﻿330 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  380- 
  

   385 
  

  

  Beginning 
  of 
  recorded 
  section. 
  

   Shales 
  as 
  above. 
  

  

  Thin 
  limestone 
  with 
  fragments 
  of 
  crinoids 
  and 
  bryozoa. 
  

  

  386 
  

  

  Compact, 
  heavy-bedded, 
  blue-black 
  shales 
  with 
  greasy 
  feel 
  

   when 
  fresh, 
  breaking 
  across 
  the 
  lines 
  of 
  sedimentation. 
  

   On 
  weathering 
  it 
  becomes 
  blue-gray 
  and 
  crumbles 
  rapidly 
  

   to 
  fine, 
  irregular, 
  trihedral 
  or 
  columnar 
  pieces. 
  The 
  fossils 
  

   are 
  scattered 
  uniformly 
  throughout 
  the 
  mass 
  and 
  do 
  not 
  

   occur 
  in 
  distinct 
  horizons. 
  

  

  Of 
  the 
  Trilobites, 
  Cryphoeus 
  Boothi 
  is 
  very 
  abundant, 
  

   Homalonotus 
  DeKayi 
  is 
  on 
  the 
  decrease 
  and 
  Phacops 
  rana 
  

   is 
  quite 
  rare, 
  especially 
  toward 
  the 
  lower 
  part 
  of 
  the 
  shales. 
  

  

  Cephalopods: 
  Orthoceras 
  emaceratum 
  abundant; 
  Gyro- 
  

   ceras 
  liratum 
  occasionally; 
  a 
  Nautilus, 
  probably 
  JST. 
  Hyatti 
  

   and 
  Goniatites 
  uniangularis 
  . 
  

  

  Gastropods: 
  Rare, 
  with 
  the 
  exception 
  of 
  Platyceras 
  sub- 
  

   rectum. 
  Other 
  species 
  observed 
  are 
  Platyceras 
  bucculentum, 
  

   Biaphorostoma, 
  lineatum, 
  Pleurotomaria 
  capillaria, 
  P. 
  trilix, 
  

   P. 
  rugulata, 
  Bellerophon 
  Leda, 
  B. 
  patulus. 
  

  

  Lamellibranchs: 
  Actinopteria 
  decussata 
  predominant; 
  

   Glyplodesma 
  erectum 
  very 
  common. 
  Other 
  species 
  are 
  Liop- 
  

   teria 
  Conradi, 
  Nucula 
  bellistriata, 
  Tellinopsis 
  subemarginata 
  

   and 
  Pterinopecten 
  undosus. 
  

  

  Brachiopods: 
  The 
  horizon 
  is 
  marked 
  by 
  the 
  great 
  abund- 
  

   ance 
  of 
  species 
  of 
  Bingula, 
  occurring 
  for 
  the 
  most 
  part 
  below 
  

   400 
  ft., 
  viz.: 
  L. 
  sp.f 
  (like 
  densa), 
  L. 
  punctata, 
  Bignomia 
  

   alveata, 
  L. 
  cf. 
  complanata 
  and 
  two 
  additional 
  species 
  proba- 
  

   bly 
  new. 
  Of 
  other 
  brachiopods 
  Spirifer 
  audaculus, 
  S. 
  Jim- 
  

   briatus 
  and 
  Orthothetes 
  arctostriata 
  are 
  common. 
  Iro- 
  

   pidoleptus 
  carinatus 
  very 
  abundant. 
  Other 
  species, 
  with 
  

   exception 
  of 
  Ghonetes 
  scitula, 
  G. 
  deflecta, 
  G. 
  lepida 
  and 
  Spirifer 
  

   mucronatus, 
  are 
  not 
  frequent. 
  

  

  Bryozoa: 
  Fenestelloids 
  rare; 
  Taeniopora 
  exigua, 
  Sticto- 
  

   pora 
  incisurata, 
  Hederella 
  Canadensis 
  not 
  uncommon. 
  

  

  Corals: 
  Pleurodictyum 
  stylopora; 
  no 
  other 
  favositoids; 
  

   no 
  cyathophylloids. 
  

  

  