﻿14 
  ACTINOPTERYGII. 
  

  

  1865. 
  Saurichthys 
  tenuirostris, 
  H. 
  Eck, 
  Form. 
  bunt.S 
  mdst. 
  u. 
  Muschelk. 
  

  

  Oberschlesien, 
  p. 
  121. 
  

   1873. 
  Stylorhynchus 
  tenuirostris, 
  K. 
  Martin, 
  Zjitschr. 
  deutsch. 
  geol. 
  

  

  Ges. 
  vol. 
  xxv. 
  p. 
  725, 
  pi. 
  xxii. 
  fig. 
  14. 
  

   1838. 
  Saurichthys 
  tenuirostris, 
  K. 
  A. 
  von 
  Zittel, 
  Handb. 
  Paloeont. 
  

  

  vol. 
  iii. 
  p. 
  266. 
  

   1892. 
  Saurichthys 
  tenuirostris, 
  0. 
  M. 
  Reis, 
  Geogn. 
  Jahresh. 
  1891, 
  

  

  p. 
  151, 
  (?) 
  fig. 
  4. 
  

  

  Type. 
  Cranium; 
  Palseontological 
  Museum, 
  Munich. 
  

  

  The 
  type 
  species 
  of 
  the 
  so-called 
  Saurorhynshus 
  (Miinster 
  MS.) 
  

   and 
  Stylorhynchus, 
  of 
  small 
  size 
  and 
  with 
  very 
  slender 
  snout, 
  the 
  

   head 
  attaining 
  a 
  length 
  of 
  about 
  0*06 
  and 
  its 
  maximum 
  breadth 
  

   O'Ol. 
  The 
  external 
  ornament 
  of 
  the 
  cranial 
  roof 
  consists 
  chiefly 
  of 
  

   tubercles 
  . 
  

  

  Form. 
  Sf 
  Lofl. 
  Muschelkalk 
  : 
  Germany. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Belonorhynchus 
  acutus 
  (Agassiz). 
  

   [Plate 
  II. 
  fig. 
  1.] 
  

  

  1844. 
  Belonostomus 
  acutus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol. 
  ii. 
  pt. 
  ii. 
  p. 
  142, 
  

  

  pi. 
  xlvii 
  a. 
  figs. 
  3, 
  4. 
  

   1844. 
  Belonostomus 
  anninyice, 
  L. 
  Agassiz, 
  ibid. 
  p. 
  143 
  (name 
  only). 
  

  

  [Head 
  ; 
  British 
  Museum.] 
  

   1844. 
  Belonostomus 
  tenellus, 
  L. 
  Agassiz, 
  ibid. 
  p. 
  143 
  (name 
  only). 
  

  

  [Mandibular 
  symphysis 
  ; 
  British 
  Museum.] 
  

   1858. 
  Belonorhynchus 
  (?) 
  acutus 
  and 
  B. 
  (?) 
  anninyice, 
  H. 
  G. 
  Bronn, 
  

  

  Neues 
  Jahrb. 
  p. 
  12. 
  

   1876. 
  Belonostomus 
  acutus, 
  J. 
  F. 
  Blake, 
  in 
  Tate 
  and 
  Blake, 
  Yorkshire 
  

  

  Lias, 
  p. 
  259.- 
  

  

  1887. 
  Belonorhynchus 
  acutus, 
  K. 
  A. 
  von 
  Zittel, 
  Handb. 
  Palaeont. 
  

   vol. 
  iii. 
  p. 
  222. 
  

  

  1888. 
  Belonorhynchus 
  anninyice, 
  A. 
  S. 
  Woodward, 
  Ann. 
  Mag. 
  Nat. 
  

   Hist. 
  [6] 
  vol. 
  i. 
  p. 
  355, 
  and 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xliv. 
  

   p. 
  147, 
  pi. 
  vii. 
  fig. 
  14. 
  

  

  1890. 
  Belonorhynchus 
  acutus, 
  Woodward 
  and 
  Sherborn, 
  Catal. 
  Brit. 
  

  

  Foss. 
  Vertebrata, 
  p. 
  16. 
  

   1892. 
  Saurorhynchus 
  acutus, 
  O. 
  M. 
  Beis, 
  Geogn. 
  Jahresh. 
  1891, 
  p. 
  145 
  

  

  (in 
  part). 
  

  

  Type. 
  Imperfect 
  cranium 
  ; 
  British 
  Museum. 
  

  

  The 
  type 
  species 
  of 
  the 
  so-called 
  Saurorhynclius, 
  of 
  moderate 
  

   size, 
  the 
  head 
  attaining 
  a 
  length 
  of 
  about 
  0*15. 
  Head 
  from 
  four 
  

   and 
  a 
  half 
  to 
  five 
  times 
  as 
  long 
  as 
  its 
  maximum 
  depth 
  ; 
  distance 
  

   between 
  the 
  orbit 
  and 
  the 
  occiput 
  considerably 
  exceeding 
  the 
  maxi- 
  

   mum 
  depth 
  of 
  the 
  mandible, 
  and 
  the 
  angular 
  bone 
  of 
  the 
  latter 
  

   much 
  truncated 
  though 
  gently 
  rounded 
  postero-inferiorly 
  ; 
  dentition 
  

  

  