﻿BIHANG 
  TILL 
  K. 
  SV. 
  VET.-AKAU. 
  HANDL. 
  BAND. 
  6. 
  N:0 
  13. 
  7 
  

  

  Thus 
  Wahlenbekg 
  considered, 
  that 
  the 
  true 
  graptolites 
  

   only 
  deserved 
  tliis 
  name. 
  i\.ll 
  the 
  other 
  objets 
  of 
  inorganic 
  

   nature, 
  which, 
  especially 
  in 
  the 
  earlier 
  editions 
  of 
  Linnés 
  

   »Systema 
  Natnrae» 
  were 
  comprised 
  under 
  the 
  name 
  »Grapto- 
  

   lithus->\ 
  he 
  does 
  not 
  mention 
  at 
  all. 
  

  

  Wahlenbekg 
  in 
  referring 
  to 
  the 
  monoprionidian 
  graptolite, 
  

   which 
  is 
  found 
  in 
  the 
  upper 
  graptolite 
  shales 
  of 
  Westro- 
  

   gothia 
  together 
  witli 
  Orthoce^^atites 
  tenuis 
  (Climacogr. 
  sccdaris 
  

   L.) 
  as 
  Gr. 
  sagittarius 
  Linncei, 
  employs 
  this 
  name 
  for 
  a 
  Mono- 
  

   graptus, 
  which 
  certainly 
  is 
  the 
  species 
  Lapworth 
  subsequently 
  

   named 
  Monograptus 
  leptotheca. 
  That 
  the 
  Linnean 
  name 
  in- 
  

   dicates 
  quite 
  another 
  species 
  may 
  be 
  considered 
  as 
  certain, 
  

   the 
  containing 
  rock 
  being 
  from 
  Silesia, 
  where 
  Monogr. 
  lepto- 
  

   theca 
  is 
  wanting; 
  but 
  it 
  is 
  impossible 
  at 
  present 
  to 
  ascertain, 
  

   what 
  species 
  it 
  may 
  have 
  been. 
  

  

  Professor 
  Nilsson 
  of 
  Lund 
  is 
  quoted 
  by 
  Dr 
  Beck 
  ^) 
  and 
  

   Professor 
  Bichwald 
  ^) 
  as 
  having 
  published 
  in 
  the 
  Transac- 
  

   tions 
  of 
  the 
  Physiographic 
  Society 
  in 
  Lund 
  some 
  short 
  com- 
  

   ments 
  on 
  the 
  nature 
  of 
  the 
  graptolites; 
  but 
  in 
  reality 
  there 
  

   is 
  nothing 
  written 
  by 
  him 
  to 
  that 
  eflfect 
  in 
  the 
  publica- 
  

   tions 
  of 
  that 
  society. 
  Probably 
  Prof. 
  Nilsson 
  had 
  some 
  

   work 
  prepared 
  or 
  finished 
  in 
  manuscript 
  on 
  that 
  subject, 
  but 
  

   this 
  was 
  never 
  published. 
  Yet 
  from 
  Beck's 
  account, 
  and 
  

   also 
  from 
  those 
  of 
  Eichwald 
  and 
  Hisinger 
  it 
  seems, 
  tliat 
  

   Nilsson 
  was 
  the 
  first 
  who 
  distinctly 
  pronounced 
  the 
  opinion, 
  

   that 
  the 
  graptolites 
  are 
  polyparies 
  belonging 
  to 
  the 
  >'>Polypi 
  

   ceratoporae-i. 
  He 
  moreover 
  proposed 
  to 
  name 
  them 
  : 
  Priodon. 
  

   That 
  name 
  being 
  already 
  in 
  use 
  he 
  proposed 
  låter 
  the 
  name 
  

   of 
  Prionotus, 
  which 
  HisiNGER 
  accepted. 
  Yet 
  this 
  too 
  had 
  

   been 
  already 
  employed. 
  

  

  Hisinger 
  describes 
  and 
  delineates 
  in 
  Lethaea 
  Suecica, 
  

   Supplementum 
  1837, 
  five 
  species 
  and 
  in 
  Supplementwm 
  secundvm 
  

   1840 
  three 
  species, 
  of 
  which 
  Dictyonema 
  is 
  regarded 
  as 
  the 
  

   impression 
  of 
  a 
  monocotyledonous 
  plant. 
  They 
  are 
  all 
  in- 
  

   cluded 
  under 
  the 
  name 
  of 
  Prionotus 
  proposed 
  by 
  Nilsson. 
  

   Hisinger 
  moreover 
  partakes 
  of 
  Nilsson's 
  opinion 
  concerning 
  

   the 
  relation 
  of 
  the 
  graptolites 
  to 
  the 
  »Polypi 
  ceratoporae». 
  

  

  ') 
  Notes 
  on 
  Graptolites, 
  Silurian 
  system. 
  Part. 
  II, 
  pag. 
  695. 
  

   ^) 
  Lethaea 
  Rossica. 
  Vol. 
  I, 
  part 
  I, 
  pag. 
  424. 
  

  

  