﻿PHOLIDOPHORTDJi:. 
  

  

  465 
  

  

  robust, 
  and 
  its 
  longitudinal 
  striations 
  delicate 
  ; 
  angle 
  of 
  the 
  

   preoperculum 
  with 
  few 
  short, 
  radiating 
  ridges. 
  Pelvic 
  fins 
  arising 
  

   far 
  in 
  advance 
  of 
  the 
  middle 
  point 
  of 
  the 
  trunk, 
  and 
  the 
  dorsal 
  fin 
  

   opposed 
  to 
  the 
  space 
  between 
  the 
  pelvic 
  and 
  anal 
  fins.' 
  Scales 
  

   large 
  and 
  smooth, 
  the 
  hinder 
  margin 
  strongly 
  though 
  finely 
  serrated, 
  

   and 
  the 
  sharp 
  points 
  passing 
  into 
  conspicuous 
  crenulations 
  when 
  the 
  

   surface 
  is 
  partly 
  abraded 
  : 
  five 
  longitudinal 
  flank-series 
  deeper 
  than 
  

   broad. 
  

  

  Form. 
  $■ 
  Loc. 
  Lower 
  Lias 
  : 
  Dorsetshire. 
  

  

  P. 
  1047. 
  Nearly 
  complete 
  fish 
  0*18 
  in 
  length, 
  shown 
  of 
  the 
  natural 
  

   size 
  in 
  PI. 
  XII. 
  fig. 
  7 
  ; 
  Lyme 
  Eegis. 
  The 
  maxilla 
  and 
  

   two 
  supramaxillaries 
  are 
  well 
  shown, 
  and 
  all 
  the 
  opercular 
  

   elements 
  are 
  distinguishable, 
  with 
  some 
  branchiostegal 
  

   rays 
  below. 
  The 
  small 
  pectoral 
  fins 
  are 
  nearly 
  complete, 
  

   and 
  exhibit 
  very 
  delicate, 
  slender 
  fulcra 
  ; 
  and 
  remains 
  of 
  

   the 
  pelvic, 
  anal, 
  and 
  dorsal 
  fins 
  indicate 
  their 
  precise 
  

   relative 
  positions. 
  The 
  caudal 
  fin 
  is 
  complete, 
  and 
  both 
  

   this 
  and 
  the 
  dorsal 
  are 
  conspicuously 
  fulcrated. 
  The 
  

   squamation 
  is 
  well 
  preserved, 
  and 
  attention 
  may 
  be 
  called 
  

   to 
  the 
  large 
  ridge-scale 
  on 
  the 
  upper 
  border 
  of 
  the 
  caudal 
  

   pedicle. 
  Egerton 
  Coll. 
  

  

  P. 
  3596. 
  Large 
  fish 
  displayed 
  from 
  the 
  ventro 
  -lateral 
  aspect, 
  

   wanting 
  the 
  greater 
  portion 
  of 
  the 
  head 
  and 
  caudal 
  fin, 
  

   and 
  the 
  dorsal 
  part 
  of 
  the 
  trunk 
  ; 
  Lyme 
  Eegis. 
  Minute 
  

   fulcra 
  are 
  distinctly 
  shown 
  on 
  the 
  pelvic 
  fins, 
  and 
  some- 
  

   what 
  larger 
  fulcra 
  on 
  the 
  anal 
  fin. 
  One 
  enlarged 
  median 
  

   ventral 
  scale 
  and 
  a 
  pair 
  of 
  smaller 
  scales 
  behind 
  evidently 
  

   denote 
  the 
  position 
  of 
  the 
  anus 
  immediately 
  in 
  front 
  of 
  

   the 
  anal 
  fin. 
  EnnisMllen 
  Coll. 
  

  

  36472. 
  A 
  smaller 
  specimen, 
  much 
  broken 
  but 
  wanting 
  only 
  the 
  

   pelvic 
  fins 
  ; 
  Lyme 
  Eegis. 
  Purchased, 
  1862. 
  

  

  38531-32. 
  Fish 
  about 
  0*16 
  in 
  length, 
  wanting 
  the 
  anterior 
  half 
  of 
  

   the 
  head, 
  and 
  another 
  distorted 
  specimen 
  ; 
  Lyme 
  Eegis. 
  

   The 
  operculum, 
  suboperculum, 
  and 
  preoperculum 
  (this 
  

   with 
  short 
  radiating 
  ridges) 
  are 
  well 
  shown 
  in 
  the 
  first 
  

   specimen 
  ; 
  a 
  clavicle 
  is 
  displayed 
  in 
  both. 
  

  

  Purchased, 
  1864. 
  

  

  41906. 
  Imperfectly 
  preserved 
  fish 
  0*145 
  in 
  length 
  ; 
  Lyme 
  Eegis. 
  

  

  Purchased, 
  1870. 
  

   Pi.RT 
  in. 
  2 
  H 
  

  

  