﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  35 
  

  

  13 
  We 
  have 
  observed 
  that 
  the 
  passage 
  from 
  New 
  York 
  through 
  

   to 
  Gaspe 
  and 
  New 
  Brunswick 
  was 
  undisturbed 
  during 
  the 
  earhest 
  

   stages 
  of 
  the 
  Devonic. 
  Probably 
  in 
  the 
  later 
  stage 
  represented 
  

   by 
  the 
  extensive 
  Grande 
  Greve 
  limestones 
  it 
  was 
  less 
  clear, 
  the 
  

   channel 
  widened 
  out 
  into 
  a 
  basin 
  of 
  rapid 
  propagation 
  from 
  which 
  

   migration 
  to 
  the 
  southwest 
  took 
  place 
  freely. 
  We 
  believe 
  the 
  evi- 
  

   dence 
  fully 
  indicates 
  that 
  during 
  all 
  these 
  stages 
  of 
  the 
  Eodevonic 
  

   the 
  direction 
  of 
  migration 
  was 
  from 
  the 
  north 
  inward 
  and 
  south- 
  

   ward. 
  Reference 
  has 
  been 
  made 
  to 
  the 
  occurrence 
  of 
  the 
  Eode- 
  

   vonic 
  on 
  St 
  Helens 
  island, 
  Montreal 
  and 
  to 
  the 
  presumption 
  that 
  it 
  

   indicates 
  the 
  remnant 
  of 
  a 
  backset 
  along 
  the 
  St 
  Lawrence 
  trough 
  

   of 
  these 
  waters, 
  rather 
  than 
  any 
  connection 
  with 
  New 
  York 
  

   through 
  the 
  Champlain 
  trough. 
  We 
  find 
  no 
  reason 
  for 
  modifying 
  

   this 
  view 
  as 
  there 
  is 
  no 
  single 
  factor 
  which 
  presumes 
  a 
  Paleozoic 
  

   water 
  connection 
  along 
  the 
  Champlain 
  graben 
  during 
  a 
  period 
  so 
  

   late 
  as 
  the 
  Devonic. 
  

  

  14 
  The 
  Gaspe 
  sandstones 
  indicate 
  (as 
  we 
  have 
  suggested) 
  a 
  

   general 
  breaking 
  down 
  of 
  the 
  barriers 
  of 
  the 
  northern 
  channel, 
  by 
  

   a 
  transgression 
  over 
  the 
  Siluric 
  beds 
  adjoining 
  and 
  a 
  widening 
  out 
  

   of 
  the 
  area 
  in 
  such 
  a 
  way 
  as 
  to 
  constitute 
  in 
  large 
  part 
  flood 
  

   deposit 
  or 
  barachois 
  conditions 
  throughout 
  the 
  eastern 
  part 
  of 
  the 
  

   Gaspe 
  peninsula. 
  These 
  conditions 
  continued 
  throughout 
  the 
  

   Middle 
  Devonic 
  as 
  shown 
  by 
  the 
  notable 
  percentage 
  of 
  New 
  York 
  

   Hamilton 
  species 
  in 
  these 
  rocks 
  commingled 
  with 
  highly 
  typical 
  

   survivors 
  of 
  the 
  earlier 
  or 
  Grande 
  Greve 
  fauna. 
  The 
  New 
  York 
  

   species 
  are 
  here 
  clearly 
  the 
  invaders, 
  having 
  entered 
  this 
  province 
  

   by 
  the 
  still 
  open 
  waterway 
  from 
  the 
  southwest. 
  The 
  remains 
  

   themselves, 
  whether 
  of 
  Grande 
  Greve 
  or 
  Hamilton 
  species, 
  we 
  

   regard 
  as 
  overwashed 
  into 
  their 
  present 
  position 
  from 
  outside 
  the 
  

   barrier 
  bounding 
  the 
  barachois 
  and 
  not 
  native 
  to 
  the 
  sandy 
  terrig- 
  

   enous 
  sediments, 
  abounding 
  in 
  plant 
  remains 
  with 
  which 
  they 
  are 
  

   associated. 
  

  

  Monograph 
  of 
  the 
  Eurypterida. 
  Recent 
  years 
  of 
  field 
  explora- 
  

   tion 
  have 
  brought 
  to 
  light 
  very 
  extensive 
  collections 
  of 
  these 
  inter- 
  

   esting 
  ancient 
  Crustacea 
  from 
  New 
  York 
  and 
  beyond 
  any 
  doubt 
  

   such 
  a 
  wealth 
  of 
  material 
  representing 
  this 
  extinct 
  order 
  has 
  never 
  

   before 
  been 
  brought 
  together. 
  It 
  has 
  been 
  the 
  purpose 
  of 
  the 
  

   Paleontologist 
  to 
  utilize 
  this 
  exceptional 
  material 
  as 
  the 
  basis 
  of 
  a 
  

   revision 
  of 
  the 
  group 
  and 
  as 
  an 
  opportunity 
  for 
  expanding 
  and 
  

   summarizing 
  his 
  previous 
  publications 
  on 
  this 
  subject. 
  During 
  

   the 
  past 
  year 
  the 
  Assistant 
  Paleontologist 
  has 
  been 
  able 
  to 
  

   devote 
  considerable 
  study 
  to 
  this 
  subject 
  with 
  results 
  of 
  much 
  

  

  