﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  I97 
  

  

  the 
  "genera 
  Climacograptus, 
  Ci 
  yptograptiis 
  etc. 
  On 
  account 
  of 
  the 
  

   great 
  interest 
  which 
  this 
  graptoHte 
  occurrence 
  has 
  in 
  regard 
  to 
  a 
  

   possible 
  correlation 
  by 
  intercalation 
  of 
  the 
  corresponding 
  graptolite 
  

   horizon 
  with 
  the 
  limestone 
  series 
  of 
  the 
  Trenton, 
  this 
  faunule 
  will 
  

   be 
  studied 
  separately 
  after 
  more 
  extensive 
  collecting. 
  

  

  The 
  fact 
  of 
  the 
  occurrence 
  of 
  graptolites 
  proper 
  together 
  with 
  the 
  

   supposed 
  marine 
  algae 
  may 
  seem 
  suggestive 
  of 
  the 
  graptolite 
  nature 
  

   of 
  all 
  the 
  fossils, 
  especially 
  if 
  it 
  is 
  taken 
  in 
  account 
  that 
  some 
  of 
  

   the 
  algoid 
  forms 
  exhibit 
  in 
  the 
  carbonaceous 
  films 
  they 
  have 
  

   left, 
  the 
  distinctness 
  and 
  sharpness 
  of 
  graptolite 
  remains 
  in 
  spite 
  

   of 
  their 
  subdivision 
  into 
  hair-fine 
  branches. 
  On 
  the 
  other 
  hand 
  it 
  

   could 
  be 
  urged 
  that 
  from 
  the 
  well 
  recognized 
  evidence 
  of 
  the 
  

   growth 
  of 
  many 
  graptolites 
  on 
  seaweeds 
  the 
  concurrence 
  of 
  the 
  

   two 
  in 
  the 
  same 
  bed 
  is 
  a 
  logical 
  corollary. 
  But, 
  if 
  the 
  surrounding 
  

   conditions 
  at 
  Glens 
  Falls 
  are 
  taken 
  into 
  account, 
  it 
  becomes 
  evident 
  

   that 
  the 
  graptolites 
  and 
  the 
  algoid 
  fossils 
  belong 
  to 
  different 
  marine 
  

   life 
  zones. 
  The 
  very 
  irregular 
  surface 
  of 
  the 
  thin 
  bedded 
  limestone 
  

   and 
  the 
  patchy 
  distribution 
  of 
  the 
  black 
  shale 
  in 
  depressions 
  of 
  

   the 
  limestone, 
  indicate 
  that 
  the 
  deposition 
  took 
  place 
  in 
  rather 
  turbu- 
  

   lent 
  water. 
  The 
  comminuted 
  condition 
  of 
  the 
  true 
  graptolites 
  

   shows 
  that 
  they 
  drifted 
  in 
  from 
  the 
  open 
  sea, 
  while 
  the 
  fine 
  preser- 
  

   vation 
  of 
  the 
  much 
  more 
  delicate 
  algalike 
  remains 
  indicates 
  that 
  

   they 
  grew 
  where 
  they 
  are 
  found 
  and 
  were 
  sessile 
  forms 
  of 
  the 
  

   I'ttoral 
  zone. 
  

  

  Dr 
  liO'Vey 
  has 
  had 
  the 
  kindness 
  to 
  send 
  me 
  the 
  types 
  of 
  two 
  of 
  

   the 
  species 
  of 
  marine 
  algae 
  described 
  by 
  Professor 
  Whitfield, 
  for 
  

   comparison 
  and 
  study. 
  The 
  structural 
  details 
  of 
  these 
  — 
  presently 
  

   to 
  be 
  descril:)ed 
  — 
  leave 
  no 
  doubt 
  of 
  their 
  vegetable 
  origin. 
  One 
  

   IS 
  a 
  distinct 
  coralline 
  alga 
  from 
  the 
  Trenton 
  of 
  Middleville, 
  N. 
  Y. 
  

   [sec 
  pi. 
  T, 
  fig. 
  i], 
  the 
  other 
  (Callithamnopsis 
  fruticosa) 
  

   a 
  seaweed 
  from 
  the 
  Trenton 
  oi 
  Platteville, 
  Wis. 
  The 
  latter 
  

   is 
  so 
  closely 
  related 
  to 
  one 
  of 
  the 
  Glens 
  Falls 
  forms 
  (C 
  . 
  d 
  e 
  1 
  i 
  c 
  a 
  - 
  

   tula) 
  that 
  by 
  inference 
  the 
  latter 
  must 
  also 
  be 
  an 
  alga 
  although 
  

   its 
  structural 
  features 
  are 
  not 
  as 
  distinctly 
  seen. 
  We 
  will 
  for 
  this 
  

   reason 
  first 
  note 
  these 
  two 
  longer 
  known 
  species 
  of 
  manifest 
  algal 
  

   character 
  and 
  then 
  attempt 
  to 
  demonstrate 
  the 
  vegetable 
  nature 
  

   of 
  the 
  Glens 
  Falls 
  forms 
  by 
  reference 
  to 
  them. 
  

  

  Primicorallina 
  Whitfield 
  

   This 
  genus 
  of 
  calcareous 
  algae 
  was 
  erected 
  for 
  a 
  single 
  species, 
  

   P. 
  trentonensis 
  Whitfield, 
  from 
  the 
  Trenton 
  limestone 
  of 
  

   Middleville. 
  The 
  form 
  is 
  described 
  by 
  its 
  author 
  as 
  follows: 
  " 
  (The 
  

  

  