﻿78 
  MR. 
  P. 
  R. 
  COWPER 
  REED 
  ON 
  THE 
  [Feb. 
  1 
  897, 
  

  

  Gasteropoda. 
  

   Loxoistema 
  striatissimtjm, 
  Salter 
  MS. 
  (PL 
  VI. 
  fig. 
  6.) 
  

  

  Shell 
  elongate, 
  tunica.] 
  ate, 
  consisting 
  of 
  nine 
  or 
  ten 
  wborls. 
  

   Apical 
  angle 
  about 
  20°. 
  Whorls 
  ventricose, 
  about 
  twice 
  as 
  broad 
  

   as 
  long, 
  the 
  successive 
  whorls 
  regularly 
  decreasing 
  in 
  size 
  towards 
  

   the 
  apex 
  by 
  one-third 
  of 
  their 
  length 
  and 
  breadth. 
  Upper 
  whorls 
  

   constricted 
  just 
  below 
  the 
  suture. 
  The 
  suture-line 
  crosses 
  the 
  axis 
  

   of 
  the 
  shell 
  at 
  an 
  angle 
  of 
  about 
  70°. 
  Surface 
  of 
  shell 
  ornamented 
  

   with 
  fine 
  longitudinal 
  curved 
  lines. 
  

  

  There 
  are 
  specimens 
  of 
  this 
  shell 
  from 
  the 
  Kildare 
  Limestone, 
  

   and 
  it 
  is 
  one 
  of 
  these 
  in 
  the 
  Jermyn 
  Street 
  Museum 
  which 
  bears 
  

   the 
  MS. 
  name 
  L. 
  striatissimum. 
  It 
  was 
  probably 
  given 
  by 
  Salter. 
  

   L. 
  sinuosum 
  (Sowerby) 
  1 
  is 
  a 
  closely- 
  allied 
  species, 
  and 
  so 
  is 
  

   L. 
  intumescens 
  (Lindstrom), 
  2 
  but 
  they 
  possess 
  strongly-bent 
  striae 
  

   on 
  the 
  whorls. 
  L. 
  dalecaricum 
  (Lindstrom), 
  3 
  of 
  the 
  Leptcena- 
  

   Limestone, 
  has 
  whorls 
  too 
  globose 
  and 
  short 
  to 
  be 
  considered 
  

   identical 
  with 
  the 
  Keisley 
  form. 
  

  

  Holopea 
  concinna, 
  M'Coy. 
  

  

  This 
  species 
  is 
  found 
  at 
  Keisley, 
  and 
  is 
  said 
  to 
  be 
  very 
  abundant 
  

   at 
  the 
  Chair 
  of 
  Kildare. 
  4 
  There 
  are 
  specimens 
  of 
  it 
  from 
  the 
  latter 
  

   locality 
  in 
  Sir 
  R. 
  Griffith's 
  Collection 
  in 
  the 
  Dublin 
  Museum. 
  

  

  Holopea 
  striate 
  ll 
  a, 
  Sowerby. 
  

  

  Casts 
  of 
  this 
  species 
  are 
  not 
  uncommon 
  at 
  Keisley. 
  I 
  have 
  been 
  

   unable 
  to 
  assign 
  to 
  it 
  definitely 
  any 
  specimens 
  from 
  Kildare. 
  

  

  CXCLONEMA 
  RTTPESTRE, 
  Eichwald. 
  

  

  This 
  species 
  is 
  found 
  at 
  Kildare, 
  and 
  I 
  have 
  seen 
  a 
  portion 
  of 
  a 
  

   single 
  shell 
  from 
  Keisley 
  in 
  the 
  Carlisle 
  Museum, 
  where 
  it 
  was 
  

   labelled 
  Holopea 
  concinna. 
  It 
  is 
  not 
  recorded 
  from 
  the 
  Leptcena- 
  

   Limestone, 
  but 
  Schmidt 
  5 
  gives 
  it 
  as 
  Trochus 
  rupestris 
  in 
  his 
  list 
  

   of 
  fossils 
  from 
  the 
  Lyckholm-bed 
  (Stage 
  E). 
  

  

  Cyclonema 
  stjlcieerum, 
  Eichw. 
  

  

  Of 
  this 
  shell 
  I 
  have 
  seen 
  only 
  one 
  imperfect 
  specimen 
  from 
  

   Keisley. 
  It 
  occurs 
  in 
  the 
  Kildare 
  Limestone, 
  and 
  in 
  the 
  Orihoceras- 
  

   Limestone 
  of 
  Esthonia. 
  

  

  Eiwema 
  carikatum, 
  Lindstrom, 
  var. 
  

  

  The 
  only 
  point 
  of 
  difference 
  between 
  a 
  specimen 
  from 
  Keisley 
  

   and 
  that 
  figured 
  by 
  Lindstrom 
  6 
  from 
  the 
  Lejptcena- 
  Limestone 
  is 
  

  

  1 
  ( 
  Sil. 
  Syst.' 
  pt. 
  i. 
  (1839) 
  p. 
  619, 
  pi. 
  viii. 
  fig. 
  15 
  (Terebra). 
  

  

  2 
  ' 
  Sil. 
  G-astrop., 
  etc. 
  Grotland,' 
  K. 
  Svensk. 
  Vetensk. 
  Akad. 
  Handl. 
  vol. 
  xix. 
  

   (1884) 
  no. 
  6, 
  p. 
  148, 
  pi. 
  xv. 
  fig. 
  6. 
  

  

  3 
  ' 
  Fragm. 
  Silur.' 
  (1880) 
  p. 
  14, 
  pi. 
  xv. 
  fig. 
  19. 
  

  

  4 
  M'Coy, 
  ' 
  Syn. 
  Sil. 
  Foss. 
  Irel.' 
  Dublin, 
  1846, 
  p. 
  13, 
  pi. 
  i. 
  fig. 
  10. 
  

  

  5 
  'Ber. 
  ostbalt. 
  silur. 
  Trilob.,' 
  pt. 
  i. 
  Mem. 
  Acad. 
  Imper. 
  d. 
  Sci. 
  St. 
  Peters- 
  

   burg, 
  ser. 
  7, 
  vol. 
  xxx. 
  (1881) 
  no. 
  1, 
  p. 
  38. 
  

  

  6 
  Op. 
  jam 
  cit. 
  p. 
  14, 
  pi. 
  xv. 
  fig. 
  20. 
  

  

  