﻿8. 
  Welle?' 
  — 
  Succession 
  of 
  Fossil 
  Faunas 
  in 
  Missouri. 
  189 
  

  

  Productus 
  sp. 
  

  

  Sti*aparoUus 
  latus 
  Hall. 
  

  

  Productus 
  sp. 
  

  

  Spirifer 
  sp. 
  

  

  St)vphomena 
  analoga 
  Phillips. 
  

  

  Agaricocrinus 
  planoconveocus 
  Hall. 
  

  

  Spirifer 
  keokuk 
  Hall. 
  

  

  Spirifer 
  suborbicularis 
  Hall. 
  

  

  Derbyia 
  keokuk 
  Hall. 
  

   Orthis 
  swallovi 
  Hall. 
  

   Dichocrinus 
  striatus 
  Owen 
  and 
  Shu- 
  

   mard. 
  

  

  Pleurotomaria 
  montezuma 
  Worthen. 
  

   Syringothyris 
  plenus 
  Hall. 
  

   Platycrinus 
  sp. 
  

  

  Chonetes 
  illinoisensis 
  Worthen. 
  

  

  In 
  the 
  upper 
  bed 
  the 
  fauna 
  is 
  somewhat 
  different. 
  

  

  Spirifer 
  grimesi 
  Hall. 
  

  

  Syringothyris 
  plenus 
  Hall. 
  

  

  Spirifer 
  forbesi 
  Norwood 
  and 
  Pratten. 
  

  

  Spirifer 
  sp. 
  

  

  Terebratula 
  cf. 
  hastata 
  Sowerby. 
  

  

  Athyris 
  lamellosa 
  L'Eveille. 
  

  

  Dichocrinus 
  striatus 
  Owen 
  and 
  Shu- 
  

  

  niard. 
  

   Athyris 
  trinuclea 
  Hall. 
  ? 
  

  

  Spirifer 
  suborbicularis 
  Hall. 
  

  

  Procluctus 
  sp. 
  

  

  Chonetes 
  illinoisensis 
  Worthen. 
  

  

  Orthis 
  swallovi 
  Hall. 
  

  

  Batocrinus 
  pyriformis 
  Shmnard. 
  

  

  Spirifer 
  lineata 
  Martin. 
  

  

  Zaphrentis 
  centralis 
  Worthen. 
  

  

  Platyceras 
  sp. 
  

  

  Productus 
  burlingtonensis 
  Hall. 
  

  

  Spirifer 
  keokuk 
  Hall. 
  ? 
  

  

  Most 
  of 
  the 
  species 
  occurring 
  in 
  this 
  zone 
  are 
  typically 
  

   Burlington 
  forms. 
  A 
  few 
  are 
  limited 
  to 
  this 
  horizon 
  while 
  

   others 
  begin 
  here 
  and 
  only 
  reach 
  their 
  maximum 
  development 
  

   higher 
  up. 
  

  

  Zone 
  III. 
  — 
  In 
  this 
  zone 
  the 
  limestone 
  is 
  very 
  similar 
  to, 
  and 
  

   is 
  a 
  direct 
  continuation 
  of 
  Zone 
  II. 
  At 
  Station 
  2 
  these 
  beds 
  

   are 
  exposed, 
  and 
  their 
  position 
  above 
  Zone 
  II 
  can 
  be 
  readily 
  

   seen. 
  The 
  following 
  fauna 
  was 
  collected. 
  

  

  Syringothyris 
  plenus 
  Hall. 
  

   Spirifer 
  grimesi 
  Hall. 
  

   Orthis 
  swallovi 
  Hall. 
  

   Productus 
  burlingtonensis 
  Hall. 
  

   Orthis 
  burlingtonensis 
  Hall. 
  

  

  Spirifer 
  suborbicularis 
  Hall. 
  

  

  Athyris 
  incrassatus 
  Hall. 
  

  

  Spirifer 
  sp. 
  

  

  Eucladocrinus 
  pleurovimineus 
  White. 
  

  

  At 
  Station 
  14 
  the 
  following 
  species 
  were 
  collected 
  from 
  the 
  

   same 
  zone. 
  

  

  Syringothyris 
  plenus 
  Hall. 
  

   Spirifer 
  grimesi 
  Hall. 
  

   Productus 
  burlingtonensis 
  Hall. 
  

   Athyris 
  incrassatus 
  Hall. 
  

   Spirifer 
  suborbicularis 
  Hall. 
  

   Spirifer 
  sp. 
  

  

  Productus 
  punctatus 
  Martin. 
  

   Spirifer 
  pseudolineata 
  Hall. 
  

  

  At 
  Station 
  13, 
  in 
  beds 
  of 
  the 
  same 
  zone 
  but 
  probably 
  at 
  a. 
  

   little 
  higher 
  horizon, 
  the 
  following 
  fauna 
  was 
  collected. 
  

  

  Orthis 
  swallovi 
  Hall. 
  

   Cladodus 
  sp. 
  

  

  Platyceras 
  quincyense 
  McChesney. 
  

   Athyris 
  lamellosa 
  L'Eveille. 
  

   Terebratula 
  cf. 
  hastata 
  Sowerby. 
  

   Dichocrinus 
  striatus 
  Owen 
  and. 
  Shu- 
  

   mar 
  d. 
  

  

  Syringothyris 
  plenus 
  Hall. 
  

   Chonetes 
  illinoisensis 
  Worthen. 
  

   Orthis 
  swallovi 
  Hall. 
  

   Spirifer 
  grimesi 
  Hall. 
  

   Productus 
  burlingtonensis 
  Hall. 
  

   Athyris 
  incrassatus 
  Hall. 
  

   Orthis 
  burlingtonensis 
  Hall. 
  

  

  Productus 
  setigerus 
  Hall. 
  

   Spirifer 
  sp. 
  

  

  Spirifer 
  suborbicxdaris 
  Hall. 
  

   Metoptoma 
  umbella 
  Meek 
  and 
  Wor- 
  

   then. 
  

   Zaphrentis 
  centralis 
  Worthen. 
  

   Hadrophyllum 
  glans 
  White. 
  

  

  