﻿OF 
  THE 
  MORAY 
  FIRTH 
  AREA. 
  

  

  263 
  

  

  are 
  certain 
  spine-like 
  bodies 
  showing 
  a 
  similar 
  external 
  ornament, 
  

   as 
  well 
  as 
  a 
  similar 
  microscopic 
  structure. 
  Some 
  of 
  these 
  spines 
  

   are 
  bilaterally 
  symmetrical, 
  and 
  are 
  clearly 
  median 
  structures, 
  

   like 
  the 
  one 
  figured 
  by 
  Pander 
  (33, 
  PI. 
  vii. 
  fig. 
  16); 
  others 
  

   evidently 
  were 
  paired 
  appendages, 
  and 
  were 
  indeed 
  figured 
  by 
  

   Trautschold 
  as 
  pectoral 
  limbs 
  of 
  Coccosteus. 
  That 
  these 
  bodies 
  

   could 
  not 
  belong 
  to 
  Coccnsteus, 
  and 
  that 
  they 
  were 
  in 
  all 
  probability 
  

   appendages 
  of 
  a 
  shark 
  or 
  selachian 
  was 
  pointed 
  out 
  by 
  me 
  in 
  my 
  

   paper 
  on 
  the 
  last-named 
  genus 
  (46, 
  pp. 
  133-134); 
  and 
  in 
  his 
  

   Catalogue 
  (47, 
  p. 
  126) 
  Mr. 
  Smith 
  Woodward 
  has 
  brought 
  them 
  

   under 
  Psammosfevs. 
  Now, 
  none 
  of 
  these 
  spines, 
  either 
  median 
  or 
  

   lateral, 
  have 
  been 
  found 
  in 
  the 
  quarries 
  near 
  Elgin, 
  which 
  yield 
  the 
  

   plates 
  of 
  Psammosteus 
  Tai/lori. 
  I 
  am 
  however 
  indebted 
  to 
  Mr. 
  

   Grant 
  of 
  Lossiemouth 
  for 
  the 
  opportunity 
  of 
  figuring 
  a 
  fragment 
  

   of 
  a 
  lateral 
  spine 
  found 
  by 
  him 
  at 
  Scaat 
  Craig, 
  from 
  which 
  locality 
  

   also 
  Mr. 
  W. 
  Taylor 
  has 
  more 
  recently 
  obtained 
  small 
  pieces 
  of 
  Psam- 
  

   mostean 
  plates. 
  This 
  fragment 
  is 
  represented 
  in 
  PI. 
  vi. 
  fig. 
  4, 
  and 
  

   is 
  evidently 
  the 
  mere 
  termination 
  of 
  one 
  of 
  these 
  appendages. 
  It 
  

   measures 
  | 
  inch 
  in 
  length 
  by 
  f 
  inch 
  in 
  breadth 
  where 
  it 
  is 
  broken 
  

   off 
  proximally. 
  Its 
  surface 
  is 
  ornamented 
  by 
  stellate 
  tubercles, 
  

   which 
  are, 
  however, 
  elongated 
  in 
  form 
  and 
  arranged 
  in 
  parallel 
  

   concentric 
  arches, 
  whose 
  convexities 
  are 
  directed 
  towards 
  the 
  

   broken 
  apex 
  of 
  the 
  spine. 
  In 
  none 
  of 
  the 
  other 
  collections 
  of 
  

   fossils 
  from 
  Scaat 
  Craig 
  which 
  I 
  have 
  examined 
  have 
  I 
  seen 
  am 
  

   thing 
  of 
  this 
  nature. 
  

  

  Localities 
  for 
  Psammosteus 
  Taylor 
  i. 
  — 
  Balnagown, 
  Koss-shire 
  ; 
  

   Sweet 
  Hillock, 
  Alves 
  ; 
  Newton 
  Quarry, 
  between 
  Alves 
  and 
  Elgin. 
  

  

  Lateral 
  spine 
  of 
  Psammosteus, 
  sp. 
  — 
  Scaat 
  Craig. 
  

  

  As 
  mentioned 
  above, 
  fragments 
  of 
  plates 
  apparently 
  belonging 
  

   to 
  P.«iinmostntshiiY(! 
  recently 
  been 
  found 
  by 
  Mr. 
  W.Taylor 
  at 
  Scaat 
  

   Craig, 
  but 
  it 
  is 
  doubtful 
  whether 
  they 
  are 
  referable 
  to 
  the 
  same 
  

   species 
  as 
  that 
  which 
  occurs 
  in 
  the 
  Alves 
  district 
  and 
  at 
  Balnagown. 
  

  

  Selachian 
  SjpiBti. 
  

   Genus 
  COSMACANTHUS, 
  Agamz. 
  

   Cosmacanthus 
  Malcolmsoni, 
  .ty/ssi:, 
  1st."). 
  

  

  (PI. 
  vi. 
  fi 
  K 
  t. 
  6-9.) 
  

  

  The 
  very 
  beautiful 
  fragment 
  from 
  Scjiat 
  Craig, 
  named 
  by 
  Agassi, 
  

   Cosmacanthus 
  Malcolmsoni 
  (2D, 
  p. 
  I 
  JO, 
  PI. 
  .".3, 
  tig. 
  28), 
  and 
  con 
  

  

  