﻿282 
  E. 
  M. 
  Kindle 
  — 
  Age 
  of 
  the 
  Ewryjptevids 
  of 
  KoJcomo. 
  

  

  Art. 
  XXYII. 
  — 
  The 
  Age 
  of 
  the 
  Eurypterids 
  of 
  Kokomo. 
  

   Indiana;* 
  by 
  E. 
  M. 
  Kindle. 
  

  

  The 
  small 
  but 
  interesting 
  Eurypterid 
  fauna 
  which 
  charac- 
  

   terizes 
  the 
  Kokomo 
  limestone 
  of 
  Indiana 
  has 
  recently 
  been 
  

   admirably 
  described 
  and 
  figured 
  by 
  Doctor 
  J. 
  M. 
  Clarke 
  and 
  

   Doctor 
  fiuedemannf 
  in 
  connection 
  with 
  the 
  Eurypterid 
  faunas 
  

   of 
  New 
  York. 
  The 
  opinion 
  concerning 
  the 
  age 
  of 
  this 
  remark- 
  

   able 
  fauna 
  which 
  these 
  authors 
  express, 
  however, 
  invites 
  dis- 
  

   cussion 
  since 
  it 
  is 
  at 
  variance 
  with 
  the 
  view 
  of 
  some 
  geologists 
  

   who 
  have 
  a 
  knowledge 
  of 
  the 
  field 
  relations 
  of 
  the 
  beds 
  hold- 
  

   ing 
  it 
  and 
  of 
  the 
  formation 
  with 
  which 
  it 
  is 
  correlated. 
  The 
  

   matter 
  seems 
  to 
  be 
  of 
  sufficient 
  importance 
  to 
  justify 
  a 
  brief 
  

   review 
  of 
  the 
  evidence 
  bearing 
  on 
  the 
  question 
  of 
  the 
  age 
  of 
  

   the 
  beds. 
  If, 
  as 
  Clarke 
  and 
  Ruedemann 
  state, 
  the 
  Kokomo 
  

   Eurypterid 
  fauna 
  is 
  of 
  Lockport 
  age, 
  it 
  may 
  well 
  stand 
  in 
  an 
  

   ancestral 
  relation 
  to 
  the 
  New 
  York 
  Salina 
  Eurypterid 
  faunas 
  

   which 
  they 
  describe. 
  This 
  is 
  the 
  conclusion 
  which 
  the 
  reader 
  

   is 
  apt 
  to 
  draw 
  from 
  an 
  inspection 
  of 
  the 
  tables 
  on 
  pages 
  91, 
  93, 
  

   and 
  431:}: 
  and 
  the 
  discussion 
  of 
  the 
  new 
  subgenus 
  Onycliopterus 
  

   from 
  Kokomo. 
  The 
  other 
  elements 
  of 
  the 
  Kokomo 
  fauna 
  and 
  

   the 
  stratigraphy 
  of 
  the 
  region 
  do 
  not, 
  in 
  the 
  writer's 
  opinion, 
  

   bear 
  out 
  this 
  inference. 
  

  

  Clarke 
  and 
  Kuedemann 
  correlate 
  the 
  Kokomo 
  limestone 
  

   with 
  the 
  Noblesville 
  limestone 
  of 
  Indiana 
  and 
  the 
  Lockport 
  of 
  

   New 
  York, 
  and 
  use 
  indiscriminately 
  the 
  terms 
  Kokomo 
  lime- 
  

   stone, 
  Kokomo 
  waterlime 
  and 
  Noblesville 
  waterlime.§ 
  

  

  This 
  correlation 
  is 
  in 
  harmony 
  with 
  a 
  suggestion 
  made 
  by 
  

   Schuchert, 
  who, 
  in 
  a 
  review 
  of 
  the 
  writer's 
  work 
  on 
  the 
  

   " 
  Stratigraphy 
  and 
  Palaeontology 
  of 
  the 
  Niagara 
  of 
  Northern 
  

   Indiana," 
  suggested 
  the 
  probable 
  absence 
  " 
  of 
  the 
  water-lime 
  

   horizon 
  in 
  Northern 
  Indiana."! 
  Schuchert 
  was 
  probably 
  in 
  

   part 
  influenced 
  in 
  expressing 
  this 
  opinion 
  by 
  the 
  still 
  earlier 
  

   reference 
  of 
  Conchidium 
  colletti, 
  the 
  most 
  conspicuous 
  brachi- 
  

   opod 
  of 
  the 
  Kokomo 
  fauna, 
  to 
  the 
  Niagara 
  limestone 
  by 
  Hall 
  

   and 
  Clarke. 
  ^ 
  The 
  writer 
  had, 
  at 
  the 
  time 
  Schuchert's 
  review, 
  

   appeared, 
  a 
  nearly 
  complete 
  collection 
  of 
  the 
  Kokomo 
  fauna 
  

   and 
  intended, 
  when 
  opportunity 
  for 
  its 
  illustration 
  offered, 
  to 
  

   present 
  the 
  strong 
  array 
  of 
  evidence 
  which 
  it 
  furnished 
  against 
  

   the 
  inferred 
  equivalence 
  of 
  the 
  Kokomo 
  and 
  Lockport 
  faunas. 
  

   Other 
  duties 
  intervened 
  however, 
  and 
  at 
  a 
  comparatively 
  recent 
  

  

  * 
  Published 
  with 
  the 
  permission 
  of 
  the 
  Director 
  of 
  the 
  Geological 
  Survey 
  

   of 
  Canada. 
  

  

  f 
  Memoir 
  New 
  York 
  State 
  Museum, 
  No. 
  14, 
  vols, 
  i 
  and 
  ii, 
  1912. 
  

   X 
  Ibid. 
  § 
  Ibid, 
  pp. 
  320, 
  351, 
  215. 
  

  

  | 
  This 
  Journal, 
  Dec. 
  1904, 
  p. 
  467. 
  

   IT 
  Pal. 
  N. 
  Y. 
  ? 
  vol. 
  viii, 
  pt. 
  II, 
  pi. 
  66, 
  1894. 
  

  

  