﻿172 
  ACTINOPTERTGII. 
  

  

  squamation 
  being 
  exhibited 
  almost 
  entirely 
  in 
  impression, 
  

   it 
  is 
  difficult 
  to 
  determine 
  with 
  certainty 
  whether 
  or 
  not 
  

   the 
  scales 
  are 
  serrated. 
  Sharp 
  Coll. 
  

  

  Ophiopsis 
  lepturus 
  (Bellotti). 
  

  

  1857. 
  Pholidophorus 
  lepturus, 
  C. 
  Bellotti, 
  in 
  A. 
  Stoppani, 
  Studii 
  GeoL 
  

  

  e 
  Paleont. 
  Lombardia, 
  p. 
  429. 
  

   1889. 
  Ophiopsis 
  lepttirus, 
  W. 
  Deecke, 
  Palaeontogr. 
  vol. 
  xxxv. 
  p. 
  122, 
  

  

  pi. 
  vi. 
  fig. 
  4. 
  

  

  Type. 
  Nearly 
  complete 
  fish. 
  

  

  A 
  small 
  species, 
  about 
  0*08 
  in 
  length, 
  differing 
  from 
  the 
  typical 
  

   forms 
  in 
  the 
  prominence 
  of 
  the 
  upper 
  caudal 
  lobe 
  and 
  the 
  absence 
  

   of 
  vertebral 
  rings. 
  Length 
  of 
  head 
  with 
  opercular 
  apparatus 
  ex- 
  

   ceeding 
  the 
  maximum 
  depth 
  of 
  the 
  trunk 
  and 
  contained 
  about 
  four 
  

   times 
  in 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  maximum 
  depth 
  of 
  trunk 
  

   twice 
  as 
  great 
  as 
  the 
  width 
  of 
  the 
  caudal 
  pedicle. 
  Dorsal 
  fin 
  

   fringed 
  with 
  conspicuous 
  fulcra, 
  comprising 
  15 
  rays, 
  arising 
  imme- 
  

   diately 
  behind 
  the 
  anterior 
  third 
  of 
  the 
  trunk 
  and 
  occupying 
  about 
  

   half 
  of 
  the 
  back. 
  Scales 
  relatively 
  small, 
  in 
  from 
  42 
  to 
  44 
  vertical 
  

   series. 
  

  

  Specimens 
  from 
  the 
  Senckenberg 
  Museum, 
  Frankfurt, 
  are 
  de- 
  

   scribed 
  by 
  Deecke. 
  

  

  Form. 
  Sf 
  Log. 
  Muschelkalk 
  : 
  Perledo, 
  Como, 
  Italy. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  The 
  following 
  species 
  are 
  imperfectly 
  known 
  and 
  not 
  represented 
  

   in 
  the 
  Collection 
  : 
  — 
  

  

  Ophiopsis 
  altivelis, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  math.- 
  

   phys. 
  CI. 
  vol. 
  ix. 
  p. 
  657. 
  — 
  Lower 
  Kimmeridgian 
  (Litho- 
  

   graphic 
  Stone); 
  Kelheim, 
  Bavaria. 
  [Hinder 
  portion 
  of 
  

   fish 
  ; 
  Palseontological 
  Museum, 
  Munich.] 
  

  

  Ophiopsis 
  bellottii, 
  W. 
  Deecke, 
  Palaeontogr. 
  vol. 
  xxxv. 
  (1889), 
  

   p. 
  124 
  : 
  Nothosomus 
  bellottii, 
  F. 
  Bassani, 
  Atti 
  Soc. 
  ItaL 
  

   Sci. 
  Nat. 
  vol. 
  xxix. 
  (1886), 
  p. 
  37. 
  — 
  Keuper 
  ; 
  Besano 
  y 
  

   Lombardy 
  [Nearly 
  complete 
  fish 
  ; 
  Milan 
  Museum.] 
  

  

  Ophiopsis 
  macrodus, 
  Y. 
  Thiolliere, 
  Ann. 
  Soc. 
  Sci. 
  Phys. 
  & 
  Nat.- 
  

   Lyon, 
  [2] 
  vol. 
  iii. 
  (1850), 
  p. 
  148, 
  and 
  Poiss. 
  Foss. 
  Bugey, 
  

   pt. 
  ii. 
  (1873), 
  p. 
  19. 
  — 
  Lower 
  Kimmeridgian 
  (Lithographic 
  

   Stone) 
  ; 
  Cirin, 
  Ain, 
  France. 
  [Nearly 
  complete 
  fish 
  ; 
  

   Lyons 
  Museum.] 
  

  

  A 
  unique 
  specimen 
  from 
  the 
  Lithographic 
  Stone 
  of 
  Eichstadt, 
  

   Bavaria, 
  now 
  in 
  the 
  Dresden 
  Museum, 
  differs 
  only 
  from 
  the 
  typical 
  

  

  