﻿312 
  ACT1N0PTERYGII. 
  

  

  Heterolepidotus 
  pectoralis 
  (Bellotti). 
  

  

  1857. 
  Lepidotus 
  pectoralis, 
  C. 
  Bellotti, 
  in 
  A. 
  Stoppani, 
  Studii 
  Geol. 
  e 
  

  

  Paleunt. 
  Lombardia, 
  p. 
  420. 
  

   1889. 
  Heterolepidotus 
  pectoralis, 
  W. 
  Deecke, 
  Palaeontogr. 
  vol. 
  xxxv. 
  

  

  p. 
  114, 
  pi. 
  vi. 
  fig 
  1 
  . 
  8, 
  pi. 
  vii. 
  fig. 
  10. 
  

  

  Type. 
  Imperfect 
  fish 
  ; 
  Milan 
  Museum. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*16. 
  Length 
  of 
  head 
  with 
  

   opercular 
  apparatus 
  exceeding 
  the 
  maximum 
  depth 
  of 
  the 
  trunk 
  and 
  

   occupying 
  one-third 
  of 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  width 
  of 
  caudal 
  

   pedicle 
  contained 
  about 
  two-and-a-quarter 
  times 
  in 
  the 
  maximum 
  

   depth 
  of 
  the 
  trunk. 
  External 
  bones 
  conspicuously 
  ornamented 
  with 
  

   granulations, 
  which 
  are 
  sometimes 
  fused 
  into 
  rugae 
  ; 
  scales 
  smooth, 
  

   those 
  of 
  the 
  anterior 
  part 
  of 
  the 
  trunk 
  finely 
  serrated 
  ; 
  principal 
  

   flank-scales 
  about 
  as 
  deep 
  as 
  broad. 
  {Deecke.) 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Trias 
  : 
  Perledo, 
  Como. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Heterolepidotus 
  serratus 
  (Bellotti). 
  

  

  1857.- 
  Lepidotus 
  serratus, 
  C. 
  Bellotti, 
  in 
  A. 
  Stoppani, 
  Studii 
  Geol. 
  e 
  

  

  Paleont. 
  Lombardia, 
  p. 
  419. 
  

   1889. 
  Heterolepidotus 
  serratus, 
  W. 
  Deecke, 
  Palaeontogr. 
  vol. 
  xxxv. 
  

  

  p. 
  116, 
  pi. 
  vi. 
  fig. 
  2. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Milan 
  Museum. 
  

  

  A 
  species 
  closely 
  related 
  to 
  the 
  preceding 
  but 
  somewhat 
  more 
  

   elongated, 
  and 
  the 
  ornament 
  of 
  the 
  external 
  bones 
  entirely 
  tuber- 
  

   cular, 
  not 
  rugose. 
  Head 
  with 
  opercular 
  apparatus 
  occupying 
  some- 
  

   what 
  more 
  than 
  one-quarter 
  of 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  width 
  

   of 
  caudal 
  pedicle 
  contained 
  about 
  two-and-a-half 
  times 
  in 
  the 
  

   maximum 
  depth 
  of 
  the 
  trunk. 
  {Deecke.) 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Trias 
  ; 
  Perledo, 
  Como. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Heterolepidotus 
  (?) 
  radiato-punctatus 
  (Agassiz). 
  

  

  1844. 
  Pholidophorus 
  radiato-punctatus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol. 
  ii. 
  

  

  pt. 
  i. 
  p. 
  287. 
  

   1844. 
  Pholidophorus 
  maximus, 
  L. 
  Agassiz, 
  ibid. 
  p. 
  287. 
  

  

  Type. 
  Remains 
  of 
  head 
  and 
  trunk 
  ; 
  British 
  Museum. 
  

  

  A 
  large 
  species 
  characterized 
  by 
  comparatively 
  robust 
  scales, 
  

   which 
  are 
  not 
  much 
  deeper 
  than 
  broad 
  on 
  the 
  flank, 
  and 
  are 
  all 
  

   ornamented 
  with 
  small 
  tubercles 
  of 
  ganoine, 
  usually 
  more 
  or 
  less 
  

   elongated 
  and 
  closely 
  arranged 
  in 
  lines 
  radiating 
  from 
  the 
  anterior 
  

  

  