﻿82 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Silver 
  creek. 
  About 
  200 
  feet 
  above 
  the 
  railroad 
  level, 
  along 
  this 
  

   stream 
  is 
  an 
  exposure 
  of 
  bluish 
  shale 
  that 
  breaks 
  upon 
  weather- 
  

   ing 
  into 
  small, 
  irregular 
  pieces. 
  These 
  shales 
  and 
  those 
  somewhat 
  

   higher 
  along 
  the 
  bank 
  of 
  the 
  old 
  "race 
  way" 
  are 
  quite 
  fossilif- 
  

   erous. 
  The 
  following 
  species 
  were 
  collected: 
  

  

  1 
  Spirifer 
  mesastrialis 
  Hall 
  (r) 
  

  

  2 
  8. 
  mucronatus 
  (Con.) 
  Bill. 
  (rr) 
  

  

  3 
  Clionetes 
  scitula 
  Hall 
  (a) 
  

  

  4 
  Camarotoechia 
  stevensi 
  (Hall) 
  H. 
  & 
  0. 
  , 
  (r) 
  

  

  5 
  Camarotoechia 
  eximia 
  (Hall) 
  H. 
  & 
  C. 
  (r) 
  

  

  6 
  Paracyclas 
  lirata 
  (Con.) 
  Hall 
  (r) 
  

  

  7 
  Microdon 
  (Cypricardella) 
  dellistriatus 
  (Con.) 
  Hall 
  (rr) 
  

  

  Ithaca 
  form. 
  

  

  8 
  Nuculites 
  oblongatus 
  Con. 
  (rr) 
  

  

  9 
  Nucula 
  bellistriata 
  (Con.) 
  Hall 
  var. 
  (rr) 
  

  

  10 
  Palaeoneilo 
  maxima 
  (Con.) 
  Hall 
  ' 
  (rr) 
  

  

  11 
  Leptodesma 
  sp. 
  (r) 
  

  

  12 
  Pleurotomaria 
  sp. 
  (r) 
  

  

  13 
  Bellerophon 
  sp. 
  ; 
  (rr) 
  

  

  14 
  TentaculUes 
  sp. 
  (rr) 
  

  

  15 
  Crinoid 
  segments 
  (r) 
  

  

  16 
  Strophalosia 
  sp. 
  (rr) 
  

  

  17 
  Tellinopsis 
  subemarginata 
  (Con.) 
  Hall 
  (rr) 
  

  

  18 
  Goniophora 
  carinata 
  (Con.) 
  Hall 
  (rr) 
  

  

  19 
  Coleolus 
  sp. 
  (rr) 
  

  

  20 
  Hyolithes 
  sp. 
  (rr) 
  

  

  XXIII 
  F 
  3 
  . 
  Farther 
  up 
  the 
  creek 
  is 
  a 
  calcareous 
  stratum 
  two 
  feet 
  

   or 
  more 
  in 
  thickness, 
  merging 
  into 
  a 
  sandstone 
  below 
  and 
  a 
  shale 
  

   above. 
  The 
  calcareous 
  part 
  is 
  very 
  hard 
  when 
  freshly 
  exposed 
  

   but 
  on 
  weathering 
  becomes 
  brown 
  and 
  friable. 
  The 
  shale 
  is 
  

   very 
  fossiliferous 
  though 
  the 
  specimens 
  are 
  badly 
  broken 
  and 
  

   the 
  number 
  of 
  species 
  is 
  small. 
  

  

  XXIII 
  F 
  4 
  . 
  From 
  the 
  limestone 
  to 
  the 
  upper 
  exposures, 
  sand- 
  

   stones 
  and 
  shales 
  alternate 
  with 
  lithologic 
  characters 
  similar 
  to 
  

   those 
  in 
  F 
  2 
  . 
  The 
  combined 
  thickness 
  of 
  the 
  exposed 
  rocks, 
  F 
  2 
  , 
  F 
  3 
  

  

  