﻿PHOLIDOPHORID^. 
  481 
  

  

  Genus 
  PELTOPLEURUS, 
  Kner. 
  

  

  [Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  math.-naturw. 
  CI. 
  vol. 
  liii. 
  pt. 
  i. 
  

   1866, 
  p. 
  180.] 
  

  

  Trunk 
  deeply 
  fusiform. 
  External 
  bones 
  nearly 
  or 
  quite 
  smooth 
  ; 
  

   maxilla 
  more 
  or 
  less 
  arched 
  and 
  the 
  oral 
  margin 
  convex 
  ; 
  teeth 
  

   minute. 
  Pelvic 
  fins 
  well-developed, 
  but 
  smaller 
  than 
  the 
  pectorals 
  ; 
  

   dorsal 
  and 
  anal 
  fins 
  short-based, 
  the 
  former 
  arising 
  in 
  advance 
  of 
  

   the 
  latter 
  ; 
  caudal 
  fin 
  forked. 
  Scales 
  thick 
  and 
  moderately 
  over- 
  

   lapping 
  ; 
  those 
  of 
  the 
  middle 
  of 
  the 
  flank 
  excessively 
  deepened, 
  

   covering 
  nearly 
  the 
  whole 
  of 
  it 
  ; 
  dorsal 
  and 
  ventral 
  scales 
  few, 
  at 
  

   least 
  as 
  deep 
  as 
  broad. 
  Lateral 
  line 
  passing 
  directly 
  along 
  the 
  

   deepened 
  flank-scales, 
  inconspicuous. 
  

  

  Peltopleurus 
  splendens, 
  Kner. 
  

  

  1866. 
  Peltopleurus 
  sptendens, 
  R. 
  Kner, 
  Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  math.- 
  

  

  naturw. 
  CI. 
  vol. 
  liii. 
  pt. 
  i. 
  p. 
  180, 
  pi. 
  iv. 
  fig. 
  3. 
  

   1886. 
  Peltopleurus 
  splendens, 
  F. 
  Bassani, 
  Atti 
  Soc. 
  Ital. 
  Sci. 
  Nat. 
  

  

  vol. 
  xxix. 
  p. 
  36. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Museum 
  of 
  Imperial 
  Geological 
  

   Survey, 
  Vienna. 
  

  

  The 
  type 
  species, 
  attaining 
  a 
  length 
  of 
  about 
  0*06. 
  Length 
  of 
  

   head 
  with 
  opercular 
  apparatus 
  contained 
  nearly 
  five 
  times, 
  and 
  

   maximum 
  depth 
  of 
  trunk 
  about 
  three-and-a-half 
  times 
  in 
  the 
  total 
  

   length 
  of 
  the 
  fish 
  ; 
  width 
  of 
  caudal 
  pedicle 
  scarcely 
  exceeding 
  one- 
  

   third 
  the 
  depth 
  of 
  the 
  deepest 
  flank-scale. 
  Operculum 
  two-and-a- 
  

   half 
  times 
  as 
  deep 
  as 
  its 
  maximum 
  breadth. 
  Pelvic 
  fins 
  arising 
  at 
  

   the 
  middle 
  point 
  of 
  the 
  trunk, 
  the 
  anal 
  very 
  shortly 
  behind, 
  and 
  the 
  

   dorsal 
  opposed 
  to 
  the 
  intervening 
  space. 
  Scales 
  smooth, 
  not 
  serrated. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Trias 
  : 
  Baibl, 
  Carinthia, 
  and 
  Besano, 
  

   Lombardy. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Peltopleurus 
  kneri, 
  sp. 
  nov. 
  

  

  [Plate 
  XIV. 
  fig. 
  4.] 
  

  

  1858. 
  Pholidopleurus 
  typus 
  ?, 
  H. 
  G. 
  Bronn, 
  Neues 
  Jahrb. 
  p. 
  15, 
  pi. 
  i. 
  

   fig. 
  16. 
  

  

  Type. 
  Imperfect 
  fish 
  ; 
  British 
  Museum. 
  

  

  A 
  species 
  about 
  as 
  large 
  as 
  the 
  type, 
  but 
  with 
  smaller 
  head 
  and 
  

   more 
  elongated 
  trunk. 
  Length 
  of 
  head 
  with 
  opercular 
  apparatus 
  

   contained 
  six 
  times 
  in 
  the 
  total 
  length 
  of 
  the 
  fish. 
  Pelvic 
  fins 
  

   arising 
  much 
  in 
  advance 
  of 
  the 
  middle 
  point 
  of 
  the 
  trunk, 
  and 
  the 
  

  

  part 
  tit. 
  2 
  I 
  

  

  