﻿OF 
  THE 
  MORAY 
  FIRTH 
  AREA. 
  

  

  267 
  

  

  laminar 
  crest 
  rising 
  from 
  the 
  middle 
  line 
  of 
  the 
  dorsal 
  surface. 
  

   Shortly 
  afterwards 
  Mr. 
  William 
  Taylor 
  procured 
  from 
  the 
  same 
  

   quarry 
  two 
  additional 
  specimens, 
  showing 
  the 
  impression 
  of 
  part 
  

   of 
  the 
  back 
  in 
  such 
  a 
  way 
  as 
  clearly 
  to 
  prove 
  the 
  existence 
  of 
  this 
  

   singular 
  crest. 
  

  

  I 
  regret 
  that 
  space 
  will 
  not 
  permit 
  of 
  my 
  figuring 
  Mr. 
  Taylor's 
  

   specimens, 
  which 
  he 
  kindly 
  presented 
  to 
  the 
  Edinburgh 
  Museum, 
  

   but 
  in 
  Plate 
  ix. 
  figs. 
  1-3, 
  I 
  have 
  represented 
  in 
  three 
  views 
  the 
  

   original 
  example 
  procured 
  by 
  Dr. 
  Gordon, 
  and 
  now 
  in 
  the 
  Museum 
  

   at 
  Elgin. 
  

  

  Fig. 
  2 
  shows 
  the 
  ventral 
  surface 
  of 
  the 
  specimen 
  replaced 
  in 
  

   the 
  matrix, 
  on 
  which 
  is 
  also 
  seen 
  the 
  greater 
  part 
  of 
  the 
  left 
  

   pectoral 
  appendage 
  or 
  'arm.' 
  The 
  length 
  of 
  this 
  arm 
  shows 
  that 
  

   the 
  present 
  species 
  is 
  referable 
  to 
  Bothriolepis, 
  as, 
  although 
  its 
  

   extremity 
  is 
  incomplete, 
  it 
  has 
  clearly 
  extended 
  beyond 
  the 
  

   carapace 
  posteriorly 
  ; 
  the 
  1 
  upper 
  arm,' 
  too, 
  extends 
  to 
  opposite 
  

   the 
  middle 
  of 
  the 
  posterior 
  ventro-lateral 
  plate 
  (p. 
  v. 
  /.), 
  where 
  the 
  

   joint 
  between 
  it 
  and 
  the 
  1 
  forearm 
  ' 
  is 
  distinctly 
  seen. 
  On 
  the 
  body 
  

   carapace 
  are 
  the 
  right 
  and 
  left 
  anterior 
  ventrolaterals 
  (a. 
  v. 
  /.), 
  

   with 
  the 
  small 
  semilunar 
  (#. 
  I.) 
  between 
  them 
  in 
  front, 
  as 
  well 
  as 
  

   the 
  two 
  posterior 
  rentru-hitvrak 
  (p. 
  v. 
  /.), 
  and 
  the 
  lozenge-shaped 
  

   space 
  in 
  the 
  centre 
  occupied 
  by 
  the 
  median 
  vmtral 
  (m 
  r.). 
  On 
  the 
  

   right 
  side 
  of 
  the 
  body 
  in 
  front 
  is 
  seen 
  the 
  place 
  of 
  attachment 
  of 
  

   the 
  right 
  pectoral 
  appendage 
  (or.). 
  

  

  In 
  Fig. 
  1 
  the 
  specimen, 
  still 
  in 
  the 
  matrix, 
  is 
  shown 
  from 
  the 
  

   right 
  lateral 
  aspect, 
  whereby 
  the 
  unusual 
  height 
  (for 
  Jiothriolepis) 
  

   of 
  the 
  sides 
  is 
  brought 
  into 
  view. 
  This 
  is 
  seen 
  to 
  be 
  due 
  to 
  the 
  

   ron-idcrable 
  depth 
  of 
  the 
  lateral 
  portions 
  of 
  the 
  anterior 
  and 
  

   posterior 
  dorso-lateral 
  plates 
  (it. 
  d. 
  I. 
  and 
  p. 
  d. 
  /.), 
  which 
  are 
  at 
  least 
  

   twice 
  as 
  deep 
  proportionally 
  as 
  in 
  species 
  of 
  the 
  usual 
  depressed 
  

   types, 
  such 
  as 
  B. 
  major, 
  Cumuh 
  n.«i.<, 
  hi/t/mjihila. 
  Then, 
  on 
  the 
  

   matrix 
  at 
  cr, 
  the 
  impression 
  of 
  the 
  dorsal 
  crest 
  is 
  seen 
  arising 
  from 
  

   the 
  middle 
  line 
  of 
  the 
  anterior 
  median 
  dorsal 
  just 
  behind 
  the 
  

   centre 
  of 
  the 
  plate, 
  whence 
  it 
  is 
  continued 
  backwards 
  over 
  two 
  

   thirds 
  of 
  the 
  extent 
  of 
  the 
  posterior 
  median 
  dorsal 
  ; 
  the 
  crest 
  

   itself 
  is 
  higher 
  about 
  its 
  middle 
  third, 
  and 
  falls 
  away 
  gently 
  both 
  

   in 
  front 
  and 
  behind. 
  

  

  The 
  view 
  of 
  the 
  dorsal 
  surface, 
  Fig. 
  requires 
  little 
  comment, 
  

   except 
  that 
  it 
  appears 
  proportionally 
  rather 
  narrower 
  than 
  is 
  

  

  