﻿Report 
  of 
  the 
  State 
  Geologist. 
  

  

  837 
  

  

  Family 
  Orthid^e, 
  Woodward 
  

  

  Orthis, 
  Dalman, 
  1828. 
  

  

  Orthambonites, 
  Pander, 
  1830. 
  

   Plectorthis, 
  HaU, 
  1892. 
  

  

  Dinorthis, 
  Hall, 
  1892. 
  

   Plsesiomys, 
  HaU, 
  1892. 
  

   Hebertella, 
  Hall, 
  1892. 
  

   Orthostrophia, 
  HaU, 
  1883. 
  

   Platystrophia, 
  King, 
  1850. 
  

   Heterorthis, 
  Hall, 
  1892. 
  

  

  BUobites, 
  Linne, 
  1775. 
  

  

  Dicoelosia, 
  King, 
  1850. 
  

   DalmaneUa, 
  HaU, 
  1892. 
  

   RhipidomeUa, 
  CEhlert, 
  1880. 
  

  

  Rhipidomys, 
  CEhlert, 
  1887. 
  

   Schizophoria, 
  King, 
  1850. 
  

   Orthotichia, 
  HaU, 
  1892, 
  

   Enteletes, 
  Fischer 
  de 
  Waldheini, 
  1830, 
  

  

  SyntrieJasma, 
  Meek, 
  1865. 
  

  

  Family 
  Steophomextdje, 
  King 
  

  

  Orthidium, 
  Hall, 
  1892. 
  

   Strophomena, 
  Rafinesque 
  (de 
  Blain- 
  

  

  viUe), 
  1825. 
  

   Orthothetes, 
  Fischer 
  de 
  Waldheim, 
  

  

  1830. 
  

   Hipparionyx, 
  Vanuxem, 
  1842. 
  

   KaysereUa, 
  HaU, 
  1892. 
  

  

  Derbya, 
  Waagen, 
  1884. 
  

   Meekella, 
  White 
  & 
  St. 
  John, 
  1868. 
  

   Streptorhynchus, 
  King, 
  1872. 
  

   Triplecia, 
  HaU, 
  1858. 
  

  

  Dicraniscus, 
  Meek, 
  1872. 
  

   Mimulus, 
  Barrande, 
  1879. 
  

   Streptis, 
  Davidson, 
  1881. 
  

  

  Family 
  Lept^exidje. 
  

  

  Leptasna, 
  Dahnan, 
  1828. 
  

  

  Leptagonia, 
  McCoy, 
  1844. 
  

   Rafinesquina, 
  HaU, 
  1892. 
  

   Stropheodonta, 
  Hall, 
  1852. 
  

   Brachy 
  prion, 
  Shaler, 
  1865. 
  

   DouvilJina. 
  CEhlert, 
  1887. 
  

   Leptcstrophia, 
  HaU, 
  1892. 
  

   Phohdostrophia, 
  HaU, 
  1892. 
  

  

  StrophoneUa, 
  HaU, 
  1879. 
  

   Amphistrohpia, 
  Hall, 
  1892. 
  

   LepteUa, 
  HaU, 
  1892. 
  

   Plectanibonites, 
  Pander, 
  1830. 
  

   Christiania, 
  Hall, 
  1892. 
  

   Lepteenisca, 
  Beecher, 
  1890. 
  

   Davidsonia, 
  Bouchard, 
  1847. 
  

  

  Chonetes, 
  Fischer 
  de 
  Waldheim, 
  1837 
  

   AnopUa, 
  HaU, 
  1892. 
  

   ChoneteUa, 
  Waagen, 
  1884. 
  

  

  Family 
  Chonethxe. 
  

  

  Chonetina, 
  Krotow, 
  1888. 
  

   Chonostrophia. 
  Hall, 
  1892. 
  

   Chonopectus, 
  Hall, 
  1892. 
  

  

  Strophalosia, 
  King, 
  1844. 
  

  

  Orthothrix, 
  Geinitz, 
  1847. 
  

  

  Leptcenalosia, 
  King, 
  1845. 
  

   DavieseUa, 
  Waagen, 
  1884. 
  

   Aulosteges, 
  von 
  Helmersen, 
  1847. 
  

  

  Family 
  PRODrcTiD^:, 
  Gray. 
  

  

  ProducteUa, 
  HaU, 
  1867. 
  

   ! 
  Productus, 
  HaU, 
  1867. 
  

   Marginifera, 
  Waagen, 
  1884. 
  

   ProboscideUa, 
  CEhlert, 
  1887, 
  

   Etheridgina, 
  CEhlert, 
  1887. 
  

  

  Family 
  Thecidiid^:. 
  

   Lyttonia, 
  Waagen, 
  1883. 
  | 
  Oldhaniina, 
  Waagen, 
  1883. 
  

  

  Family 
  Kichthofeniid^:, 
  Waagen. 
  

   Richthofenia, 
  Waagen, 
  1883. 
  

  

  