﻿480 
  ACTINOPTERYGII. 
  

  

  centra 
  annular. 
  " 
  Fulcra 
  wanting 
  on 
  the 
  pectoral 
  fins, 
  confined 
  to 
  

   the 
  bases 
  of 
  the 
  median 
  fins. 
  Pectoral 
  fins 
  small, 
  and 
  pelvic 
  fins 
  

   absent 
  ; 
  dorsal 
  and 
  anal 
  fins 
  opposed, 
  acuminate 
  in 
  front, 
  extended 
  

   behind. 
  Scales 
  thick, 
  with 
  very 
  thin 
  ganoine 
  ; 
  those 
  of 
  the 
  middle 
  

   of 
  the 
  flank 
  excessively 
  deepened, 
  covering 
  the 
  greater 
  part 
  of 
  it, 
  

   each 
  strengthened 
  within 
  by 
  a 
  broad 
  rib 
  and 
  nearly 
  all 
  the 
  scales 
  

   exhibiting 
  a 
  peg-and-socket 
  articulation 
  ; 
  those 
  of 
  the 
  ventral 
  aspect 
  

   numerous, 
  broader 
  than 
  deep. 
  Lateral 
  line 
  passing 
  directly 
  along 
  

   the 
  deepened 
  flank-scales. 
  

  

  This 
  genus 
  is 
  doubtfully 
  ascribed 
  to 
  the 
  Pholidophoridse. 
  

  

  Pholidopleurus 
  typus, 
  Bronn. 
  

   1858. 
  Pholidopleurus 
  typus, 
  H. 
  G. 
  Bronn, 
  Neues 
  Jahrb. 
  p. 
  12, 
  pi. 
  i. 
  

  

  figs. 
  11-15. 
  

   1866. 
  Pholidopleurus 
  typus, 
  R. 
  Kner, 
  Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  math.- 
  

  

  naturw. 
  CI. 
  vol. 
  liii. 
  pt. 
  i. 
  p. 
  176, 
  pi. 
  iv. 
  fig. 
  2. 
  

   1886. 
  Pholidopleurus 
  typus, 
  F. 
  Bassani, 
  Atti 
  Soc. 
  Ital. 
  Sci. 
  Nat. 
  

  

  vol. 
  xxix. 
  p. 
  36. 
  

  

  Type. 
  Nearly 
  complete 
  fish. 
  

  

  The 
  type 
  species, 
  attaining 
  a 
  length 
  of 
  about 
  0*1. 
  Length 
  of 
  

   head 
  with 
  opercular 
  apparatus 
  scarcely, 
  if 
  at 
  all, 
  exceeding 
  the 
  

   maximum 
  depth 
  of 
  the 
  trunk, 
  and 
  contained 
  about 
  five 
  times 
  or 
  

   slightly 
  more 
  in 
  the 
  total 
  length 
  of 
  the 
  fish. 
  Anal 
  fin 
  with 
  about 
  

   50 
  rays, 
  arising 
  at 
  a 
  point 
  twice 
  as 
  distant 
  from 
  the 
  pectorals 
  as 
  from 
  

   the 
  caudal 
  ; 
  dorsal 
  opposed 
  to 
  the 
  hinder 
  two-thirds 
  of 
  the 
  anal 
  fin, 
  

   with 
  about 
  40 
  rays. 
  External 
  bones 
  and 
  scales 
  smooth, 
  not 
  serrated. 
  

  

  The 
  outline-restoration 
  published 
  by 
  Bronn 
  (loc. 
  cit. 
  pi. 
  ii. 
  fig. 
  2), 
  

   being 
  founded 
  on 
  a 
  distorted 
  specimen, 
  is 
  too 
  stout 
  and 
  with 
  a 
  

   relatively 
  too 
  large 
  head. 
  The 
  confusion 
  of 
  Peltopleurus 
  with 
  

   Pholidopleurus 
  is 
  the 
  source 
  of 
  the 
  pelvic 
  fins 
  shown. 
  

  

  Form. 
  6f 
  Loc. 
  Upper 
  Trias 
  : 
  Raibl, 
  Carinthia, 
  and 
  Besano, 
  

   Lombardy. 
  

  

  P. 
  1099 
  C, 
  d. 
  Two 
  fine 
  specimens, 
  the 
  first 
  displaying 
  all 
  the 
  fins, 
  

   the 
  second 
  showing 
  the 
  small 
  conical 
  teeth 
  in 
  the 
  maxilla. 
  

  

  Egerton 
  Coll. 
  

  

  P. 
  3618, 
  P. 
  4409. 
  Three 
  fine 
  specimens, 
  the 
  third 
  vaguely 
  showing 
  

   the 
  axial 
  skeleton 
  of 
  the 
  trunk. 
  Enniskillen 
  Coll. 
  

  

  33062. 
  Four 
  more 
  imperfect 
  specimens. 
  Purchased, 
  1858. 
  

  

  