﻿CLASSIFICATION, 
  ETC. 
  OF 
  HAMILTON 
  AND 
  CHEMUNG 
  SERIES 
  69 
  

  

  4 
  Palaeoneilo 
  emarginata 
  (Con.) 
  Hall 
  (rr) 
  

  

  5 
  Leptodesma 
  rogersi 
  Hall 
  (rr) 
  

  

  6 
  L. 
  sp. 
  (rr) 
  

  

  Large 
  specimen. 
  

  

  7 
  Lumilicardium 
  ornatum 
  Hall 
  (?) 
  (rr) 
  

  

  Badly 
  broken. 
  

  

  8 
  Coleolus 
  tenuicinctum 
  Hall 
  (rr) 
  

  

  XXIII 
  A 
  4 
  . 
  Near 
  the 
  top 
  of 
  the 
  cascade 
  and 
  higher 
  in 
  the 
  glen 
  

   are 
  thin 
  sandstones. 
  In 
  a 
  layer 
  of 
  the 
  shales 
  near 
  the 
  top 
  of 
  the 
  

   highest 
  fall, 
  fossils 
  are 
  more 
  abundant, 
  specially 
  Spirifer 
  mesa- 
  

   costaUs 
  Hall 
  (?) 
  which 
  perhaps 
  should 
  be 
  referred 
  to 
  S. 
  mucro- 
  

   natus 
  (Con.) 
  Bill. 
  var. 
  posterus 
  Hall 
  and 
  Clarke. 
  This 
  species 
  is 
  

   common. 
  The 
  other 
  species 
  found 
  in 
  this 
  zone 
  are 
  Chonetes 
  

   seiigera 
  Hall 
  which 
  is 
  abundant, 
  and 
  Chonetes 
  seitula 
  Hall 
  which 
  

   is 
  very 
  rare. 
  

  

  XXIII 
  A 
  5 
  . 
  Above 
  the 
  shales 
  of 
  A 
  4 
  near 
  the 
  top 
  of 
  the 
  cascade 
  

   there 
  are 
  from 
  15 
  to 
  20 
  feet 
  of 
  sandstones 
  which 
  make 
  a 
  prominent 
  

   sandstone 
  zone, 
  some 
  of 
  the 
  layers 
  being 
  quite 
  coarse 
  grained 
  

   and 
  fairly 
  thick 
  bedded. 
  In 
  the 
  upper 
  part 
  of 
  the 
  zone 
  Spirifer 
  

   mcsasiriaUs 
  Hall 
  and 
  Aetmopteria 
  ooydi 
  (Con.) 
  Hall 
  are 
  common; 
  

   while 
  Spirifer 
  mesaoostalis 
  Hall 
  (?) 
  and 
  Tropidoleptus 
  carinatus 
  

   (Con.) 
  Hall 
  occur 
  sparingly. 
  

  

  XXIII 
  A 
  6 
  . 
  10 
  feet 
  higher 
  the 
  rocks 
  change 
  to 
  thinner 
  sandstones 
  

   and 
  coarse 
  arenaceous 
  shales. 
  A 
  layer 
  in 
  this 
  zone 
  contains 
  

   large 
  numbers 
  of 
  specimens 
  of 
  Spirifer 
  mesacostaUs 
  Hall 
  (?) 
  and 
  

   Tropidoleptus 
  carinatus 
  (Con.) 
  Hall. 
  The 
  fauna 
  is 
  as 
  follows: 
  

  

  1 
  Spvrifer 
  mesacostaUs 
  Hall 
  (?) 
  (a) 
  

  

  Some 
  specimens 
  resemble 
  S. 
  mucronatus 
  (Con.) 
  Bill., 
  but 
  

   most 
  of 
  them 
  agree 
  better 
  with 
  this 
  species. 
  

  

  2 
  Spirifer 
  mesastrialis 
  Hall 
  (c) 
  

  

  3 
  Tropidoleptus 
  carinatus 
  (Con.) 
  Hall 
  (a) 
  

  

  4 
  Chonetes 
  setigera 
  Hall 
  (r) 
  

  

  5 
  Microdon 
  {Cypricar 
  delta) 
  gregarius 
  Hall 
  (?) 
  (rr) 
  

  

  Broken 
  and 
  imperfect 
  specimen. 
  

  

  XXIII 
  A 
  8 
  . 
  For 
  about 
  35 
  feet 
  above 
  the 
  conspicuous 
  layer 
  of 
  fos- 
  

   sils 
  in 
  zone 
  A 
  6 
  the 
  rocks 
  are 
  partly 
  covered 
  along 
  the 
  glen 
  and 
  

  

  