﻿EUGNATHIDjE. 
  311 
  

  

  Heterolepidotus 
  striatus 
  (Agassiz). 
  

  

  [Plate 
  VIII. 
  fig. 
  3.] 
  

  

  1837-44. 
  Semionotus 
  striatus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol. 
  ii. 
  pt. 
  i. 
  

   p. 
  231, 
  pi. 
  xxvii 
  a. 
  figs. 
  6, 
  7. 
  

  

  Type. 
  Pish 
  wanting 
  head 
  and 
  tail 
  ; 
  British 
  Museum. 
  

  

  A 
  small 
  imperfectly 
  known 
  species 
  of 
  robust 
  proportions. 
  Head 
  

   and 
  opercular 
  bones 
  ornamented 
  with 
  closely 
  arranged 
  coarse 
  rugae. 
  

   Scales 
  remarkably 
  smooth, 
  those 
  on 
  the 
  anterior 
  part 
  of 
  the 
  body 
  

   with 
  few 
  serrations. 
  

  

  Form. 
  &f 
  Loc. 
  Upper 
  Trias 
  : 
  Tyrol. 
  

  

  P. 
  3621. 
  The 
  type 
  specimen, 
  described 
  and 
  figured 
  by 
  Agassiz, 
  loc. 
  

   cit. 
  ; 
  Seefeld. 
  The 
  original 
  drawing 
  of 
  the 
  scales 
  is 
  very 
  

   inaccurate, 
  and 
  a 
  new 
  figure 
  is 
  thus 
  given 
  in 
  PI. 
  VIII. 
  

   fig. 
  3. 
  The 
  narrow 
  ventral 
  scales 
  are 
  well 
  shown, 
  and 
  

   quite 
  distinct 
  in 
  form 
  from 
  those 
  of 
  the 
  specimens 
  described 
  

   by 
  Kner 
  as 
  referable 
  to 
  this 
  species 
  (see 
  p. 
  316). 
  The 
  

   position 
  of 
  the 
  pelvic 
  fius 
  is 
  not 
  indicated, 
  but 
  they 
  would 
  

   probably 
  arise 
  immediately 
  in 
  advance 
  of 
  the 
  dorsal 
  fin. 
  

  

  EnnisTcillen 
  Coll. 
  

  

  P. 
  3621 
  a. 
  A 
  more 
  imperfect 
  specimen, 
  apparently 
  of 
  this 
  species 
  ; 
  

   Seefeld. 
  EnnisTcillen 
  Coll. 
  

  

  Heterolepidotus 
  cephalus 
  (Kner). 
  

  

  1866. 
  Pholidophorus 
  cephalus, 
  R. 
  Kner, 
  Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  

   math.-naturw. 
  CI. 
  vol. 
  liv. 
  pt. 
  i. 
  p. 
  325, 
  pi. 
  iv. 
  fig. 
  2. 
  

  

  1889. 
  Pholidophorus 
  cephalus, 
  W. 
  Deecke, 
  Palasontogr. 
  vol. 
  xxxv. 
  

   p. 
  135, 
  pi. 
  yii. 
  fig. 
  4. 
  

  

  1892. 
  Pholidophorus 
  cephalus, 
  F. 
  Bassani, 
  Mem. 
  Soc. 
  Ital. 
  Sci. 
  [3] 
  

   vol. 
  ix. 
  no. 
  3, 
  pp. 
  8, 
  23. 
  

  

  Type. 
  Nearly 
  complete 
  fish. 
  

  

  A 
  very 
  small 
  species. 
  Length 
  of 
  head 
  with 
  opercular 
  apparatus 
  

   equalling 
  the 
  maximum 
  depth 
  of 
  the 
  trunk, 
  and 
  contained 
  about 
  

   three-and-a-half 
  times 
  in 
  the 
  total 
  length 
  of 
  the 
  fish. 
  Opercular 
  

   apparatus 
  [probably 
  also 
  head] 
  ornamented 
  with 
  closely 
  arranged, 
  

   coarse 
  rugas 
  ; 
  operculum 
  much 
  deeper 
  than 
  broad. 
  Dorsal 
  and 
  anal 
  

   fins 
  deeper 
  than 
  long, 
  and 
  the 
  pelvic 
  fins 
  arising 
  in 
  advance 
  of 
  the 
  

   origin 
  of 
  the 
  former. 
  Anterior 
  scales 
  coarsely 
  serrated. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Trias 
  : 
  Tyrol, 
  Lombardy, 
  and 
  Salerno. 
  

  

  21383. 
  Specimen 
  agreeing 
  almost 
  precisely 
  with 
  the 
  figure 
  given 
  by 
  

   Kner; 
  Seefeld. 
  Purchased, 
  1847. 
  

  

  