﻿838 
  Forty- 
  seventh 
  Report 
  on 
  the 
  State 
  Museum, 
  

  

  family 
  Billingselliile, 
  Schuchert. 
  

   Billingsella,* 
  Hall, 
  1892. 
  

  

  Family 
  Clitambonitid^:, 
  !N". 
  H. 
  Winchell 
  and 
  Schuchert. 
  

  

  Protorthis, 
  Hall, 
  1892. 
  

   Polytoschia, 
  Hall, 
  1892. 
  

   Clitambonites, 
  Pander, 
  1830. 
  

  

  Pronites, 
  Pander, 
  1830. 
  

  

  Gonambonites, 
  Pander, 
  1830. 
  

  

  Hemipronites, 
  Pander, 
  1830. 
  

   Orthisina, 
  d'Orbigny, 
  1847. 
  

   Scenidium, 
  Hall, 
  1860. 
  

  

  rophora, 
  Kayser, 
  1871. 
  

  

  Family 
  STRICEXANDINIIDiE. 
  

   Syntrophia, 
  Hall, 
  1892. 
  | 
  Stricklandinia, 
  Billings, 
  1859. 
  

  

  Family 
  Camarellidje. 
  

  

  Camarella, 
  Billings, 
  1859. 
  

   Parastrophia, 
  Hall, 
  1893. 
  

   Anastrophia, 
  Hall, 
  1879. 
  

  

  Brachymerus, 
  Shaler, 
  1865. 
  

   (?) 
  Branconia, 
  Gagel, 
  1890. 
  

  

  Porambonites, 
  Pander, 
  1830. 
  

   Isorhynchus, 
  King, 
  1850. 
  

   Ncetlingia, 
  Hall, 
  1892. 
  

   Lycophoria, 
  Lahusen, 
  1885. 
  

  

  Family 
  Pentameridje, 
  McCoy. 
  

  

  Conchidium, 
  Linne, 
  1753. 
  

  

  Gypidia, 
  Dalman, 
  1828. 
  

  

  Antirhynchonella, 
  Quenstedt, 
  1871 
  . 
  

  

  Zdimir, 
  Barrande, 
  1879. 
  

   Pentamerus, 
  Sowerby, 
  1813. 
  

   CapeUinia, 
  Hall, 
  1893. 
  

  

  Barrandella, 
  Hall, 
  1893. 
  

   Sieberella, 
  CEhlert, 
  1887. 
  

   Pentamerella, 
  Hall, 
  1867. 
  

   Gypidula, 
  Hall, 
  1867. 
  

   Amphigenia, 
  Hall, 
  1867. 
  

  

  Order 
  TELOTREMATA, 
  Beecher. 
  

  

  Sub-order 
  KOSTRACEA, 
  Schuchert. 
  

  

  Family 
  Rhynchonellidjs, 
  Gray. 
  

  

  Protorhyncha, 
  Hall, 
  1893. 
  

   Orthorhynchula, 
  Hall, 
  1893. 
  

   Rhynchotrema, 
  Hall, 
  1860. 
  

   Rhynchotreta, 
  Hall, 
  1879. 
  

   Stenoschisma, 
  Conrad, 
  1839. 
  

   Camarotoechia, 
  Hall, 
  1893. 
  

   Liorhynchus, 
  Hall, 
  1860. 
  

   Wilsonia, 
  (Quenstedt) 
  Kayser, 
  1871 
  . 
  

   Uncinulus, 
  Bayle, 
  1878. 
  

  

  Uncinulina, 
  Bayle, 
  1878. 
  

   Hypothyris, 
  (McCoy) 
  King, 
  1850. 
  

   Pugnax, 
  Hall, 
  1893. 
  

   Eatonia, 
  HaU, 
  1857. 
  

   Cyclorhina, 
  Hall, 
  1893. 
  

   Terebratuloidea, 
  Waagen, 
  1883. 
  

   Rhynchopora, 
  King, 
  1856. 
  

   Rhynchonella, 
  Fischer 
  de 
  Waldheim, 
  

   1809. 
  

  

  *The 
  genus 
  Billingsella, 
  in 
  correspondence 
  with 
  its 
  early 
  geological 
  age, 
  presents 
  an 
  

   elementary 
  structural 
  aspect 
  indicatingjthat 
  it 
  may 
  have 
  served 
  as 
  a 
  point 
  of 
  departure 
  for 
  the 
  

   Orthid^: 
  and 
  Strophomenid^;. 
  

  

  