﻿lepiolepid^;. 
  523 
  

  

  1844. 
  Thrissops 
  mesogaster, 
  L. 
  Agassiz, 
  ibid. 
  vol. 
  ii. 
  pt. 
  ii. 
  pp. 
  128, 
  293. 
  

  

  [Nearly 
  complete 
  fish 
  ; 
  Paleeontological 
  Museum, 
  Munich.] 
  

   1848. 
  Thrissops 
  gracilis, 
  C. 
  G. 
  Giebel, 
  Fauna 
  d. 
  Vorw., 
  Fische 
  ? 
  p. 
  151. 
  

  

  [Nearly 
  complete 
  fish 
  ; 
  Halle 
  University 
  Museum.] 
  

   1848. 
  Thrissops 
  salmoneus, 
  C. 
  G. 
  Giebel, 
  ibid. 
  p. 
  152. 
  

   1848. 
  Thrissops 
  mesogaster, 
  C. 
  G. 
  Giebel, 
  ibid. 
  p. 
  152. 
  

   1863. 
  Thrissops 
  salmoneus 
  (including 
  var. 
  angustus, 
  Minister, 
  MS.), 
  

  

  A. 
  Wagner, 
  Abb. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  math.-phys. 
  CI. 
  vol. 
  ix. 
  

  

  p. 
  735. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Museum 
  of 
  Natural 
  History, 
  Paris. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  035. 
  Head 
  with 
  opercular 
  

   apparatus 
  occupying 
  about 
  one-sixth 
  of 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  

   maximum 
  -depth 
  of 
  trunk 
  less 
  than 
  the 
  length 
  of 
  the 
  head 
  with 
  

   opercular 
  apparatus, 
  and 
  contained 
  about 
  five 
  times 
  in 
  the 
  length 
  of 
  

   the 
  trunk 
  from 
  the 
  pectoral 
  arch 
  to 
  the 
  base 
  of 
  the 
  caudal 
  fin. 
  

   Vertebra? 
  and 
  fins 
  as 
  in 
  the 
  type 
  species, 
  except 
  that 
  the 
  caudal 
  is 
  

   much 
  less 
  deeply 
  forked 
  and 
  with 
  broader 
  lobes. 
  

  

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

   varia. 
  

  

  37078. 
  Contorted 
  specimen 
  about 
  0*335 
  in 
  length, 
  in 
  counterpart 
  ; 
  

   Solenhofen. 
  Haberlein 
  Coll. 
  

  

  P. 
  3679. 
  Pine 
  specimen 
  somewhat 
  fractured, 
  0*27 
  in 
  length, 
  

   labelled 
  Thrissops 
  mesogaster 
  by 
  Agassiz 
  ; 
  Eichstadt. 
  

  

  Enniskillen 
  Coll. 
  

  

  37069. 
  Similar 
  specimen 
  0"25 
  in 
  length, 
  in 
  counterpart 
  ; 
  Solen- 
  

   hofen. 
  Haberlein 
  Coll. 
  

  

  P. 
  3682. 
  A 
  smaller, 
  more 
  imperfect 
  fish, 
  labelled 
  Thrissops 
  angustus 
  

   by 
  Miinster 
  ; 
  Xelheim. 
  Enniskillen 
  Coll. 
  

  

  Thrissops 
  clupeoides, 
  Winkler. 
  

  

  (?) 
  1854. 
  Thrissops 
  regleyi, 
  V. 
  Thiolliere, 
  Poiss. 
  Foss. 
  Bugey, 
  pt. 
  i. 
  pi. 
  x. 
  

  

  fig. 
  2 
  (figure 
  only). 
  

   1861. 
  Thrissop>s 
  clupeoides, 
  T. 
  C. 
  Winkler, 
  Descript. 
  Poiss. 
  Foss. 
  

  

  Solenhofen 
  (Natuurk. 
  Verhandl. 
  Holland. 
  Maatsch. 
  [2] 
  vol. 
  xiv.), 
  

  

  p. 
  21, 
  fig. 
  3. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Teyler 
  Museum, 
  Haarlem. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*25. 
  Head 
  with 
  opercular 
  

   apparatus 
  contained 
  between 
  five 
  and 
  five-and-a-half 
  times 
  in 
  the 
  

   total 
  length 
  of 
  the 
  fish 
  ; 
  maximum 
  depth 
  of 
  trunk 
  equalling 
  the 
  

   length 
  of 
  the 
  head 
  with 
  opercular 
  apparatus, 
  contained 
  between 
  

  

  