﻿104 
  ACTINOPTERYGII. 
  

  

  (?) 
  1863. 
  Plesiodus 
  pustulosus, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wise., 
  

  

  math.-phys. 
  CI. 
  vol. 
  ix. 
  p. 
  638 
  ; 
  pi. 
  vii. 
  

   1867. 
  Lepidotus 
  palliatus, 
  H. 
  E. 
  Sauvage, 
  Catal. 
  Poiss. 
  Form. 
  Second. 
  

  

  Boulonnais 
  (Mem. 
  Soc. 
  Acad. 
  Boulogne-sur-Mer, 
  vol. 
  ii.), 
  p. 
  19, 
  

  

  pi. 
  i. 
  figs. 
  19-23. 
  

   1867. 
  Lepidotus 
  radiatus, 
  H, 
  E. 
  Sauvage, 
  ibid. 
  p. 
  15 
  (in 
  part). 
  

   1875. 
  Lepidotus 
  giganteus, 
  K. 
  Fricke, 
  Palseontogr. 
  vol. 
  xxii. 
  p. 
  381, 
  

  

  pi. 
  xxi. 
  figs. 
  7-9. 
  

   1877. 
  Lepidotus 
  palliatus, 
  H. 
  E. 
  Sauvage, 
  Mem. 
  Soc. 
  Geol. 
  France, 
  [3] 
  

  

  vol. 
  i. 
  no. 
  1, 
  p. 
  18, 
  pi. 
  i. 
  fig. 
  1, 
  pi. 
  ii. 
  

   1880. 
  Lepidotus 
  palliatus, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Geol. 
  France, 
  [3] 
  

  

  vol. 
  viii. 
  pp. 
  458, 
  524, 
  pi. 
  xiii. 
  fig. 
  1. 
  

   1880. 
  Lepidotus 
  radiatus, 
  H. 
  E. 
  Sauvage, 
  ibid. 
  p. 
  524. 
  

   (?) 
  1885. 
  Lepidotus 
  palliatus 
  F. 
  Bassani, 
  Atti 
  Soc. 
  Ital. 
  Sci. 
  Nat. 
  

  

  vol. 
  xxviii. 
  p. 
  157, 
  pi. 
  ii. 
  a. 
  figs. 
  14-16. 
  

  

  Type. 
  Detached 
  scales 
  British 
  Museum. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  2 
  metres. 
  Trunk 
  very 
  

   robust, 
  and 
  head 
  with 
  opercular 
  apparatus 
  occupying 
  somewhat 
  less 
  

   than 
  one-quarter 
  of 
  the 
  total 
  length 
  of 
  the 
  fish. 
  Maximum 
  width 
  

   of 
  operculum 
  two-thirds 
  as 
  great 
  as 
  its 
  depth, 
  and 
  equalling 
  about 
  

   one-third 
  the 
  length 
  of 
  the 
  head. 
  External 
  bones 
  more 
  or 
  less 
  

   rugose 
  or 
  tuberculated 
  ; 
  mandibular 
  symphysis 
  very 
  robust, 
  the 
  

   dentary 
  bone 
  being 
  much 
  horizontally 
  extended 
  to 
  support 
  the 
  large 
  

   dentigerous 
  splenial. 
  All 
  the 
  teeth 
  very 
  short 
  and 
  stout 
  and 
  smooth, 
  

   the 
  inner 
  and 
  larger 
  ones 
  with 
  gently 
  rounded 
  crown, 
  the 
  outer 
  

   teeth 
  more 
  or 
  less 
  acuminate 
  ; 
  splenial 
  teeth 
  in 
  six 
  or 
  seven 
  irregular 
  

   concentric 
  series, 
  increasing 
  in 
  size 
  within 
  : 
  pterygopalatine 
  teeth 
  

   in 
  four 
  or 
  five 
  longitudinal 
  series, 
  increasing 
  in 
  size 
  within 
  ; 
  vomerine 
  

   dentition 
  increasing 
  in 
  size 
  backwards, 
  the 
  anterior 
  teeth 
  very 
  

   irregular, 
  in 
  about 
  four 
  or 
  five 
  longitudinal 
  series, 
  the 
  largest 
  

   posterior 
  teeth 
  comprising 
  three 
  successive 
  pairs. 
  Fin-fulcra 
  very 
  

   large 
  ; 
  pelvic 
  fins 
  arising 
  midway 
  between 
  the 
  pectorals 
  and 
  the 
  

   anal 
  ; 
  dorsal 
  fin 
  remote, 
  arising 
  considerably 
  behind 
  the 
  pelvic 
  pair 
  ; 
  

   anal 
  fin 
  arising 
  opposite 
  the 
  hinder 
  extremity 
  of 
  the 
  dorsal. 
  The 
  

   enamel 
  of 
  the 
  scales 
  comparatively 
  thin, 
  sometimes 
  disco 
  ntinuous, 
  

   sometimes 
  with 
  few 
  granulations 
  : 
  principal 
  flank-scales 
  with 
  a 
  few 
  

   broad 
  ridges 
  and 
  furrows 
  radiating 
  from 
  the 
  centre 
  to 
  the 
  hinder 
  

   border, 
  where 
  they 
  form 
  indentations. 
  

  

  In 
  this 
  definition, 
  the 
  statement 
  of 
  form 
  and 
  proportions 
  is 
  based 
  

   upon 
  the 
  first 
  specimen 
  mentioned 
  below. 
  The 
  characters 
  of 
  the 
  

   dentition 
  are 
  more 
  clearly 
  seen 
  in 
  the 
  French 
  specimens 
  described 
  

   by 
  Sauvage. 
  The 
  left 
  mandibular 
  dentition 
  is 
  shown 
  in 
  Mem. 
  Soc. 
  

   Geol. 
  France, 
  [3] 
  vol. 
  i. 
  no. 
  1, 
  pi. 
  i. 
  fig. 
  1, 
  and 
  the 
  vomerine 
  dentition, 
  

   ibid. 
  pi. 
  ii. 
  fig. 
  11. 
  The 
  left 
  pterygo-palatine 
  dentition 
  is 
  shown 
  

  

  