﻿PH0L1D0PH0EIDJE. 
  479 
  

  

  Thoracopterus 
  niederristi, 
  Bronn. 
  

  

  1858. 
  Thoracopterus 
  niederristi, 
  H. 
  G. 
  Bronn, 
  Neues 
  Jahrb. 
  p. 
  18, 
  

  

  pi. 
  iii. 
  

   1866. 
  Thoracopterus 
  niederristi, 
  R. 
  Kner, 
  Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  

  

  rnath.-naturw. 
  CI. 
  vol. 
  liii. 
  pt. 
  i. 
  p. 
  170, 
  pi. 
  iii. 
  

  

  Type. 
  Imperfect 
  fish 
  ; 
  counterpart 
  in 
  British 
  Museum. 
  

  

  The 
  type 
  species, 
  attaining 
  a 
  length 
  of 
  about 
  0*11. 
  Length 
  of 
  

   head 
  with 
  opercular 
  apparatus 
  probably 
  exceeding 
  the 
  maximum 
  

   depth 
  of 
  the 
  trunk, 
  and 
  contained 
  four 
  times 
  in 
  the 
  total 
  length 
  of 
  

   the 
  fish. 
  External 
  bones 
  and 
  postclavicular 
  scales 
  ornamented 
  with 
  

   close 
  vermiculating 
  rugse 
  of 
  ganoine 
  ; 
  mandibular 
  teeth 
  minute 
  and 
  

   stout. 
  Pectoral 
  fin-rays 
  at 
  least 
  two-thirds 
  as 
  long 
  as 
  the 
  trunk, 
  

   the 
  broad 
  bases 
  longitudinally 
  striated 
  ; 
  origin 
  of 
  dorsal 
  fin 
  three 
  

   times 
  as 
  remote 
  from 
  the 
  occiput 
  as 
  from 
  the 
  base 
  of 
  the 
  caudal 
  fin 
  ; 
  

   anal 
  much 
  larger 
  than 
  the 
  dorsal 
  fin. 
  Anterior 
  dorsal 
  scales 
  rugose, 
  

   these 
  and 
  the 
  others 
  of 
  the 
  flank 
  of 
  the 
  abdominal 
  region 
  delicately 
  

   crimped 
  and 
  serrated 
  on 
  the 
  hinder 
  margin 
  ; 
  most 
  of 
  the 
  caudal 
  

   scales 
  smooth 
  and 
  not 
  serrated 
  ; 
  four 
  series 
  of 
  deepened 
  scales 
  on 
  

   the 
  flank 
  of 
  the 
  abdominal 
  region. 
  

  

  Form. 
  4' 
  Loc. 
  Upper 
  Trias: 
  Baibl, 
  Carinthia. 
  

  

  P. 
  1098. 
  Counterpart 
  of 
  type 
  specimen 
  ; 
  Baibl. 
  The 
  minute 
  teeth 
  

   are 
  distinct 
  in 
  a 
  fragment 
  of 
  the 
  mandible 
  ; 
  the 
  operculum 
  

   is 
  only 
  shown 
  by 
  an 
  imperfect 
  impression 
  of 
  its 
  inner 
  face. 
  

   There 
  are 
  no 
  traces 
  of 
  the 
  pelvic 
  fins. 
  Egerton 
  Coll. 
  

  

  Another 
  imperfect 
  fish 
  from 
  Baibl, 
  very 
  doubtfully 
  distinct 
  from 
  

   Thoracopterus, 
  but 
  said 
  to 
  differ 
  in 
  wanting 
  the 
  pelvic 
  fins 
  (only 
  

   one 
  specimen 
  examined), 
  is 
  named 
  Pterygopterus 
  apus 
  by 
  B. 
  Kner, 
  

   Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  math.-naturw. 
  CI. 
  vol. 
  lv. 
  pt. 
  i. 
  (1867), 
  

   p. 
  722, 
  with 
  plate. 
  The 
  pectoral 
  fins 
  from 
  the 
  Upper 
  Trias 
  of 
  

   Giffoni, 
  Province 
  of 
  Salerno, 
  Italy, 
  erroneously 
  referred 
  to 
  Urocomus 
  

   picenus 
  by 
  0. 
  G. 
  Costa, 
  Atti 
  B. 
  Accad. 
  Sci. 
  Napoli, 
  vol. 
  vi. 
  Append. 
  

   (1862), 
  p. 
  32, 
  pi. 
  v. 
  fig. 
  2, 
  are 
  doubtfully 
  ascribed 
  to 
  Ptery- 
  

   gopterus 
  by 
  F. 
  Bassani, 
  Mem. 
  Soc. 
  Ital. 
  Sci. 
  [3] 
  vol. 
  ix. 
  no. 
  3 
  (1892), 
  

   p. 
  10. 
  

  

  Genus 
  PHOLIDOPLEURUS, 
  Bronn. 
  

  

  [Neues 
  Jahrb. 
  1858, 
  p. 
  17.] 
  

  

  Trunk 
  elongate-fusiform 
  and 
  upper 
  caudal 
  lobe 
  inconspicuous. 
  

   External 
  bones 
  nearly 
  or 
  quite 
  smooth, 
  with 
  very 
  thin 
  ganoine 
  ; 
  

   maxilla 
  deepened 
  behind, 
  scarcely 
  arched 
  ; 
  teeth 
  minute. 
  Yertebral 
  

  

  