﻿PYGtfODONTID^. 
  251 
  

  

  An 
  imperfectly 
  defined 
  species, 
  somewhat 
  smaller 
  than 
  the 
  type, 
  

   of 
  nearly 
  similar 
  proportions, 
  but 
  apparently 
  differing 
  in 
  its 
  rela- 
  

   tively 
  smaller 
  head. 
  Vertebral 
  axis 
  at 
  origin 
  of 
  dorsal 
  fin 
  slightly 
  

   above 
  the 
  middle 
  point 
  between 
  the 
  dorsal 
  and 
  ventral 
  borders 
  of 
  

   the 
  fish. 
  11 
  vertical 
  series 
  of 
  scales, 
  each 
  completed 
  at 
  the 
  ventral 
  

   margin 
  with 
  a 
  coarsely 
  serrated 
  ridge-scale. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Cretaceous 
  : 
  Island 
  of 
  Lesina, 
  Dalmatia 
  \ 
  

  

  P. 
  5947. 
  Small 
  specimen 
  0-115 
  in 
  length, 
  the 
  hinder 
  portion 
  

   obscured 
  by 
  a 
  thin 
  film 
  of 
  matrix. 
  Purchased, 
  1889. 
  

  

  Coelodus 
  rosthorni, 
  Heckel. 
  

  

  1856. 
  Coelodus 
  rosthornii, 
  J. 
  J. 
  Heckel, 
  Denkschr. 
  k. 
  Akad. 
  Wiss., 
  

   math.-naturw. 
  CI. 
  vol. 
  xi. 
  p. 
  213, 
  pi. 
  v. 
  

  

  Type. 
  Hinder 
  two-thirds 
  of 
  fish 
  ; 
  Eosthorn 
  Collection, 
  Klagenfurt. 
  

  

  An 
  imperfectly 
  defined 
  species, 
  attaining 
  a 
  length 
  of 
  at 
  least 
  05, 
  

   remarkable 
  for 
  its 
  much 
  elongated 
  trunk 
  and 
  the 
  great 
  inter- 
  

   digitating 
  expansion 
  of 
  its 
  neural 
  and 
  haemal 
  arches. 
  Vertebral 
  

   axis 
  at 
  origin 
  of 
  dorsal 
  fin 
  slightly 
  above 
  the 
  middle 
  point 
  between 
  

   the 
  dorsal 
  and 
  ventral 
  borders 
  of 
  the 
  fish. 
  Dorsal 
  fin 
  with 
  51, 
  and 
  

   anal 
  with 
  41 
  rays. 
  

  

  Form. 
  <$f 
  Loc. 
  Upper 
  Cretaceous 
  : 
  Comen, 
  Istria. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Coelodus 
  grandis 
  (Costa). 
  

  

  1853. 
  Pycnodus 
  grandis, 
  0. 
  G. 
  Costa, 
  Atti 
  Accad. 
  Pontan. 
  vol. 
  vii. 
  

   p. 
  20, 
  pi. 
  iii. 
  figs. 
  1-3, 
  5. 
  

  

  (?) 
  1853. 
  Pycnodus 
  achillis, 
  0. 
  G. 
  Costa, 
  ibid. 
  p. 
  23, 
  pi. 
  iii. 
  figs. 
  7-10. 
  

   [Splenial 
  dentition.] 
  

  

  1856. 
  Coelodus 
  grandis, 
  J. 
  J. 
  Heckel, 
  Denkschr. 
  k. 
  Akad. 
  Wiss., 
  math.- 
  

   naturw. 
  CI. 
  vol. 
  xi. 
  p. 
  203. 
  

  

  1882. 
  Coelodus 
  grandis, 
  F. 
  Bassani, 
  ibid. 
  vol. 
  xlv. 
  p. 
  232. 
  

  

  Type. 
  Nearly 
  complete 
  fish. 
  

  

  A 
  small, 
  imperfectly-known, 
  deep-bodied 
  species, 
  the 
  maximum 
  

   depth 
  of 
  the 
  trunk 
  considerably 
  exceeding 
  its 
  length 
  from 
  the 
  

   pectoral 
  arch 
  to 
  the 
  base 
  of 
  the 
  caudal 
  fin 
  ; 
  head 
  with 
  opercular 
  

   apparatus 
  occupying 
  about 
  one-quarter 
  of 
  the 
  total 
  length 
  of 
  the 
  

   fish. 
  Vertebral 
  axis 
  at 
  origin 
  of 
  dorsal 
  fin 
  very 
  slightly 
  above 
  the 
  

  

  1 
  A 
  fish 
  from 
  the 
  Cretaceous 
  of 
  Mt. 
  S. 
  Agata, 
  near 
  Gradisca, 
  Istria, 
  is 
  also 
  

   described 
  as 
  closely 
  related 
  to 
  this 
  species 
  by 
  F. 
  Bassani, 
  Jahrb. 
  k. 
  k. 
  geol. 
  

   Reichsanst. 
  vol. 
  xxxiv. 
  (1884), 
  p. 
  405, 
  pi. 
  ix. 
  fig. 
  3. 
  

  

  