﻿OF 
  THE 
  BALTIC 
  PKOVI!S 
  T 
  CES 
  OF 
  RUSSIA. 
  

  

  531 
  

  

  in 
  Finland 
  to 
  Kalmar 
  in 
  Sweden. 
  The 
  section 
  is 
  delineated 
  on 
  

   page 
  59 
  (P 
  8) 
  of 
  my 
  memoir, 
  and 
  may 
  be 
  repeated 
  at 
  this 
  place. 
  

  

  Ideal 
  Section 
  of 
  the 
  Silurian 
  Formation 
  between 
  Wiborg 
  in 
  Finland 
  

   and 
  Kalmar 
  in 
  Sweden. 
  

  

  S.W. 
  M".E. 
  

  

  

  a. 
  Upper 
  Silurian. 
  

  

  b. 
  Lower 
  Silurian. 
  

   Concluding: 
  Remarks. 
  

  

  Cambrian. 
  

  

  In 
  the 
  foregoing 
  pages 
  I 
  have 
  merely 
  given 
  an 
  account 
  of 
  the 
  

   stratigraphical 
  part 
  of 
  my 
  memoir. 
  I 
  may 
  now 
  be 
  permitted 
  to 
  

   make 
  also 
  a 
  few 
  remarks 
  upon 
  its 
  palaeontological 
  contents. 
  Com- 
  

   mencing 
  in 
  the 
  year 
  1853, 
  but 
  delayed 
  by 
  interruptions 
  caused 
  by 
  Si- 
  

   berian 
  expeditions 
  from 
  1859-63 
  and 
  1866, 
  and 
  by 
  a 
  long 
  illness 
  

   from 
  1868-70, 
  I 
  have 
  spent 
  the 
  largest 
  part 
  of 
  each 
  summer 
  in 
  

   studying 
  our 
  Silurian 
  system 
  and 
  in 
  collecting 
  fossils 
  from 
  it. 
  I 
  have 
  

   founded 
  a 
  separate 
  Silurian 
  collection 
  in 
  the 
  provincial 
  museum 
  of 
  

   Reval, 
  where 
  I 
  have 
  left 
  sufficient 
  room 
  to 
  place 
  all 
  the 
  rich 
  materials 
  

   brought 
  together 
  every 
  summer 
  from 
  the 
  various 
  points 
  of 
  our 
  

   Silurian 
  territory. 
  In 
  addition, 
  Silurian 
  fossils 
  in 
  the 
  remaining 
  

   museums 
  of 
  our 
  country 
  are 
  at 
  my 
  disposal, 
  for 
  instsnce, 
  the 
  col- 
  

   lection 
  of 
  Volborth, 
  in 
  the 
  Museum 
  of 
  the 
  St. 
  Petersburg 
  Aca- 
  

   demy, 
  the 
  collection 
  of 
  Eichwald, 
  presented 
  to 
  the 
  St. 
  Petersburg 
  

   University, 
  the 
  collection 
  of 
  Pander 
  in 
  the 
  St. 
  Petersburg 
  School 
  

   of 
  Mines, 
  the 
  collections 
  at 
  Dorpat 
  in 
  the 
  University 
  Museum 
  and 
  

   the 
  Museum 
  of 
  the 
  Natural-History 
  Society, 
  &c. 
  Not 
  only 
  so, 
  but 
  

   I 
  have 
  visited 
  several 
  times 
  the 
  museums 
  of 
  Sweden 
  and 
  Norway, 
  

   and 
  the 
  most 
  important 
  Silurian 
  localities 
  in 
  those 
  countries. 
  In 
  

   1875 
  I 
  had 
  also 
  the 
  opportunity 
  of 
  studying 
  for 
  a 
  few 
  days 
  the 
  

   British 
  collections. 
  Moreover, 
  I 
  have 
  studied 
  divers 
  collections 
  of 
  

   Silurian 
  erratics 
  in 
  the 
  museums 
  of 
  Northern 
  Germany, 
  from 
  which 
  

   region 
  many 
  species 
  have 
  been 
  described 
  which 
  have 
  not 
  hitherto 
  

   been 
  found 
  in 
  their 
  original 
  beds. 
  In 
  this 
  way 
  it 
  is 
  possible 
  for 
  me 
  

   to 
  make 
  full 
  use 
  at 
  one 
  time 
  of 
  all 
  the 
  different 
  collections 
  from 
  our 
  

   Silurians, 
  brought 
  together 
  at 
  different 
  times 
  by 
  divers 
  collectors 
  ; 
  

   and 
  it 
  is 
  my 
  purpose 
  to 
  perform 
  the 
  task 
  of 
  describing 
  and 
  figuring, 
  

   in 
  an 
  accurate 
  way, 
  all 
  our 
  Silurian 
  fossils, 
  if 
  my 
  life 
  be 
  spared. 
  

  

  The 
  memoir 
  I 
  have 
  just 
  completed 
  contains 
  the 
  descriptions 
  and 
  

   figures 
  of 
  three 
  families 
  of 
  Trilobites, 
  the 
  Phacopidae, 
  Cheiruridae, 
  

   and 
  Encrinuridoe, 
  altogether 
  60 
  species. 
  The 
  number 
  of 
  all 
  our 
  

   Trilobites 
  will 
  be 
  about 
  150 
  species, 
  of 
  which 
  only 
  15 
  are 
  Upper 
  

   Silurian; 
  all 
  the 
  rest 
  are 
  Lower 
  Silurian. 
  The 
  next 
  part 
  of 
  my 
  

  

  