﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  lOI 
  

  

  II 
  Spirifer 
  radiatus; 
  common 
  but 
  generally 
  crushed; 
  

   with 
  an 
  extended 
  hinge 
  line 
  and 
  form 
  and 
  proportions 
  

   similar 
  to 
  the 
  preceding 
  species. 
  The 
  striae 
  are 
  fine 
  and 
  

   flat 
  on 
  top 
  with 
  very 
  narrow 
  interspaces 
  altogether 
  very 
  

   similar 
  to 
  those 
  covering 
  the 
  pUcations 
  of 
  S. 
  n 
  i 
  a 
  g 
  a 
  r 
  e 
  n 
  - 
  

   sis. 
  A 
  scarcely 
  defined 
  plication 
  appears 
  on 
  each 
  side 
  

   of 
  the 
  sinus 
  in 
  some 
  specimens, 
  and 
  in 
  these 
  the 
  sinus 
  is 
  

   rather 
  sharply 
  defined 
  and 
  angular 
  at 
  the 
  bottom. 
  In 
  others 
  

   the 
  sinus 
  is 
  shallow 
  rounded 
  and 
  not 
  definitely 
  outlined 
  by 
  

   incipient 
  plications. 
  In 
  the 
  more 
  elongated 
  specimens 
  the 
  

   cardinal 
  angle 
  is 
  well 
  defined, 
  but 
  in 
  the 
  shorter 
  specimens 
  

   it 
  is 
  rounded. 
  

  

  i2Spirifercrispus 
  rare 
  

  

  13 
  Spirifer 
  sulcatus 
  rare 
  

  

  14 
  Dalmanella 
  elegant 
  u 
  la; 
  rare 
  and 
  with 
  greater 
  con- 
  

  

  vexity 
  than 
  that 
  of 
  the 
  specimens 
  in 
  the 
  overlying 
  shale. 
  

  

  15 
  Plectambonites 
  transversalis 
  rare 
  

  

  16 
  Leptaena 
  rhomboidalis 
  rare 
  

  

  17 
  Stropheodonta 
  corrugata 
  rare 
  

  

  18 
  Orthothetes 
  subplanus 
  rare 
  

  

  19 
  Strophonella 
  patenta 
  rare 
  

  

  Gastropoda 
  

  

  20 
  Platyostoma 
  niagarensis 
  rare 
  

  

  Trilobites 
  

  

  21 
  Illaenus 
  ioxus; 
  fragments 
  of 
  caudal 
  and 
  cephalic 
  shields 
  

  

  crowded 
  together 
  into 
  masses 
  sometimes 
  of 
  coxisiderable 
  

   size. 
  

   22Calymeneblumenbachi 
  rare 
  

  

  Bryozoa 
  

  

  23 
  Lichenalia 
  concentrica; 
  common 
  in 
  very 
  irregular 
  

   and 
  much 
  distorted 
  masses. 
  

   Corals 
  

  

  24Enterolasma 
  caliculus 
  common 
  

  

  Crinoids 
  

  

  25 
  Eucalyptocrinus; 
  fragments 
  of 
  root 
  stem 
  and 
  calyx. 
  

   In 
  the 
  lenses 
  below 
  Lewiston 
  hights 
  the 
  same 
  species 
  ex- 
  

   cept 
  nos. 
  2, 
  3, 
  9, 
  10, 
  14, 
  15, 
  17 
  to 
  20 
  and 
  25 
  have 
  been 
  

   found. 
  Rhynchotreta 
  cuneata 
  americana 
  has 
  

   more 
  the 
  features 
  of 
  the 
  same 
  species 
  from 
  the 
  western 
  

   Niagara 
  than 
  those 
  of 
  the 
  Rochester 
  shale 
  species. 
  

  

  