﻿54C 
  

  

  SEW 
  rORK 
  BTATB 
  Ml 
  si:i 
  m 
  

  

  rtbuted 
  through 
  the 
  Stonee 
  river 
  and 
  Black 
  river 
  groups 
  

  

  &#« 
  ■* 
  M 
  a 
  c 
  PC 
  ttOtella, 
  made 
  known 
  by 
  ri- 
  

  

  rich 
  (49:648), 
  cornea 
  from 
  the 
  Btonea 
  river 
  group 
  (Lowville 
  lime- 
  

  

  V!I 
  {h{ 
  ' 
  oth 
  ailfi 
  found 
  belong 
  either 
  to 
  species 
  which 
  

  

  lived 
  throughout 
  the 
  Trenton 
  age 
  or 
  to 
  new 
  species 
  too 
  different 
  

  

  from 
  tlms<' 
  known 
  to 
  allow 
  taxonomic 
  conclusions. 
  

  

  li 
  is 
  obvious 
  (hat 
  the 
  faunas 
  of 
  both 
  the 
  pebbles 
  and 
  of 
  the 
  

  

  matrix 
  poinl 
  to 
  a 
  low 
  horizon 
  in 
  the 
  Trenton 
  stage 
  which 
  may 
  

  

  Bcend 
  int,) 
  ^e 
  Black 
  river 
  Btage. 
  A 
  threefold 
  interest 
  

  

  attaches, 
  therefore, 
  to 
  this 
  fauna, 
  firstly 
  that 
  of 
  its 
  location 
  in 
  the 
  

  

  rtern 
  region, 
  secondly 
  that 
  of 
  (ho 
  remarkable 
  character 
  of 
  its 
  

  

  components 
  and 
  finally, 
  its 
  intercalation 
  in 
  the 
  Normans 
  kill 
  

  

  sh.i 
  

  

  CONGLOMERATE 
  BED 
  ON 
  BYSEDORPH 
  HILL 
  

  

  This 
  interest 
  is 
  hightened 
  by 
  the 
  occurrence 
  of 
  another 
  con- 
  

   glomerate 
  bed 
  mi 
  the 
  top 
  of 
  Rysedorph 
  hill 
  or 
  the 
  Pinnacle, 
  east 
  

   t>f 
  l 
  aer 
  (station 
  36 
  on 
  map), 
  which 
  contains 
  the 
  same 
  groups 
  

  

  of 
  Trenton 
  pebbles 
  bearing 
  the 
  same 
  faunas,augmented,howeYei, 
  

   by 
  numerous 
  other 
  species, 
  in 
  part 
  new. 
  1 
  The 
  peculiar 
  antique 
  

   character 
  of 
  this 
  Trenton 
  fauna 
  of 
  Rysedorph 
  hill 
  finds 
  its 
  most 
  

   gnant 
  expression 
  in 
  the 
  numerous 
  specimens 
  of 
  Am 
  pyx 
  

   hastatus 
  sp. 
  n. 
  (see 
  pi. 
  1, 
  fig. 
  i) 
  and 
  Remopleurides 
  

   lin 
  gttatus 
  s 
  P 
  . 
  n. 
  found 
  in 
  the 
  same 
  pebbles 
  with 
  

   "•aurusandPterygometopua. 
  As 
  before 
  ob- 
  

   served, 
  Ami 
  found 
  similar 
  antique 
  forms 
  in 
  the 
  Dicellograptus 
  

   /.-ic- 
  of 
  the 
  Quebec 
  massive. 
  The 
  different 
  composition 
  of 
  this 
  

   '" 
  Trenton 
  fauna 
  when 
  compared 
  with 
  the 
  other 
  Trenton 
  

   of 
  the 
  state, 
  is 
  a 
  fitting 
  corollary 
  to 
  the 
  restriction 
  of 
  the 
  

   kill 
  fauna, 
  with 
  which 
  it 
  is 
  homotaxial. 
  to 
  the 
  eastern 
  

   the 
  state. 
  Both 
  faunae, 
  together 
  with 
  Ami's 
  inter- 
  

   ft, 
  point 
  to 
  conditions 
  and 
  connections 
  of 
  this 
  

   a 
  border 
  sea 
  altogether 
  different 
  from 
  those 
  of 
  the 
  regions 
  

  

  the 
  locality 
  termed 
  by 
  Emmons 
  (Am. 
  geol. 
  pt 
  2. 
  p. 
  7", 
  and 
  

   Walcott 
  I 
  b 
  tonment 
  hill." 
  ' 
  

  

  