﻿114 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Dec. 
  2, 
  

  

  Locality. 
  — 
  Discovered 
  by 
  Mr. 
  Tate 
  in 
  some 
  abundance, 
  associated 
  

   with 
  Cardinia 
  ovalis, 
  on 
  the 
  east 
  shore 
  of 
  Larne 
  Lough. 
  

  

  Pollicipes 
  liassicus, 
  Etheridge. 
  

  

  This 
  single 
  valve 
  or 
  scutum 
  of 
  Pollicipes 
  is, 
  I 
  believe, 
  the 
  oldest 
  

   known; 
  at 
  least, 
  none 
  have 
  been 
  described 
  from 
  beds 
  older 
  than 
  

   the 
  Great 
  Oolite. 
  It 
  is 
  an 
  interesting 
  form 
  ; 
  but 
  a 
  specific 
  description, 
  

   or 
  the 
  statement 
  of 
  any 
  affinities 
  based 
  upon 
  a 
  single 
  valve, 
  and 
  

   that 
  one 
  of 
  the 
  most 
  variable 
  of 
  the 
  elements 
  of 
  the 
  test 
  of 
  the 
  

   Cirripedia, 
  would 
  be 
  premature. 
  The 
  characters 
  shown 
  in 
  this 
  single 
  

   valve 
  (scutum) 
  determine 
  it 
  to 
  be 
  a 
  new 
  species 
  ; 
  I 
  therefore 
  ven- 
  

   ture 
  to 
  name 
  it 
  P. 
  liassicus. 
  

  

  A 
  single 
  valve 
  from 
  the 
  east 
  shore 
  of 
  Larne 
  Lough, 
  found 
  by 
  

   Mr. 
  Tate. 
  [R. 
  E.] 
  

  

  3. 
  Notes 
  on 
  the 
  Devonian 
  Rocks 
  of 
  the 
  BosphopvIjs. 
  

   By 
  W. 
  R. 
  Swan, 
  Esq. 
  

  

  [In 
  a 
  letter 
  to 
  Sir 
  R. 
  I. 
  Murchison, 
  K.C.B., 
  F.R.S., 
  F.G.S.] 
  

  

  The 
  strata 
  of 
  the 
  Bosphorus 
  consist, 
  for 
  the 
  most 
  part, 
  of 
  grey, 
  

   green, 
  brown, 
  and 
  yellowish 
  argillaceous 
  shales, 
  schists, 
  and 
  sand- 
  

   stones, 
  more 
  or 
  less 
  micaceous, 
  with 
  occasional 
  beds 
  of 
  grey 
  argilla- 
  

   ceous 
  limestones, 
  in 
  part 
  subcrystalline 
  and 
  generally 
  concretionary. 
  

   The 
  strike 
  of 
  the 
  strata 
  varies 
  : 
  in 
  some 
  parts 
  it 
  is 
  about 
  due 
  north 
  

   and 
  south, 
  in 
  others 
  about 
  north-east 
  and 
  south-west 
  ; 
  the 
  full 
  rise 
  

   being 
  from 
  east 
  varying 
  to 
  south-east, 
  that 
  is, 
  into 
  Asia 
  Minor. 
  

  

  The 
  eruptive 
  rocks 
  (not 
  including 
  the 
  Trachytic 
  rocks 
  on 
  both 
  sides 
  

   of 
  the 
  Bosphorus 
  at 
  the 
  entrance 
  into 
  the 
  Black 
  Sea, 
  and 
  as 
  far 
  down 
  

   as 
  nearly 
  to 
  Buyukdere) 
  are 
  greenstones 
  of 
  the 
  hornblendic 
  character, 
  

   varying 
  from 
  fine-grained 
  to 
  coarse 
  and 
  porphyritic, 
  and 
  in 
  many 
  

   parts 
  much 
  decomposed 
  ; 
  they 
  occur 
  as 
  dykes 
  and 
  large 
  bosses, 
  and 
  

   are 
  in 
  such 
  abundance 
  that 
  the 
  strata 
  are 
  greatly 
  broken 
  up 
  and 
  

   disordered, 
  and 
  in 
  parts 
  so 
  altered 
  by 
  heat 
  as 
  to 
  become 
  subcrys- 
  

   talline, 
  with 
  imperfect 
  slaty 
  cleavage. 
  In 
  consequence 
  there 
  is 
  

   scarcely 
  a 
  good 
  building-stone 
  to 
  be 
  found 
  around 
  Constantinople, 
  

   with 
  the 
  exception 
  of 
  the 
  limestones, 
  and 
  they 
  are, 
  after 
  all, 
  none 
  of 
  

   the 
  best, 
  and 
  too 
  expensive 
  to 
  dress 
  to 
  constitute 
  a 
  stone 
  for 
  general 
  

   purposes. 
  The 
  larger 
  eruptions 
  of 
  trap, 
  or 
  bosses, 
  are 
  to 
  be 
  found 
  

   at 
  several 
  of 
  the 
  prominent 
  points 
  of 
  the 
  Bosphorus, 
  such 
  as 
  Kandili 
  

   Point, 
  Roumili 
  Hissar 
  Point, 
  &c. 
  and 
  may 
  possibly 
  have 
  had 
  some- 
  

   thing 
  to 
  do 
  with 
  the 
  forming 
  of 
  this 
  far-famed 
  channel. 
  

  

  I 
  shall 
  now 
  attempt 
  to 
  give 
  a 
  description 
  of 
  the 
  fossils 
  of 
  the 
  

   Bosphorus, 
  first 
  premising 
  that 
  as 
  the 
  means 
  of 
  comparison 
  with 
  

   the 
  fauna 
  of 
  other 
  countries 
  at 
  my 
  disposal 
  have 
  been 
  very 
  limited 
  

   and 
  confined 
  to 
  only 
  a 
  few 
  works 
  on 
  geology, 
  I 
  shall 
  not 
  attempt 
  

   to 
  give 
  the 
  name 
  of 
  each 
  fossil, 
  but 
  simply 
  confine 
  myself 
  at 
  present 
  

   to 
  a 
  description 
  of 
  the 
  species 
  found 
  ; 
  the 
  fossils 
  also 
  in 
  general 
  are 
  

   in 
  such 
  a 
  broken 
  and 
  decomposed 
  state 
  that 
  it 
  is 
  next 
  to 
  im- 
  

   possible 
  to 
  recognize 
  many 
  of 
  them. 
  And, 
  firstly, 
  I 
  have 
  not 
  been 
  

  

  