﻿34:2 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Apr. 
  27* 
  

  

  Strata 
  of 
  the 
  same 
  character 
  continue 
  beautifully 
  exposed 
  in 
  a 
  hori- 
  

   zontal 
  section 
  on 
  the 
  shore 
  under 
  high-water 
  mark 
  until 
  we 
  reach 
  

   the 
  mouth 
  of 
  M'Adani's 
  Brook. 
  In 
  these 
  I 
  found 
  only 
  indistinct 
  

   fossils 
  until 
  I 
  reached 
  this 
  point, 
  where 
  there 
  are 
  many 
  specimens 
  of 
  

   a 
  large 
  and 
  peculiar 
  species 
  of 
  Orihis. 
  Up 
  this 
  brook 
  the 
  various 
  

   strata 
  above 
  the 
  last 
  are 
  seen, 
  with 
  their 
  characteristic 
  organisms, 
  

   the 
  synclinal 
  axis 
  being 
  again 
  approximately 
  apparent. 
  The 
  strata 
  

   of 
  C 
  under 
  examination 
  are 
  not 
  only 
  exposed 
  on 
  the 
  shore 
  and 
  in 
  

   the 
  brooks 
  through 
  which 
  the 
  line 
  of 
  section 
  passes, 
  but 
  also 
  in 
  

   numerous 
  and 
  considerable 
  outcrops 
  throughout 
  the 
  breadth 
  of 
  the 
  

   group. 
  On 
  the 
  shore 
  at 
  the 
  mouth 
  of 
  the 
  brook, 
  and 
  a 
  little 
  above 
  

   the 
  bed 
  with 
  Orthis, 
  there 
  is 
  a 
  stratum 
  with 
  Homalonotus, 
  Crinoids, 
  

   and 
  Tentaculites. 
  Immediately 
  above 
  this, 
  the 
  strata 
  at 
  the 
  brook, 
  

   and 
  onward 
  to 
  a 
  considerable 
  distance, 
  become 
  shaly, 
  and 
  contain 
  

   numerous 
  nodular 
  blocks, 
  generally 
  of 
  large 
  size. 
  These 
  are 
  often 
  

   coated 
  with 
  fossils, 
  especially 
  Strophomena, 
  Then 
  we 
  have 
  hard, 
  

   uniform, 
  light- 
  coloured 
  argillaceous 
  strata, 
  which, 
  on 
  comparison 
  

   with 
  those 
  of 
  other 
  localities, 
  I 
  am 
  disposed 
  to 
  regard 
  as 
  the 
  typical 
  

   strata 
  of 
  the 
  group 
  C. 
  A 
  remarkable 
  feature 
  of 
  these 
  beds 
  is 
  the 
  

   great 
  development 
  of 
  a 
  species 
  of 
  OrtJioceras. 
  It 
  occurs 
  here 
  of 
  a 
  

   size 
  unequalled 
  either 
  before 
  or 
  after, 
  and 
  unusually 
  numerous. 
  In 
  

   the 
  other 
  locality 
  referred 
  to 
  — 
  East 
  Kiver, 
  Pictou 
  country 
  — 
  where 
  

   this 
  subdivision 
  was 
  first 
  recognized 
  by 
  me, 
  and 
  on 
  this 
  horizon, 
  I 
  

   found 
  the 
  largest 
  OrtJioceras 
  that 
  has 
  yet 
  been 
  found 
  in 
  Nova 
  Scotia. 
  

   In 
  the 
  same 
  strata 
  of 
  our 
  section 
  there 
  is 
  also 
  a 
  characteristic 
  species 
  

   of 
  Homalonotus. 
  

  

  The 
  following 
  is 
  a 
  list 
  of 
  the 
  principal 
  fossils 
  : 
  — 
  

  

  Orthoceraa 
  (several 
  species). 
  Rhynchonella 
  Wilsoni, 
  Soiv. 
  (R. 
  Saf- 
  

  

  Bellerophon 
  expansus 
  ?, 
  Sow. 
  

  

  Belleropbon 
  trilobatus, 
  Sow. 
  

  

  Eellerophon 
  carinatus, 
  Sow. 
  

  

  Clidopborus. 
  

  

  Murchisonia. 
  

  

  Platyschisma 
  belicites, 
  Sow. 
  

  

  Acroculia 
  haliotis, 
  Sow. 
  

  

  Avicula, 
  sp. 
  

  

  ►Stropliomena, 
  sp. 
  

  

  Athyris, 
  very 
  like 
  A. 
  tumida, 
  Dalm. 
  

  

  Atrypa 
  reticulata, 
  finely 
  and 
  coarsely 
  

  

  ribbed 
  varieties. 
  

   Spirifer 
  rugacosta, 
  Hall. 
  

  

  A 
  little 
  above 
  the 
  Orthoceras-strata 
  are 
  beds 
  with 
  abundance 
  of 
  a 
  

   species 
  of 
  liJiyncJionella 
  having 
  coarse 
  wavy 
  ribs, 
  and 
  then 
  we 
  have 
  

   a 
  stratum 
  of 
  considerable 
  thickness 
  deeply 
  coloured 
  with 
  oxide 
  of 
  

   iron 
  ; 
  the 
  latter 
  may 
  be 
  considered 
  as 
  the 
  line 
  of 
  demarcation 
  between 
  

   the 
  groups 
  C 
  and 
  D, 
  as 
  there 
  are 
  no 
  characteristic 
  fossils 
  between 
  

   this 
  and 
  the 
  strata 
  where 
  the 
  characteristic 
  organisms 
  of 
  D 
  become 
  

   evident. 
  An 
  unknown 
  organism 
  characterizes 
  these 
  passage-(?) 
  

   beds, 
  and 
  is 
  the 
  only 
  fossil 
  known 
  in 
  them. 
  The 
  strata 
  have 
  a 
  

   varying 
  strike 
  above 
  the 
  beds 
  B, 
  B', 
  of 
  the 
  series. 
  From 
  this 
  cir- 
  

   cumstance 
  the 
  vertical 
  section 
  on 
  the 
  shore 
  appears 
  somewhat 
  per- 
  

   plexing, 
  but 
  the 
  horizontal 
  section 
  shows 
  very 
  distinctly 
  the 
  ascending 
  

  

  fordi, 
  Hall.) 
  

   Bbyncbonella 
  (other 
  species). 
  

   Cbonetes. 
  

   Orthis. 
  

   Discina. 
  

   Lingula. 
  

   Calymene. 
  

   Homalonotus. 
  

   Crinoidea 
  (several 
  species). 
  

   Favosites. 
  

   Stenopora. 
  

   Tentaculites. 
  

  

  