﻿328 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum, 
  

  

  "\ 
  

  

  as 
  it 
  has 
  been 
  possible 
  to 
  ascertain 
  from 
  an 
  examination 
  of 
  the 
  

   material 
  collected 
  from 
  the 
  dump 
  already 
  accumulated 
  at 
  the 
  

   time 
  the 
  systematic 
  operations 
  were 
  begun. 
  This 
  has 
  afforded 
  

   but 
  little 
  evidence 
  in 
  regard 
  to 
  the 
  fauna 
  of 
  the 
  Portage 
  and 
  

   Genesee 
  shales, 
  which 
  were 
  the 
  rocks^first 
  to 
  be 
  excavated, 
  and, 
  

   therefore, 
  the 
  most 
  deeply 
  buried 
  under 
  the 
  succeeding 
  debris. 
  

  

  The 
  upper 
  shales 
  of 
  the 
  Hamilton 
  group, 
  to 
  the 
  beginning 
  of 
  

   the 
  recorded 
  section, 
  have 
  furnished 
  many 
  fossils, 
  and 
  these 
  are 
  

   here 
  registered 
  as 
  a 
  preliminary 
  to 
  the 
  detailed 
  section. 
  

  

  Fauna 
  of 
  the 
  Hamilton 
  shales 
  from 
  the 
  base 
  of 
  the 
  Genesee 
  

   shales, 
  at 
  225 
  feet 
  to 
  a 
  depth 
  of 
  385 
  feet. 
  Rocks 
  soft, 
  com- 
  

   pact, 
  bluish 
  shale, 
  crumbling 
  rapidly 
  on 
  exposure, 
  with 
  

   occasional 
  thin 
  calcareous 
  layers.* 
  

  

  Abundant 
  and 
  characteristic. 
  

   Phacops 
  rana, 
  

   Cryphseus 
  Boothi, 
  

   Homalonotus 
  De 
  Kayi, 
  

   Glyptodesma 
  erectum, 
  

   Ambocoelia 
  umbonata, 
  

   Lingula 
  punctata. 
  

  

  Common. 
  

  

  Diaphorostoma 
  lineatum, 
  

   Aviculopecten 
  princeps, 
  

   A. 
  scabridus, 
  

  

  Actinopteria 
  decussata, 
  

   Grammysia 
  arcuata, 
  

   Spirif 
  er 
  mucronatus, 
  

   S. 
  audaculus, 
  

  

  Chonetes 
  scitula, 
  

   Dignomia 
  alveata, 
  

   Streptelasma 
  rectum, 
  

   Pleurodictyum 
  stylopora, 
  

   Polypora 
  multiplex, 
  

   Stictopora 
  incisurata. 
  

  

  Occasional. 
  

  

  Proetus 
  macrocephalus, 
  

   Orthoceras 
  nuntium, 
  

   Tentaculites 
  bellulus, 
  

   Styliolina 
  fissurella, 
  

   Platyceras 
  subrectum, 
  

   P 
  . 
  sy 
  mmetricum 
  , 
  

  

  Occasional 
  — 
  (Continued). 
  

   Aviculopecten 
  exacutus, 
  

   Pterinopecten 
  undosus, 
  

   Lyriopecten 
  orbiculatus, 
  

   Grammysia 
  alveata, 
  

   G. 
  bisulcata, 
  

  

  Palseoneilo 
  tenuistriata, 
  

   P. 
  fecunda, 
  

  

  P. 
  plana, 
  

  

  Stropheodonta 
  junia, 
  

   S. 
  insequistriata, 
  

  

  Orthothetes 
  arctostriata, 
  

   Productella 
  spinulicosta, 
  

   Spirif 
  er 
  Marcyi, 
  

   Atrypa 
  spinosa, 
  

   Liorhynchus 
  quadricostata, 
  

   Modiomorpha 
  concentrica, 
  

   Goniophora 
  angulata, 
  

   Cypricardinia 
  indenta, 
  

   Tellinopsis 
  subemarginata, 
  

   Orthonota 
  undulata, 
  

   O. 
  parvuia, 
  

  

  Microdon 
  tenuistriatus, 
  

   Prothyris 
  lanceolatus, 
  

   Atrypa 
  reticularis, 
  

   Athyris 
  spirif 
  eroides, 
  

   Spirif 
  er 
  sculptilis, 
  

   Tropidoleptus 
  carinatus, 
  

   Stropheodonta 
  perplana, 
  

  

  * 
  This 
  list 
  was 
  communicated 
  by 
  the 
  writer 
  at 
  page 
  326 
  of 
  the 
  Report 
  of 
  the 
  State 
  Geologist 
  

   or 
  1891 
  Cpublished 
  1893). 
  

  

  