  trinodus, 
  var 
  

  

  iEglina 
  (eye 
  of). 
  

  

  Acidaspis. 
  

  

  Lichas. 
  

  

  Trinucleus. 
  

   Orthis. 
  

  

  Acrotreta. 
  

   Gasteropods. 
  

  

  All 
  these 
  fossils 
  are 
  very 
  minute, 
  and 
  seem 
  to 
  have 
  lived 
  under 
  

   conditions 
  unfavourable 
  for 
  the 
  existence 
  of 
  marine 
  life. 
  

  

  The 
  Orthoceras-limestone 
  at 
  Fjecka 
  is 
  succeeded 
  by 
  a 
  grey 
  

   limestone 
  with 
  shaly 
  partings 
  : 
  this 
  bed 
  is 
  considered 
  by 
  Tornqvist 
  

   to 
  be 
  a 
  passage-bed 
  between 
  the 
  Orthoceras-limestone 
  and 
  the 
  

   succeeding 
  Cystidean 
  limestone; 
  it 
  contains 
  an 
  admixture 
  of 
  the 
  

   faunas. 
  A 
  similar 
  bed 
  occurs 
  at 
  Furudal, 
  where 
  shaly 
  partings 
  

   contain 
  Diplograptus. 
  

  

  Cystidean 
  Limestone. 
  — 
  A 
  grey 
  nodular 
  limestone, 
  usually 
  crowded 
  

   with 
  Cystideans, 
  mostly 
  in 
  a 
  poor 
  state 
  of 
  preservation, 
  well 
  seen 
  

   at 
  Yickarbyn, 
  Kargarde, 
  Fjecka, 
  and 
  Furudal. 
  

  

  Between 
  the 
  Cystidean 
  limestone 
  and 
  the 
  Triirucleus-shales 
  are 
  two 
  

   series 
  of 
  beds 
  which 
  have 
  not 
  yet 
  received 
  distinctive 
  names, 
  but 
  

   have 
  been 
  described 
  by 
  Tornqvist 
  (Ofv. 
  af. 
  K. 
  Y.-Akad. 
  Forh. 
  1874, 
  

   No. 
  4, 
  p. 
  16). 
  The 
  lower 
  series 
  immediately 
  succeeds 
  the 
  Cystidean 
  

   limestone, 
  and 
  passes 
  into 
  it. 
  It 
  consists 
  of 
  greenish 
  grey 
  cal- 
  

   careous 
  shales, 
  with 
  calcareous 
  nodules. 
  This 
  series 
  is 
  found 
  at 
  

   Kargarde 
  and 
  at 
  Fjecka. 
  A 
  list 
  of 
  fossils 
  is 
  given 
  by 
  Tornqvist, 
  to 
  

   which 
  I 
  may 
  add 
  Turrilepas 
  and 
  Beyrichia 
  strangulata, 
  which 
  I 
  

   found 
  at 
  Kargarde. 
  The 
  succeeding 
  series 
  consists 
  of 
  hard 
  grey 
  

   limestones, 
  in 
  which 
  fossils 
  are 
  very 
  rare 
  : 
  it 
  is 
  seen 
  at 
  Fjecka, 
  

   apparently 
  underlying 
  the 
  old 
  grey 
  marls 
  (all 
  the 
  beds 
  at 
  this 
  place 
  

   being 
  reversed). 
  

  

  Trinucleus-Shales. 
  — 
  Black 
  shales, 
  crowded 
  with 
  fossils, 
  and 
  con- 
  

   taining 
  hard 
  nnfossiliferous 
  limestone 
  bands, 
  succeeded 
  by 
  red 
  cal- 
  

   careous 
  fossiliferous 
  shales. 
  These 
  beds 
  are 
  seen 
  in 
  many 
  sections, 
  

   as 
  at 
  Vickarbyn, 
  Skattungbyn, 
  Fjecka, 
  and 
  Gnllerasen. 
  In 
  the 
  

   paper 
  already 
  referred 
  to, 
  Tornqvist 
  gives 
  lists 
  of 
  the 
  higher 
  

   organisms; 
  and 
  in 
  another 
  paper 
  (Geol.-Foren. 
  i 
  Stockh. 
  Forh. 
  

   1879, 
  Fo. 
  56, 
  Bd. 
  iv. 
  No. 
  14, 
  p. 
  448) 
  he 
  records 
  Diplograptus 
  

   pristis, 
  His., 
  Dicellograptus 
  anceps, 
  Nich., 
  and 
  D. 
  elegans, 
  Carr., 
  

   from 
  these 
  beds. 
  

  

  Upper 
  Graptolite-Sliales. 
  These 
  have 
  since 
  been 
  divided 
  by 
  

   Tornqvist 
  (Geol. 
  Foren. 
  Forh. 
  1875, 
  No. 
  10) 
  into 
  the 
  lower 
  or 
  

   Lobiferus-shales, 
  and 
  the 
  upper 
  or 
  Ketiolites-shales. 
  

  

  The 
  junction 
  between 
  the 
  Lobiferus- 
  and 
  Trinucleus-shales 
  is 
  

   nowhere 
  seen 
  at 
  present. 
  At 
  the 
  north 
  end 
  of 
  the 
  village 
  of 
  Griil- 
  

   lerasen, 
  the 
  red 
  beds 
  of 
  the 
  Trinucleus-shales 
  are 
  seen 
  at 
  one 
  side 
  

   of 
  a 
  stream, 
  and 
  the 
  Lobiferus-shales 
  at 
  the 
  other 
  ; 
  and 
  there 
  is 
  no 
  

   evidence 
  of 
  a 
  fault 
  between 
  them. 
  The 
  lowest 
  beds 
  of 
  the 
  Lobi- 
  

  

  