﻿184 
  ACTINOPTERYGII. 
  

  

  pp. 
  10, 
  293, 
  pi. 
  xlix. 
  fig. 
  1. 
  [Imperfect 
  fish; 
  Palaeontological 
  

  

  Museum, 
  Munich.] 
  

   1844. 
  Propterus 
  microstomias, 
  L. 
  Agassiz, 
  ibid. 
  p. 
  296, 
  pi. 
  1. 
  figs. 
  6-8. 
  

   1851. 
  Notagogus 
  zieteni, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  math.- 
  

  

  phys. 
  01. 
  vol. 
  vi. 
  p. 
  65. 
  

   1851. 
  Propterus 
  microstomias, 
  A. 
  Wagner, 
  ibid. 
  p. 
  66. 
  

   1851. 
  Propterus 
  gracilis, 
  A. 
  Wagner, 
  ibid. 
  p. 
  68. 
  [Imperfect 
  fish 
  ; 
  

  

  Palaeontological 
  Museum, 
  Munich.] 
  

   1863. 
  Propterus 
  microstomus, 
  A. 
  Wagner, 
  be. 
  cit. 
  vol. 
  ix. 
  p. 
  645. 
  

  

  Type. 
  Fish, 
  wanting 
  part 
  of 
  caudal 
  fin; 
  Palaeontological 
  Museum, 
  

   Munich. 
  

  

  The 
  type 
  species, 
  attaining 
  a 
  length 
  of 
  about 
  0*09. 
  Length 
  of 
  

   head 
  with 
  opercular 
  apparatus 
  about 
  equalling 
  the 
  maximum 
  depth 
  

   of 
  the 
  trunk 
  and 
  contained 
  slightly 
  more 
  than 
  four 
  times 
  in 
  the 
  

   total 
  length 
  of 
  the 
  fish 
  ; 
  the 
  dorsal 
  border 
  gently 
  arched 
  and 
  the 
  

   maximum 
  depth 
  of 
  the 
  trunk 
  two-and-a-half 
  times 
  as 
  great 
  as 
  the 
  

   width 
  of 
  the 
  caudal 
  pedicle. 
  Length 
  of 
  the 
  first 
  dorsal 
  fin-ray 
  

   equalling 
  the 
  depth 
  of 
  the 
  trunk 
  at 
  its 
  point 
  of 
  insertion 
  ; 
  the 
  

   short-based 
  anal 
  fin 
  opposed 
  to 
  the 
  hindermost 
  rays 
  of 
  the 
  dorsal. 
  

   Scales 
  finely 
  denticulated. 
  

  

  Form. 
  Sf 
  Loc. 
  Lower 
  Kimmeridgian 
  (Lithographic 
  Stone) 
  : 
  Ba- 
  

   varia. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Propterus 
  speciosus, 
  Wagner. 
  

  

  [Plate 
  III. 
  fig. 
  5.] 
  

  

  1851. 
  Propterus 
  speciosus, 
  A.W 
  agner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  math.- 
  

  

  phys. 
  CI. 
  vol. 
  vi. 
  p. 
  67, 
  pi. 
  iv. 
  fig. 
  1. 
  

   1863. 
  Propterus 
  speciosus, 
  A. 
  Wagner, 
  loc. 
  cit. 
  vol. 
  ix. 
  p. 
  644. 
  

  

  Type. 
  Imperfect 
  fish 
  ; 
  Palaeontological 
  Museum, 
  Munich. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*15. 
  Proportions 
  as 
  in 
  

   the 
  type 
  species, 
  but 
  the 
  dorsal 
  border 
  irregularly 
  arched, 
  sharply 
  

   rising 
  above 
  the 
  occiput 
  and 
  bent 
  at 
  the 
  origin 
  of 
  the 
  dorsal 
  fin. 
  

   The 
  anterior 
  and 
  posterior 
  portions 
  of 
  the 
  dorsal 
  fin 
  comprising 
  

   about 
  ] 
  6 
  and 
  13 
  rays 
  respectively 
  ; 
  pelvic 
  fins 
  arising 
  well 
  in 
  

   advance 
  of 
  a 
  point 
  mid-way 
  between 
  the 
  pectorals 
  and 
  the 
  caudal 
  ; 
  

   the 
  short-based 
  anal 
  fin 
  opposed 
  to 
  the 
  hindermost 
  rays 
  of 
  the 
  

   dorsal. 
  Scales 
  finely 
  denticulated. 
  

  

  Form. 
  Sf 
  Loc. 
  Lower 
  Kimmeridgian 
  (Lithographic 
  Stone): 
  Bavaria. 
  

  

  37088, 
  37935. 
  Two 
  fine 
  specimens, 
  in 
  counterpart, 
  exhibiting 
  the 
  

   principal 
  characters 
  of 
  the 
  species 
  ; 
  Solenhofen. 
  The 
  first 
  

   is 
  shown 
  of 
  the 
  natural 
  size 
  in 
  PI. 
  III. 
  fig. 
  5. 
  

  

  Eaberlein 
  Coll. 
  

  

  