﻿pholidophohid^:. 
  483 
  

  

  tuberculations 
  ; 
  maxilla 
  more 
  or 
  less 
  arched 
  and 
  the 
  oral 
  margin 
  

   convex 
  ; 
  teeth 
  minute. 
  Vertebral 
  centra 
  annular. 
  Fulcra 
  present 
  

   on 
  all 
  the 
  fins. 
  Pelvic 
  fins 
  well 
  developed, 
  but 
  smaller 
  than 
  the 
  

   pectorals 
  ; 
  dorsal 
  and 
  anal 
  fins 
  longer 
  than 
  deep, 
  opposite. 
  Scales 
  

   thick 
  and 
  moderately 
  overlapping 
  ; 
  those 
  of 
  the 
  middle 
  of 
  the 
  

   flank 
  excessively 
  deepened, 
  covering 
  nearly 
  the 
  whole 
  of 
  it, 
  each 
  

   strengthened 
  within 
  by 
  a 
  broad 
  rib 
  and 
  exhibiting 
  a 
  peg-and-socket 
  

   articululation 
  ; 
  dorsal 
  and 
  ventral 
  scales 
  few, 
  relatively 
  small 
  and 
  

   rhomboidal. 
  Lateral 
  line 
  deflected, 
  passing 
  down 
  the 
  second 
  or 
  

   third 
  deepened 
  flank-scale 
  and 
  then 
  traversing 
  the 
  uppermost 
  series 
  

   of 
  small 
  ventral 
  scales. 
  

  

  Pleuropholis 
  attenuata, 
  Egerton. 
  

  

  1854. 
  Pleuropholis 
  attenuatus, 
  J. 
  Morris 
  (ex 
  Egerton, 
  MS.), 
  Catal. 
  Brit. 
  

  

  Foss. 
  ed. 
  2, 
  p. 
  339 
  (name 
  only). 
  

   1858. 
  Pleuropholis 
  attenuatus, 
  Sir 
  P. 
  Egerton, 
  Figs. 
  & 
  Descript. 
  Brit. 
  

  

  Organic 
  Remains, 
  dec. 
  ix. 
  (Mem. 
  Geol. 
  Surv.), 
  no. 
  7, 
  p. 
  1, 
  pi. 
  vii. 
  

  

  fig. 
  1. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  olim 
  Bristow 
  Collection. 
  

  

  The 
  type 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*05. 
  Length 
  of 
  

   head 
  with 
  opercular 
  apparatus 
  slightly 
  exceeding 
  the 
  maximum 
  

   depth 
  of 
  the 
  trunk 
  and 
  contained 
  about 
  five 
  times 
  in 
  the 
  total 
  length 
  

   of 
  the 
  fish 
  ; 
  caudal 
  pedicle 
  slender, 
  its 
  width 
  equalling 
  about 
  half 
  

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

   Opercular 
  bones 
  smooth. 
  Pelvic 
  fins 
  arising 
  midway 
  between 
  the 
  

   pectorals 
  and 
  the 
  anal 
  ; 
  dorsal 
  fin 
  with 
  ten 
  rays, 
  arising 
  directly 
  

   opposite 
  to 
  the 
  origin 
  of 
  the 
  anal 
  fin, 
  which 
  has 
  at 
  least 
  twelve 
  rays, 
  

   and 
  arises 
  nearly 
  midway 
  between 
  the 
  pectoral 
  and 
  caudal 
  fins. 
  

   Scales 
  smooth, 
  not 
  serrated. 
  

  

  Form, 
  fy 
  Loc, 
  Middle 
  Purbeckian 
  : 
  Apsel 
  Lane, 
  near 
  Sutton 
  

   Mandeville. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Pleuropholis 
  longicaudata, 
  Egerton. 
  

  

  1858. 
  Pleuropholis 
  longicaudus, 
  Sir 
  P. 
  Egerton, 
  Figs. 
  & 
  Descript. 
  Brit 
  

   Organic 
  Remains, 
  dec. 
  ix. 
  (Mem. 
  Geol. 
  Surv.), 
  no. 
  7, 
  p. 
  3, 
  pi. 
  vii. 
  

   fig. 
  4. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  olim 
  collection 
  of 
  W, 
  Brodie. 
  

   A 
  fish 
  not 
  yet 
  clearly 
  distinguished 
  from 
  the 
  type 
  species, 
  but 
  

   apparently 
  with 
  slightly 
  less 
  deepened 
  flank-scales. 
  

   Form. 
  Sf 
  Loc. 
  Middle 
  Purbeckian 
  : 
  Dorsetshire. 
  

  

  2i2 
  

  

  