﻿110 
  

  

  PKOCEEDTNGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Dec. 
  2, 
  

  

  The 
  Beds 
  Nos. 
  3 
  and 
  4 
  of 
  the 
  above 
  section 
  doubtfully 
  belong 
  to 
  

   the 
  Lower 
  Lias, 
  and 
  perhaps 
  should 
  be 
  referred 
  to 
  the 
  White 
  Lias. 
  

   Up 
  to 
  the 
  present 
  time 
  only 
  the 
  species 
  mentioned 
  above 
  have 
  been 
  

   found 
  in 
  them 
  ; 
  and 
  as 
  these 
  occur 
  also 
  in 
  the 
  Lower 
  Lias, 
  the 
  

   evidence 
  they 
  afford 
  is 
  not 
  of 
  a 
  positive 
  character. 
  

  

  The 
  fossils 
  of 
  Bed 
  No. 
  2 
  are 
  but 
  few 
  in 
  number; 
  they, 
  however, 
  occur 
  

   with 
  others 
  on 
  the 
  shores 
  of 
  Larne 
  Lough. 
  There 
  the 
  most 
  charac- 
  

   teristic 
  fossil 
  is 
  Ammonites 
  intermedins. 
  The 
  species 
  associated 
  with 
  

   it 
  are 
  those 
  that 
  characterize 
  the 
  zone 
  of 
  Ammonites 
  Bucklandi 
  of 
  

   Gloucestershire. 
  This 
  Ammonite 
  is 
  here 
  replaced 
  by 
  A. 
  intermedins 
  

   (Portlock). 
  

  

  List 
  of 
  Fossils 
  from 
  the 
  Lower 
  Lias. 
  

   [Those 
  with 
  the 
  prefix 
  C. 
  occur 
  in 
  Colin 
  Glen.] 
  

  

  Vertebrae 
  of 
  Ichthyosaurus. 
  

   C. 
  Ammonites 
  intermedius, 
  Port!. 
  

  

  Turneri, 
  Sow. 
  

  

  angulatus, 
  Schloth. 
  

  

  Nautilus 
  striatus, 
  Sow. 
  

  

  Cerithium, 
  sp. 
  

  

  Chemnitzia 
  Blainvillei, 
  Milnst. 
  

  

  septemcincta, 
  Milnst. 
  

  

  , 
  sp. 
  

  

  Dentalium 
  minimum, 
  Strick- 
  

   land. 
  

  

  Pleurotomaria 
  Anglica, 
  Sow. 
  

  

  expansa, 
  Sow. 
  

  

  Tornatella 
  fragilis, 
  Dunk. 
  

  

  Turbo 
  paludinarius, 
  Milnst. 
  

  

  elegans, 
  Milnst. 
  

  

  C. 
  Avicula 
  ina?quivalvis 
  ? 
  

  

  Astarte 
  dentilabrum, 
  n. 
  sp. 
  

  

  Cardinia 
  Listeri, 
  Stutchb. 
  

   C. 
  ovalis, 
  Stutchb. 
  

  

  Cardium 
  truncatum, 
  Sow. 
  

  

  Ceromya 
  gibbosa, 
  n. 
  sp. 
  

  

  Corbis 
  uniformis, 
  Phil. 
  

  

  Cuculla?a 
  psilonoti, 
  Quenst. 
  

  

  Goniomya 
  rhombifera, 
  Gold/. 
  

   C. 
  Gryphrea 
  incurva, 
  Sow. 
  

   C. 
  Leda 
  rostralis, 
  Goldf. 
  

   C. 
  Lima 
  acuticosta, 
  Goldf. 
  

  

  antiquata, 
  Sow. 
  

  

  C. 
  Lima 
  gigantea, 
  Sow. 
  

  

  C. 
  Hermanni, 
  Voltz. 
  

  

  pectiniformis, 
  Schloth. 
  

  

  C. 
  punctata, 
  Sow. 
  

  

  C. 
  Modiola 
  euneata, 
  Sow. 
  

  

  C. 
  minima, 
  Sow. 
  

  

  Hillana, 
  Sow. 
  

  

  Nucula 
  variabilis 
  (?), 
  Sow. 
  

  

  Ostrea 
  arietis, 
  Quenst. 
  

   C. 
  irregularis, 
  Milnst. 
  

  

  Pecten 
  textorius, 
  Schloth. 
  

  

  calvus, 
  Goldf. 
  

  

  C. 
  Pleuromya 
  unioides, 
  Agass. 
  

  

  Perna 
  infraliassica, 
  Quenst. 
  

  

  Pholadomya 
  glabra, 
  Agass. 
  

  

  Plicatula 
  spinosa, 
  Sow. 
  

  

  Unicardium 
  cardioides, 
  Phil. 
  

  

  Orbicula 
  reflexa, 
  Sow. 
  

  

  Lingula 
  Beani, 
  Phil. 
  

  

  Terebratula 
  punctata, 
  Sow. 
  

  

  Pollicipes 
  liassicus, 
  n. 
  sp. 
  

  

  Serpula 
  socialis, 
  Goldf 
  

  

  • 
  raricostata 
  ?, 
  Quenst. 
  

  

  Cidaris 
  Edwardsii, 
  Wr. 
  

   C. 
  Hemipedina, 
  sp. 
  

  

  Pentacrinus 
  tuberculatus, 
  Mill. 
  

  

  Montlivaltia 
  Haimei, 
  Chapuis 
  

   et 
  Dewalque. 
  

  

  This 
  list 
  contains 
  several 
  species 
  which 
  are 
  more 
  especially 
  cha- 
  

   racteristic 
  of 
  higher 
  zones 
  ; 
  many 
  of 
  these, 
  however, 
  are 
  rare. 
  The 
  

   more 
  common 
  species 
  are 
  : 
  — 
  

  

  Ammonites 
  intermedius, 
  Dentalium 
  minimum, 
  Chemnitzia 
  septem- 
  

   cincta, 
  Cardinia 
  ovalis, 
  Corbis 
  uniformis, 
  Gryphcea 
  incurva, 
  Lima 
  

   gigantea, 
  Ostrea 
  irregularis, 
  Cucullwa 
  psilonoti 
  , 
  Unicardium 
  cardioides, 
  

   Pentacrinus 
  tuberculatus, 
  Cidaris 
  Edwardsii. 
  

  

  7. 
  Distribution 
  of 
  the 
  Liassic 
  Rocks 
  in 
  the 
  North 
  of 
  Ireland. 
  — 
  The 
  

   presence 
  of 
  the 
  Lower 
  Lias, 
  and 
  to 
  some 
  extent 
  its 
  thickness, 
  are 
  

   dependent 
  on 
  the 
  amount 
  of 
  denudation 
  before 
  the 
  deposition 
  of 
  the 
  

   overlying 
  Cretaceous 
  strata, 
  or, 
  in 
  some 
  cases, 
  to 
  denudation 
  subse- 
  

   quent 
  to 
  their 
  deposition. 
  This 
  formation 
  I 
  have 
  traced 
  on 
  the 
  south 
  

  

  