﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  I99 
  

  

  Found 
  in 
  the 
  upper 
  Clinton 
  limestone 
  and 
  the 
  Clinton 
  lenses 
  and 
  

   abundantly 
  throughout 
  the 
  lower 
  and 
  middle 
  Rochester 
  shale 
  at 
  

   Niagara. 
  Also 
  at 
  Lockport 
  and 
  elsewhere 
  (Hall). 
  

  

  Spirifer 
  crispus 
  (Hisinger) 
  (Fig. 
  ii8) 
  (Hall. 
  1852. 
  Pal. 
  N. 
  Y. 
  

   2:262, 
  pi. 
  54) 
  

  

  Distinguishing 
  characters. 
  Small 
  size; 
  very 
  convex 
  pedicle 
  valve 
  

   with 
  incurved 
  beak 
  and 
  high 
  area, 
  which 
  does 
  not 
  extend 
  to 
  car- 
  

  

  ^ 
  ^ 
  

  

  ^ 
  

  

  Fig. 
  118 
  Spirifer 
  crispus 
  

  

  dinal 
  extremities; 
  broad 
  rounded 
  plications, 
  from 
  six 
  to 
  eight 
  on 
  

   each 
  valve, 
  strongest 
  near 
  the 
  fold 
  and 
  sinus 
  ; 
  fine, 
  elevated, 
  thread- 
  

   like 
  concentric 
  striae. 
  

  

  Found 
  in 
  the 
  Clinton 
  lenses 
  and 
  the 
  lower 
  and 
  particularly 
  the 
  

   middle 
  Rochester 
  shale 
  (Bryozoa 
  beds) 
  at 
  Niagara. 
  Also 
  at 
  Lock- 
  

   port 
  and 
  elsewhere 
  (Hall). 
  

  

  Spirifer 
  crispus 
  var 
  corallinensis 
  Graba.u. 
  (Geo!, 
  soc. 
  Am. 
  Bui. 
  

   11:352; 
  Hall. 
  1852. 
  Pal. 
  N. 
  Y. 
  2:328, 
  pi. 
  74, 
  fig. 
  Qa-h) 
  

  

  Distinguishing 
  characters. 
  Uniformly 
  obsolescent 
  plications, 
  an- 
  

   gular 
  mesial 
  sinus; 
  otherwise 
  like 
  preceding. 
  

  

  Found 
  in 
  the 
  Clinton 
  lower 
  limestone, 
  the 
  lenses, 
  and 
  the 
  lower 
  

   Rochester 
  shale. 
  Not 
  abundant. 
  This 
  variety 
  connects 
  S. 
  cris- 
  

   pus 
  with 
  S. 
  e 
  r 
  i 
  e 
  n 
  s 
  i 
  s 
  . 
  It 
  is 
  characteristic 
  of 
  the 
  Coralline 
  

   limestone 
  of 
  eastern 
  New 
  York. 
  

  

  Spirifer 
  eriensis 
  Grabau 
  (Fig. 
  119) 
  

   {Gcol. 
  soc. 
  Am. 
  Bui. 
  2:366, 
  pi. 
  21) 
  

  

  Distinguishing 
  characters. 
  Ventricose 
  

   pedicle 
  valve, 
  of 
  subrhomboidal 
  outline, 
  Fig. 
  119 
  spirifer 
  eriensis 
  

   high 
  area, 
  pronounced 
  angular 
  mesial 
  sinus 
  

  

  uniformly 
  increasing 
  in 
  width 
  forward, 
  strong 
  frontal 
  emargination 
  ; 
  

   sinus 
  bounded 
  by 
  strong 
  rounded 
  prominent 
  plications, 
  with 
  fainter 
  

  

  