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  74 
  PEOCEEDINGS 
  OE 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  Eeptilia 
  1 
  genus 
  and 
  1 
  species. 
  

  

  Pisces 
  2 
  

  

  Belemnites 
  1 
  

  

  Ammonites 
  1 
  

  

  Gasteropoda 
  8 
  

  

  Dimyaria 
  5 
  

  

  Monomyaria 
  7 
  

  

  Brachiopoda 
  3 
  

  

  Annelida 
  1 
  

  

  Echinoidea 
  2 
  

  

  Ccelenterata 
  2 
  

  

  Plants 
  3 
  

  

  36 
  61 
  

  

  These 
  beds 
  have 
  hitherto 
  been 
  regarded 
  as 
  of 
  Liassic 
  age 
  ; 
  the 
  

   fauna, 
  however, 
  leaves 
  no 
  doubt 
  as 
  to 
  the 
  horizon 
  to 
  which 
  they 
  

   belong. 
  The 
  group 
  Planidati, 
  the 
  Belemnites, 
  the 
  Brachiopoda, 
  and 
  

   the 
  Plantse 
  all 
  definitely 
  fix 
  the 
  age 
  of 
  these 
  calcareous 
  and 
  arena- 
  

   ceous 
  beds. 
  

  

  The 
  Eathie-Bay 
  beds 
  south 
  of 
  Cromarty 
  are 
  remarkable 
  for 
  the 
  

   series 
  of 
  Cephalopoda 
  ; 
  the 
  Ammonites 
  and 
  Belemnites 
  more 
  than 
  

   equal 
  all 
  other 
  groups 
  yet 
  obtained, 
  the 
  former 
  yielding 
  12 
  species, 
  

   the 
  latter 
  3 
  ; 
  only 
  one 
  species 
  each 
  of 
  Gasteropoda 
  and 
  Dimyaria 
  

   have 
  occurred, 
  and 
  5 
  species 
  of 
  Monomyaria. 
  Leaves 
  and 
  cones 
  of 
  

   Coniferae, 
  leaves, 
  buds, 
  and 
  stems 
  of 
  Cycadeae, 
  and 
  fronds 
  of 
  ferns 
  

   occur. 
  The 
  Ammonites 
  indicate 
  that 
  the 
  fauna 
  may 
  be 
  assigned 
  to 
  

   the 
  age 
  of 
  the 
  Kimmeridge 
  Clay 
  and 
  to 
  the 
  zones 
  of 
  Ammonites 
  mu- 
  

   tabilis 
  and 
  A. 
  alternans 
  of 
  Dr. 
  Waagen. 
  These 
  strata, 
  so 
  far 
  as 
  we 
  

   know, 
  form 
  the 
  highest 
  beds 
  of 
  the 
  Secondary 
  rocks 
  exposed 
  "in 
  situ 
  

   on 
  the 
  east 
  coast 
  of 
  Scotland 
  " 
  (Judd, 
  loc. 
  cit. 
  pp. 
  181, 
  184). 
  

  

  Prof. 
  Judd's 
  Table 
  No. 
  I., 
  facing 
  p. 
  194, 
  is 
  a 
  masterpiece 
  of 
  com- 
  

   pilation 
  and 
  composition. 
  The 
  centre 
  column, 
  devoted 
  to 
  the 
  cha- 
  

   racteristic 
  fossils, 
  is 
  of 
  the 
  highest 
  value 
  to 
  the 
  stratigraphical 
  

   geologist; 
  it 
  gives 
  a 
  most 
  complete 
  history 
  of 
  the 
  successive 
  horizons 
  

   from 
  the 
  Lower 
  Lias 
  to 
  the 
  lower 
  part 
  of 
  the 
  Kimmeridge 
  Clay. 
  In 
  

   Sutherland 
  alone 
  we 
  have 
  good 
  evidence 
  of 
  13 
  horizons. 
  Mr. 
  Judd's 
  

   Table 
  epitomizes 
  the 
  contents 
  of 
  his 
  paper 
  so 
  as 
  to 
  leave 
  little 
  want- 
  

   ing 
  to 
  elucidate 
  the 
  history 
  of 
  the 
  Lower, 
  Middle, 
  and 
  Upper 
  Oolites 
  

   of 
  the 
  east 
  of 
  Scotland. 
  To 
  analyze 
  this 
  Table 
  would 
  be 
  almost 
  

   impossible 
  ; 
  but, 
  to 
  a 
  certain 
  extent, 
  I 
  have 
  done 
  it 
  in 
  giving 
  a 
  sum- 
  

   mary 
  of 
  the 
  author's 
  discoveries 
  in 
  Sutherland. 
  

  

  His 
  table 
  No. 
  II. 
  gives 
  a 
  comparative 
  view 
  of 
  all 
  the 
  Secondary 
  

   rocks 
  of 
  the 
  east 
  of 
  Scotland, 
  from 
  the 
  Trias 
  to 
  the 
  Upper 
  Green- 
  

   sand 
  ; 
  the 
  division 
  of 
  the 
  groups 
  of 
  Ammonites 
  ; 
  nature 
  of 
  deposit, 
  

   whether 
  marine 
  or 
  estuarine 
  ; 
  thickness 
  ; 
  and 
  where 
  certain 
  strata 
  

   are 
  seen 
  in 
  situ 
  in 
  other 
  counties. 
  

  

  In 
  January 
  1878 
  Prof. 
  Judd 
  communicated 
  his 
  second 
  paper 
  on 
  

   the 
  Secondary 
  rocks 
  of 
  Scotland 
  (the 
  Strata 
  of 
  the 
  Western 
  Coast 
  and 
  

   Islands). 
  The 
  intermediate 
  paper 
  of 
  1874 
  had 
  reference 
  chiefly 
  to 
  

  

  