﻿538 
  

  

  ME. 
  F. 
  K. 
  COWPER 
  HEED 
  ON 
  THE 
  FOSSILS 
  OF 
  [DeC. 
  1 
  897, 
  

  

  Staurocephalus-, 
  Chair 
  of 
  Kildare, 
  and 
  Keisley 
  Limestones, 
  and 
  espe- 
  

   cially 
  with 
  the 
  Sholeshook 
  Limestone 
  of 
  South 
  Wales, 
  than 
  with 
  the 
  

   typical 
  Middle 
  Eala. 
  So 
  that, 
  on 
  the 
  whole, 
  its 
  horizon 
  may 
  be 
  with 
  

   much 
  probability 
  considered 
  to 
  lie 
  near 
  the 
  base 
  of 
  the 
  Upper 
  Bala. 
  

  

  (b) 
  Fossils 
  from 
  the 
  Limestone-bands 
  immediately 
  beneath 
  

   the 
  Compact 
  Limestone 
  from 
  which 
  the 
  preceding 
  were 
  

   obtained. 
  

  

  The 
  whole 
  fauna 
  appears 
  to 
  consist 
  of 
  corals, 
  most 
  of 
  which 
  are 
  

   in 
  an 
  inferior 
  state 
  of 
  preservation. 
  

  

  Favosites 
  aspera, 
  d'Orb. 
  

   Halysites 
  cf. 
  escharoides, 
  Lam. 
  

  

  catenularia, 
  Linn. 
  

  

  Heliolites 
  megastoma, 
  M'Coy. 
  

  

  sp. 
  

  

  Lindstroemia 
  subduplicata, 
  M'Coy 
  

  

  Cybele 
  sp. 
  

   The 
  Middle 
  Bala 
  facies 
  is 
  obvious. 
  

  

  Lindstroemia 
  sp. 
  

   Stenopora 
  fibrosa, 
  Groldf. 
  

   Streptelasma 
  europceum, 
  Rbtn. 
  ? 
  

  

  Cybele 
  sp. 
  ? 
  

  

  Lichas 
  laxatus, 
  M'Coy. 
  

   Phacops 
  Brongniarti, 
  Portl. 
  

   Trinucleus 
  seticornis, 
  var. 
  portrainensis 
  

   nov. 
  

  

  (c) 
  Fossils 
  from 
  the 
  Grey 
  Shales 
  marked 
  in 
  the 
  Map 
  as 
  

   Trilobite- 
  Shales. 
  

  

  These 
  fossils 
  are 
  poorly 
  preserved. 
  By 
  far 
  the 
  most 
  abundant 
  

   form 
  is 
  Trinucleus 
  seticornis, 
  var. 
  portrainensis. 
  

  

  Teilobita. 
  

  

  Agnostus 
  agnostiformis, 
  M'Coy 
  

  

  ( 
  = 
  trinodus, 
  Salt.). 
  

   Ampyx 
  sp. 
  

  

  Asaphus 
  radiatus, 
  Salt. 
  ? 
  

   Cheirurus 
  juvenis, 
  Salt. 
  ? 
  

  

  Beachiopoda. 
  Ortliis 
  sp. 
  

   Molltjsca. 
  Hyolithus 
  sp. 
  

  

  Echinodermata. 
  Glyptocystites, 
  cf. 
  Logani, 
  Billings. 
  

  

  The 
  general 
  facies 
  of 
  the 
  fauna 
  appears 
  to 
  indicate 
  a 
  lower 
  

   horizon 
  than 
  the 
  limestone 
  at 
  the 
  spot 
  marked 
  C. 
  None 
  of 
  the 
  

   species 
  are 
  characteristic 
  Upper 
  Bala 
  forms, 
  and 
  nearly 
  all 
  occur 
  in 
  

   the 
  Middle 
  Bala 
  of 
  Great 
  Britain. 
  

  

  Teinucletjs 
  seticoenis, 
  His., 
  var. 
  poeteainensis 
  nov. 
  

  

  Head-shield 
  as 
  in 
  the 
  type-form 
  of 
  Hisinger's 
  species, 
  with 
  the 
  

   exception 
  of 
  the 
  limb. 
  Genal 
  angles 
  of 
  limb 
  flattened 
  out, 
  and 
  not 
  

   produced 
  backward 
  behind 
  the 
  head, 
  as 
  in 
  the 
  type-form. 
  Limb 
  

   divided 
  in 
  front 
  into 
  two 
  parts 
  by 
  an 
  encircling 
  striated 
  groove, 
  but 
  

   not 
  so 
  markedly 
  as 
  in 
  the 
  type-form. 
  

  

  On 
  the 
  inner 
  portion 
  of 
  the 
  flattened 
  expansions 
  of 
  the 
  limb 
  at 
  the 
  

  

  