﻿Vol. 
  53-] 
  

  

  FAUNA 
  OF 
  THE 
  KEISLEr 
  LIMESTONE. 
  

  

  holm 
  Limestone, 
  and 
  he 
  regards 
  them 
  as 
  formed 
  at 
  the 
  same 
  time 
  

   in 
  the 
  same 
  ocean. 
  To 
  support 
  this 
  view 
  he 
  quotes 
  a 
  list 
  of 
  

   identical 
  fossils 
  from 
  the 
  same 
  bed, 
  amongst 
  which 
  we 
  notice 
  

   several 
  species 
  which 
  are 
  not 
  found 
  on 
  higher 
  or 
  lower 
  horizons 
  

   in 
  those 
  districts. 
  It 
  is 
  on 
  this 
  occurrence 
  of 
  peculiar 
  species 
  of 
  

   very 
  limited 
  vertical 
  range 
  that 
  we 
  must 
  depend 
  for 
  the 
  correlation 
  

   of 
  beds 
  in 
  distant 
  lands, 
  as 
  is 
  notoriously 
  exemplified 
  by 
  the 
  grap- 
  

   tolites 
  and 
  Ammonoidea. 
  

  

  The 
  homotaxial 
  equivalence 
  of 
  the 
  Keisley 
  Limestone 
  with 
  that 
  

   of 
  Kildare 
  is 
  practically 
  proved 
  by 
  the 
  occurrence 
  in 
  both 
  of 
  the 
  

   following 
  species 
  (List 
  I.), 
  which 
  are 
  unknown 
  from 
  any 
  other 
  beds 
  

   in 
  the 
  British 
  Isles. 
  The 
  presence 
  also 
  of 
  the 
  many 
  common 
  

   species 
  (enumerated 
  in 
  List 
  II.) 
  in 
  these 
  two 
  limestones 
  strongly 
  

   supports 
  this 
  conclusion. 
  

  

  List 
  I. 
  

  

  Cyphoniscus 
  socialis. 
  

   Cyphaspis 
  ( 
  Tomquistia) 
  Nicholsoni. 
  

   Cheirurus 
  cancrurus. 
  

   isis. 
  

  

  „ 
  (JPseudosphcerexochus) 
  con- 
  

   formis. 
  

   ? 
  ,, 
  ( 
  ,, 
  ) 
  subquadratus. 
  

  

  Sphcerexochus 
  latirugatus. 
  

   ? 
  Sphcerocoryphe 
  granulata. 
  

   Lichas 
  bulbiceps. 
  

   ? 
  „ 
  bifurcatus. 
  

   Tiresias 
  insculptus. 
  

  

  Homalonotus 
  punctiUosus. 
  

  

  lllcenusfallax. 
  

  

  ? 
  ,, 
  Roemeri. 
  

  

  Harpe* 
  Wegelini. 
  

   Cythere 
  Wrightiana. 
  

   Atrypa 
  expansa. 
  

   Fenestella 
  assimilis. 
  

   Loxonema 
  striatissimum. 
  

   Cyclonema 
  rupestre. 
  

   „ 
  sulci 
  ferum. 
  

  

  List 
  II. 
  

  

  Eafinesquina 
  expansa. 
  

   Strophomena 
  comcgatella. 
  

  

  ,, 
  antiquata. 
  

  

  Leptcena 
  rhomboidalis. 
  

   Vlectambonites 
  quinquecostata. 
  

   ? 
  „ 
  trans 
  ver 
  salts. 
  

  

  Christiania 
  tenuicincta. 
  

   Streptis 
  monilifera. 
  

   Triplecia 
  insiilaris. 
  

   Hyattella 
  Portlockiana. 
  

   ? 
  Ptilodictya 
  recta. 
  

   ? 
  Euomphalus 
  subsulcatus. 
  

   Holopea 
  concinna. 
  

   Conularia, 
  sp. 
  

   Sphceronites 
  pyriformis. 
  

   Fa,vosites 
  alveolaris. 
  

   Stenopora 
  fibrosa. 
  

  

  catenularia. 
  

  

  Cheirurus 
  bimucronatus. 
  

   ? 
  „ 
  clavifrons 
  ? 
  

   Sphcerexochus 
  mirus. 
  

   Staurocephalus 
  Murchisoni. 
  

   Lichas 
  laxatus. 
  

  

  ,, 
  hibernicus. 
  

   Illcenus 
  Bowmani. 
  

   Remop 
  le 
  urides 
  longicostat 
  us. 
  

   Primitia 
  M'Coyi. 
  

   Atrypa 
  marginalis. 
  

   Orthis 
  Actonice. 
  

   ? 
  ,, 
  altemata. 
  

  

  ,, 
  biforata. 
  

  

  „ 
  calligramma. 
  

  

  „ 
  flabellulum. 
  

   ? 
  ,, 
  testudinaria. 
  

  

  „ 
  Vt 
  

  

  Eafinesquina 
  

  

  Turning 
  now 
  to 
  the 
  Zepfreraa-Limestone 
  of 
  Dalecarlia 
  we 
  see 
  

   that 
  the 
  following 
  species, 
  peculiar 
  to 
  that 
  rock 
  in 
  Sweden, 
  occur 
  

   at 
  Keisley. 
  Those 
  marked 
  with 
  an 
  asterisk 
  are 
  doubtful 
  at 
  Keisley. 
  

  

  Cheirurus 
  glaber. 
  

  

  Lichas 
  conformis 
  (var. 
  at 
  Keisley). 
  

   *Harpes 
  costatus. 
  

  

  Wegelini. 
  

   Homalonotus 
  punctiUosus. 
  

   * 
  Euomphalus 
  nitidulus. 
  

  

  Q. 
  J. 
  ii. 
  S. 
  No. 
  209. 
  

  

  Euomphalus 
  obtusangulus. 
  

   Eunema 
  carinatum. 
  

   : 
  Orthis 
  conferta. 
  

   JJayia 
  pentagonalis. 
  

   Atrypa 
  expansa 
  

  

  