﻿218 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  1 
  Spirifer 
  mesastrialis 
  Hall 
  (aa) 
  

  

  2 
  S. 
  mucronatus 
  (Con.) 
  Bill. 
  (?) 
  (it) 
  

  

  3 
  Tropidoleptus 
  carinatus 
  (Con.) 
  Hall 
  (rr) 
  

  

  4 
  Camarotoechia 
  stevemi 
  (Hall) 
  H. 
  & 
  C. 
  (?) 
  (c) 
  

  

  Poorly 
  preserved. 
  

  

  5 
  Nucula 
  corbaliformis 
  Hall 
  (rr) 
  

  

  6 
  Leda 
  diversa 
  Hall 
  (rr) 
  

  

  7 
  Goniophora 
  oarinata 
  (Con.) 
  Hall 
  (rr) 
  

  

  8 
  Coleolus 
  aciculum 
  Hall 
  (rr) 
  

  

  9 
  Microdon 
  (Cypricar 
  delta) 
  complanatus 
  Hall 
  (rr) 
  

  

  10 
  M. 
  (C. 
  ) 
  gregarius 
  Hall 
  (r). 
  

  

  11 
  Actinopteria 
  boydi 
  (Con.) 
  Hall 
  (c) 
  

  

  12 
  Pterinopecten 
  sahorMcularis 
  Hall 
  (?) 
  (c) 
  

  

  It 
  is 
  to 
  be 
  noted 
  that 
  Spirifer 
  mesastrialis 
  Hall 
  is 
  abundant 
  in 
  

   the 
  three 
  faunas 
  of 
  LXXY 
  A 
  2 
  > 
  4 
  , 
  O 
  2 
  and 
  X 
  2 
  and 
  that 
  the 
  species 
  of 
  

   Brachiopoda 
  are 
  nearly 
  the 
  same 
  in 
  the 
  three 
  lists. 
  X 
  2 
  is 
  about 
  

   one 
  and 
  one 
  quarter 
  miles 
  northeast 
  of 
  O 
  2 
  and 
  approximately 
  110 
  

   feet 
  higher. 
  It 
  seems 
  reasonably 
  certain 
  to 
  the 
  writer 
  that 
  these 
  

   three 
  zones 
  are 
  near 
  the 
  same 
  horizon 
  and 
  that 
  there 
  is 
  a 
  general 
  

   dip 
  of 
  about 
  90 
  feet 
  a 
  mile 
  to 
  the 
  southwest 
  across 
  this 
  part 
  of 
  

   the 
  Schoharie 
  valley. 
  The 
  observations 
  of 
  dip 
  made 
  on 
  the 
  cliff 
  

   one 
  mile 
  below 
  Gilboa 
  and 
  at 
  the 
  Manorkill 
  falls 
  do 
  not 
  agree 
  

   with 
  this 
  conclusion 
  and 
  possibly 
  the 
  fossils 
  occur 
  at 
  three 
  dif- 
  

   ferent 
  horizons, 
  but 
  the 
  writer 
  inclines 
  to 
  the 
  former 
  opinion. 
  65 
  

   feet 
  above 
  X 
  2 
  are 
  thin, 
  gray 
  sandstones 
  eight 
  feet 
  in 
  thickness, 
  

   but 
  no 
  fossils 
  were 
  found 
  in 
  this 
  ledge. 
  Then 
  for 
  117 
  feet 
  the 
  

   rocks 
  are 
  concealed 
  when 
  another 
  gray 
  ledge 
  of 
  thin 
  sandstones 
  

   is 
  reached 
  at 
  the 
  top 
  of 
  the 
  hill, 
  approximately 
  900 
  feet 
  above 
  

   the 
  Schoharie 
  river 
  level. 
  The 
  details 
  of 
  this 
  section 
  are 
  shown 
  

   in 
  the 
  following 
  diagram. 
  

  

  