﻿404 
  O. 
  D. 
  Walcott 
  — 
  Genus 
  Lingulepis. 
  

  

  Art. 
  XL. 
  — 
  Note 
  on 
  the 
  Genus 
  Lingulepis 
  : 
  by 
  

   Charles 
  D. 
  Walcott. 
  

  

  Lingulepis, 
  Hall. 
  

  

  Lingulepis, 
  Hall, 
  1863. 
  Sixteenth 
  Ann. 
  Rep. 
  N. 
  Y. 
  State 
  Cab. 
  

  

  Nat. 
  Hist., 
  p. 
  129. 
  

   Lingulepis, 
  Meek 
  and 
  Hayden, 
  1864. 
  Pal. 
  Upper 
  Missouri, 
  Pt. 
  

  

  I, 
  p. 
  1. 
  

   Lingulepis, 
  Hall, 
  1867. 
  Trans. 
  Albany 
  Institute, 
  vol. 
  v, 
  p. 
  106. 
  

   Lingulepis, 
  Hall 
  and 
  Clarke, 
  1892. 
  Eleventh 
  Ann. 
  Rep. 
  State 
  

  

  Geologist, 
  New 
  York. 
  (Author's 
  Ed.) 
  p. 
  231, 
  pi. 
  1, 
  

  

  nsrs. 
  16, 
  17. 
  

   Lingulepis, 
  Hall 
  and 
  Clarke, 
  1892. 
  Pal. 
  New 
  York, 
  vol. 
  viii, 
  

  

  Pt. 
  1, 
  pp. 
  59, 
  163. 
  

   Type, 
  Lingula 
  acuminata, 
  Conrad 
  sp. 
  — 
  Lingula 
  pinniformis, 
  

  

  Owen. 
  

  

  A 
  comparison 
  of 
  a 
  series 
  of 
  specimens 
  of 
  Lingulepis 
  

   acuminata 
  from 
  the 
  Potsdam 
  terrane 
  and 
  the 
  base 
  of 
  the 
  

   Calciferous 
  formation 
  of 
  Saratoga, 
  Washington, 
  Franklin, 
  and 
  

   Jefferson 
  counties, 
  New 
  York, 
  and 
  from 
  the 
  same 
  horizons 
  in 
  

   Ontario, 
  Canada, 
  with 
  a 
  large 
  series 
  of 
  specimens 
  from 
  the 
  St. 
  

   Croix 
  sandstone 
  of 
  Wisconsin, 
  leads 
  to 
  the 
  conclusion 
  that 
  

   Lingulepis 
  pinniformis 
  is 
  a 
  synonym 
  of 
  Lingulepis 
  acumi- 
  

   nata. 
  This 
  makes 
  Lingulepis 
  acuminata 
  the 
  type 
  of 
  the 
  

   genus 
  Lingulepis, 
  the 
  original 
  description 
  of 
  the 
  genus 
  beings 
  

   based 
  upon 
  specimens 
  from 
  the 
  St. 
  Croix 
  sandstone 
  of 
  Wis- 
  

   consin. 
  

  

  The 
  further 
  study 
  of 
  the 
  types 
  of 
  the 
  species 
  that 
  have 
  been 
  

   referred 
  to 
  the 
  genus 
  Lingulepis 
  results 
  in 
  the 
  elimination 
  of 
  

   all 
  of 
  them 
  from 
  the 
  genus 
  with 
  the 
  exception 
  of 
  Lingulepis 
  

   acuminata 
  and 
  Lingulepis 
  meeki. 
  

  

  The 
  species 
  that 
  have 
  been 
  referred 
  to 
  Lingulepis 
  heretofore 
  

   are 
  now 
  referred 
  as 
  follows 
  : 
  

  

  Lingulepis 
  dahotensis, 
  M. 
  and 
  H. 
  — 
  Lingulepis 
  acuminata. 
  

   Lingulepis 
  pinniformis, 
  Owen. 
  — 
  Lingulepis 
  acuminata. 
  

   Lingulepis 
  minima, 
  Whitfield. 
  — 
  Lingulepis 
  acuminata. 
  

   Lingulepis 
  perattenuata, 
  Whitfield. 
  — 
  Lingulella 
  perattenuata. 
  

   Lingulepis 
  cuneolus, 
  Whitfield. 
  — 
  Lingulella 
  cuneolus. 
  

   Lingulepis 
  ella, 
  H. 
  and 
  W. 
  — 
  Lingulella 
  ella. 
  

   Lingulepis 
  matinalis, 
  Hall. 
  — 
  Lingulella 
  f 
  matinalis. 
  

   Lingulepis 
  mcera, 
  H. 
  and 
  W 
  ' 
  .—Lingulella 
  f 
  mcera. 
  

   Lingulepis 
  f 
  minuta, 
  H. 
  and 
  W. 
  — 
  Obolella 
  f 
  minuta. 
  

   Lingulepis 
  morsensis, 
  Winchell 
  (Miller) 
  — 
  Lingula 
  morsii. 
  

   Lingulepis 
  prima, 
  M. 
  and 
  H. 
  — 
  JDicellomus 
  polita. 
  

  

  