﻿pholidofhoruxs:. 
  487 
  

  

  Pleuropholis 
  serrata, 
  Egerton. 
  

  

  1858. 
  Pleuropholis 
  sei-ratus, 
  Sir 
  P. 
  Egerton, 
  Figs. 
  & 
  Descript. 
  Brit. 
  

   Organic 
  Remains, 
  dec. 
  ix. 
  (Mem. 
  Geol. 
  Surv.), 
  no. 
  7, 
  p. 
  5, 
  pi. 
  vii. 
  

   figs. 
  5-9. 
  

  

  Type. 
  Imperfect 
  fish 
  ; 
  olim 
  collection 
  of 
  Dr. 
  John 
  Lee, 
  Hartwell. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*1. 
  Length 
  of 
  head 
  with 
  

   opercular 
  apparatus 
  about 
  equalling 
  the 
  maximum 
  depth 
  of 
  the 
  

   trunk, 
  and 
  contained 
  five 
  times 
  in 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  

   width 
  of 
  caudal 
  pedicle 
  slightly 
  exceeding 
  one-half 
  the 
  depth 
  of 
  the 
  

   flank-scales 
  in 
  the 
  middle 
  of 
  the 
  abdominal 
  region. 
  Distance 
  

   between 
  origin 
  of 
  anal 
  fin 
  and 
  that 
  of 
  the 
  caudal 
  scarcely 
  exceeding 
  

   half 
  that 
  between 
  the 
  former 
  and 
  the 
  pectorals 
  ; 
  dorsal 
  fin 
  arising 
  

   opposite 
  or 
  just 
  behind 
  the 
  origin 
  of 
  the 
  anal. 
  Scales 
  smooth, 
  but 
  

   those 
  of 
  the 
  deepened 
  series 
  with 
  fine 
  oblique 
  serrations. 
  

  

  Form. 
  Sf 
  Loe. 
  Purbeckian 
  : 
  Buckinghamshire. 
  

  

  40316-17. 
  Two 
  imperfect 
  fishes, 
  the 
  second 
  wanting 
  the 
  head 
  

   but 
  displaying 
  portions 
  of 
  all 
  the 
  fins 
  ; 
  Bishopstone. 
  

  

  Purchased, 
  1867. 
  

  

  P. 
  1102. 
  Two 
  fragments 
  ; 
  Hartwell. 
  Eyertou 
  Coll. 
  

  

  Fragmentary 
  remains 
  of 
  a 
  species 
  of 
  Pleuropholis 
  with 
  serrated 
  

   flank-scales, 
  much 
  resembling 
  P. 
  serrata 
  and 
  not 
  yet 
  distinguished 
  

   from 
  it, 
  have 
  been 
  obtained 
  from 
  the 
  Lower 
  Kimmeridgian 
  (Litho- 
  

   graphic 
  Stone) 
  of 
  Cirin, 
  Ain, 
  France. 
  One 
  imperfect 
  fish 
  in 
  the 
  

   Lyons 
  Museum 
  is 
  figured 
  by 
  Thiolliere, 
  Poiss. 
  Foss. 
  Bugey, 
  pt. 
  ii. 
  

   (1873), 
  pi. 
  vi. 
  fig. 
  5, 
  and 
  subsequently 
  described 
  under 
  the 
  name 
  of 
  

   P. 
  egertoni, 
  H. 
  E. 
  Sauvage 
  (non 
  Wagner), 
  Bull. 
  Soc. 
  Geol. 
  France, 
  

   [3] 
  vol. 
  xi. 
  (1883), 
  p. 
  498, 
  pi. 
  xiii. 
  fig. 
  1. 
  The 
  following 
  is 
  a 
  speci- 
  

   men 
  of 
  the 
  same 
  form 
  : 
  — 
  

  

  P. 
  4691 
  a. 
  Imperfect 
  fish 
  originally 
  about 
  0*07 
  in 
  length, 
  the 
  head 
  

   and 
  abdominal 
  region 
  and 
  serrated 
  flank-scales 
  displaced 
  ; 
  

   Cirin. 
  Purchased, 
  1884. 
  

  

  The 
  following 
  specimen 
  is 
  not 
  specifically 
  determined 
  : 
  — 
  

  

  40724. 
  Head 
  and 
  abdominal 
  region 
  of 
  a 
  comparatively 
  large 
  fish 
  

   with 
  small 
  head 
  and 
  deep 
  trunk 
  ; 
  Purbeck 
  Beds, 
  Swanage. 
  

   The 
  head 
  with 
  opercular 
  apparatus 
  measures 
  0*015 
  in 
  

   length, 
  and 
  the 
  depth 
  of 
  the 
  deepened 
  scales 
  above 
  the 
  

   region 
  of 
  the 
  pelvic 
  fins 
  is 
  0-013. 
  The 
  scales 
  are 
  smooth, 
  

   none 
  serrated. 
  Purchased, 
  1867. 
  

  

  