﻿MACROSEMIID^:. 
  167 
  

  

  Ophiopsis 
  attenuata, 
  Wagner. 
  

   [Plate 
  III. 
  figs. 
  2, 
  3.] 
  

  

  1863. 
  Ophiopsis 
  attenuata, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  

  

  rnatk.-phys. 
  CI. 
  vol. 
  ix. 
  p. 
  655. 
  

   1873. 
  Ophiopsis 
  attenuata,~V 
  . 
  Thiolliere, 
  Poiss. 
  Foss. 
  Bugey, 
  pt. 
  ii. 
  p 
  . 
  19, 
  

  

  pi. 
  viii. 
  fig. 
  2. 
  

  

  Type. 
  Trunk 
  of 
  fish 
  ; 
  Palaeontological 
  Museum, 
  Munich. 
  

  

  Form 
  and 
  proportions 
  as 
  in 
  the 
  type 
  species, 
  but 
  the 
  fish 
  not 
  

   attaining 
  so 
  large 
  a 
  size. 
  External 
  head-bones 
  and 
  opercular 
  bones 
  

   smooth 
  ; 
  dorsal 
  fin-rays 
  mostly, 
  if 
  not 
  all, 
  undivided 
  ; 
  scales 
  deli- 
  

   cately 
  serrated, 
  not 
  pectinated. 
  

  

  Form. 
  6r 
  Log. 
  Lower 
  Kimmeridgian 
  (Lithographic 
  Stone) 
  : 
  Ba- 
  

   varia, 
  and 
  Ain, 
  France. 
  

  

  P. 
  1093. 
  Fish 
  of 
  the 
  form 
  ascribed 
  to 
  this 
  species 
  by 
  Thiolliere 
  ; 
  

   Cirin, 
  Ain, 
  France. 
  The 
  head 
  is 
  shown 
  only 
  in 
  impression, 
  

   and 
  the 
  dorsal 
  fin 
  is 
  very 
  imperfect. 
  Egerton 
  Coll. 
  

  

  P. 
  3609. 
  Small 
  individual 
  0*075 
  in 
  length, 
  wanting 
  the 
  anal 
  fin 
  

   shown 
  of 
  the 
  natural 
  size 
  in 
  PI. 
  III. 
  fig. 
  2 
  ; 
  Kelheim, 
  

   Bavaria. 
  The 
  opercular 
  elements 
  and 
  the 
  fins 
  are 
  espe- 
  

   cially 
  well 
  exhibited, 
  but 
  no 
  fulcra 
  are 
  preserved 
  except 
  

   at 
  the 
  base 
  of 
  the 
  caudal 
  fin. 
  EnniskiTlen 
  Coll. 
  

  

  P. 
  1090. 
  More 
  imperfect 
  example 
  of 
  a 
  similar 
  fish, 
  displaying 
  the 
  

   paired 
  fins 
  : 
  Kelheim. 
  The 
  outer 
  aspect 
  of 
  the 
  left 
  

   pectoral 
  fin 
  is 
  represented 
  of 
  three 
  times 
  the 
  natural 
  size 
  

   in 
  PI. 
  III. 
  fig. 
  3. 
  Several 
  elongated 
  basal 
  cartilages 
  

   (b) 
  are 
  indicated, 
  the 
  hindermost 
  one 
  being 
  much 
  larger 
  

   than 
  the 
  others, 
  with 
  its 
  upper 
  extremity 
  more 
  inclined 
  

   forwards. 
  Above 
  the 
  basal 
  lobe 
  is 
  an 
  enlarged 
  scale 
  (a?), 
  

   apparently 
  of 
  the 
  postclavicular 
  series 
  ; 
  and 
  the 
  fin-rays 
  

   are 
  about 
  12 
  or 
  13 
  in 
  number. 
  Egerton 
  Coll. 
  

  

  Ophiopsis 
  aequalis, 
  Wagner. 
  

  

  1863. 
  Ophiopsis 
  csqualis, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  math.- 
  

   phys. 
  CI. 
  vol. 
  ix. 
  p. 
  656. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Palaeontological 
  Museum, 
  Munich. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0-2. 
  Length 
  of 
  head 
  with 
  

  

  opercular 
  apparatus 
  exceeding 
  the 
  maximum 
  depth 
  of 
  the 
  trunk 
  

  

  and 
  contained 
  about 
  four-and-a-half 
  times 
  in 
  the 
  total 
  length 
  of 
  the 
  

  

  sh 
  ; 
  maximum 
  depth 
  of 
  trunk 
  twice 
  as 
  great 
  as 
  the 
  width 
  of 
  the 
  

  

  