﻿"Vol. 
  53.] 
  THE 
  FAUNA 
  OF 
  THE 
  KEISLEY 
  LIMESTONE. 
  67 
  

  

  5. 
  The 
  Fauna 
  of 
  the 
  Keisley 
  Limestone. 
  — 
  Part 
  II. 
  Conclusion. 
  1 
  

   By 
  F. 
  R. 
  Cowpee 
  Reed, 
  Esq., 
  M.A., 
  F.G.S. 
  (Read 
  November 
  

   18th, 
  1896.) 
  

  

  [Plate 
  VI.] 
  

  

  OSTRACODA. 
  

  

  Of 
  the 
  rich 
  fauna 
  of 
  ostracods 
  which 
  Prof. 
  T. 
  Rupert 
  Jones 
  2 
  has 
  

   described 
  from 
  Kildare 
  I 
  have, 
  after 
  careful 
  search, 
  been 
  able 
  to 
  

   determine 
  only 
  the 
  following 
  two 
  at 
  Keisley 
  : 
  — 
  

  

  Peimitia 
  M'Coyi, 
  Salter. 
  

  

  This 
  is 
  the 
  form 
  which 
  many 
  previous 
  observers 
  have 
  recorded 
  

   as 
  Cy 
  there 
  phaseolus 
  (His.), 
  but 
  it 
  is 
  a 
  mistaken 
  identification, 
  

   as 
  Prof. 
  Rupert 
  Jones 
  (loc. 
  cit.) 
  has 
  shown. 
  The 
  species 
  is 
  as 
  

   abundant 
  at 
  Keisley 
  as 
  it 
  is 
  at 
  Kildare. 
  

  

  Cytheee 
  Weightiana, 
  Jones. 
  

  

  This 
  is 
  a 
  rare 
  form 
  at 
  Keisley, 
  only 
  two 
  or 
  three 
  specimens 
  

   having 
  so 
  far 
  been 
  found. 
  

  

  BRACHIOPODA. 
  

  

  Obolella 
  cf. 
  nitens, 
  Hisinger. 
  

  

  A 
  small 
  transversely-oval 
  shell, 
  with 
  a 
  longitudinal 
  groove 
  from 
  

   the 
  beak 
  to 
  the 
  anterior 
  margin, 
  appears 
  to 
  belong 
  to 
  this 
  Swedish 
  

   species. 
  3 
  The 
  shell 
  is 
  very 
  thin, 
  and 
  marked 
  with 
  only 
  a 
  few 
  con- 
  

   centric 
  lines 
  of 
  growth 
  ; 
  the 
  brachial 
  valve, 
  which 
  here 
  is 
  alone 
  

   preserved, 
  is 
  much 
  flattened, 
  has 
  a 
  small 
  pointed 
  beak 
  near 
  the 
  

   margin, 
  an 
  almost 
  straight 
  hinge-line, 
  and 
  a 
  distinct 
  longitudinal 
  

   groove 
  running 
  from 
  the 
  beak 
  to 
  the 
  front 
  edge. 
  The 
  brachial 
  valve 
  

   of 
  this 
  species 
  figured 
  by 
  Lindstrom 
  4 
  corresponds 
  very 
  closely 
  in 
  

   shape 
  and 
  other 
  characters 
  with 
  our 
  Keisley 
  specimen, 
  but 
  the 
  

   pedicle-valves 
  there 
  delineated 
  are 
  subcircular, 
  and 
  described 
  as 
  

   shield-shaped, 
  though 
  the 
  breadth 
  is 
  given 
  as 
  twice 
  the 
  length. 
  

   The 
  species 
  is 
  found 
  in 
  the 
  Trinucleiis-schists 
  of 
  Sweden. 
  Our 
  

   specimen 
  measures 
  2 
  millim. 
  in 
  length 
  and 
  3 
  in 
  breadth. 
  

  

  Oebiculoidea, 
  sp. 
  

  

  A 
  small 
  circular 
  pedicle-valve, 
  ornamented 
  with 
  rather 
  coarse 
  

   -concentric 
  striae, 
  and 
  possessing 
  a 
  central 
  elevated 
  umbo 
  whence 
  a 
  

   narrow 
  external 
  pedicJe-groove 
  is 
  traceable 
  to 
  the 
  margin, 
  is 
  the 
  only 
  

   representative 
  of 
  the 
  genus 
  that 
  I 
  have 
  seen 
  from 
  this 
  rock. 
  The 
  

   specimen 
  is 
  in 
  the 
  Woodwardian 
  Museum. 
  

  

  1 
  For 
  Part 
  I., 
  see 
  this 
  Journal, 
  vol. 
  lii. 
  (1896) 
  pp. 
  407-437 
  & 
  pis. 
  xx.-xxi. 
  

  

  2 
  Ann. 
  Mag. 
  Nat. 
  Hist. 
  ser. 
  4, 
  vol. 
  ii. 
  (1868) 
  p. 
  54, 
  pi. 
  vii. 
  

  

  3 
  Hisinger, 
  ' 
  Lethaea 
  Suecica,' 
  Stockholm, 
  1837, 
  p. 
  77 
  (Atrypa? 
  nitens). 
  

   * 
  ' 
  Fragm. 
  Silur.' 
  (1880) 
  pi. 
  xiii. 
  fig. 
  34. 
  

  

  p2 
  

  

  