﻿434 
  ACTINOPTERYGII. 
  

  

  teeth 
  on 
  its 
  outer 
  margin 
  ; 
  the 
  dentary 
  has 
  an 
  irregular 
  

   series 
  of 
  large 
  conical 
  teeth 
  in 
  its 
  hinder 
  two-thirds, 
  very 
  

   small 
  closely-set 
  teeth 
  in 
  front. 
  Purchased, 
  1890. 
  

  

  P. 
  6175 
  a. 
  Laterally 
  compressed 
  rostrum 
  and 
  presymphysial 
  bone, 
  

   probably 
  associated 
  ; 
  Weymouth. 
  Purchased, 
  1890. 
  

  

  41180, 
  41229, 
  41401, 
  42368, 
  43566, 
  44190. 
  Twelve 
  fragments 
  of 
  

   cranium, 
  variously 
  crushed 
  ; 
  Weymouth. 
  

  

  Purchased, 
  1868-73. 
  

  

  43564. 
  Complete 
  presymphysial 
  bone 
  0*04 
  in 
  length, 
  and 
  four 
  times 
  

   as 
  long 
  as 
  its 
  maximum 
  depth 
  ; 
  Weymouth. 
  

  

  Purchased, 
  1872. 
  

  

  41229 
  a, 
  41401 
  a, 
  41879, 
  42365, 
  43027, 
  43565, 
  44189, 
  P. 
  6175 
  b. 
  

  

  About 
  twenty 
  specimens 
  of 
  the 
  presymphysial 
  bone, 
  more 
  

   or 
  less 
  imperfect 
  and 
  of 
  various 
  sizes 
  ; 
  Weymouth. 
  

  

  Purchased, 
  1868, 
  1869, 
  to 
  1890. 
  

  

  Bejonostomus 
  crassirostris, 
  Costa. 
  

  

  1853. 
  Belonostomus 
  crassirosti'is, 
  O. 
  G. 
  Costa, 
  Atti 
  Accad. 
  Pontan. 
  

  

  vol. 
  vii. 
  p. 
  29, 
  pi. 
  ii. 
  figs. 
  1, 
  2. 
  

   1853. 
  Belonostomus 
  gracilis, 
  O. 
  G. 
  Costa, 
  ibid. 
  p. 
  31, 
  pi. 
  ii. 
  fig. 
  3. 
  

  

  [Portion 
  of 
  rostrum 
  ; 
  Geological 
  Museum, 
  University 
  of 
  Naples.] 
  

  

  Type. 
  Fish 
  wanting 
  pelvic 
  fins 
  ; 
  Geological 
  Museum, 
  University 
  

   of 
  Naples. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  ? 
  6, 
  with 
  relatively 
  small 
  head 
  

   occupying 
  about 
  one-sixth 
  of 
  the 
  total 
  length. 
  Scales 
  smooth, 
  and 
  

   those 
  of 
  the 
  lateral 
  line 
  much 
  exceeding 
  in 
  depth 
  the 
  series 
  below. 
  

  

  Form. 
  Sf 
  Loc. 
  Cretaceous 
  : 
  Pietraroja, 
  Province 
  of 
  Benevento, 
  

   Italy. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Belonostomus 
  lesinaensis, 
  Bassani. 
  

  

  (?) 
  1867. 
  Hemirhynchus 
  heckeli, 
  R. 
  Kner, 
  Sitzungsb. 
  k. 
  Akad. 
  Wiss., 
  

  

  math.-naturw. 
  CI. 
  vol. 
  lvi. 
  pt. 
  i. 
  p. 
  182. 
  [Head; 
  Museum 
  of 
  

  

  Imperial 
  Geological 
  Survey, 
  Vienna.] 
  

   (?) 
  1867. 
  Hemirhynchus 
  comenianus, 
  R. 
  Kner, 
  ibid. 
  p. 
  182. 
  [Head 
  ; 
  

  

  Museum 
  of 
  Imperial 
  Geological 
  Survey, 
  Vienna.] 
  

   1879. 
  Belonostomus 
  crassirostris, 
  F. 
  Bassani 
  (errore), 
  Verhandl. 
  k.-k. 
  

  

  geol. 
  Reichsanst. 
  p. 
  166. 
  

   1882. 
  Belonostomus 
  lesinaensis, 
  F. 
  Bassani, 
  Denkschr. 
  k. 
  Akad. 
  Wiss., 
  

  

  math.-naturw. 
  CI. 
  vol. 
  xlv. 
  p. 
  198, 
  pi. 
  i. 
  fig. 
  10. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Museum 
  of 
  Imperial 
  Geological 
  

   Survey, 
  Vienna. 
  

  

  