﻿284 
  ACTINOPTEKTGir. 
  

  

  forms, 
  however, 
  bear 
  more 
  resemblance 
  to 
  the 
  pharyngeal 
  teeth 
  of 
  

   certain 
  bony 
  fishes, 
  as 
  maintained 
  by 
  W. 
  Dames 
  (Zeitschr. 
  deutsch. 
  

   geol. 
  Ges. 
  vol. 
  xxxv. 
  1883, 
  p. 
  658). 
  

  

  Such 
  teeth 
  are 
  exhibited 
  in 
  the 
  front 
  of 
  the 
  mouth 
  of 
  a 
  specimen 
  

   of 
  Xenojpholis 
  carinatus 
  from 
  Mount 
  Lebanon, 
  in 
  the 
  Court 
  Museum, 
  

   Vienna 
  ; 
  and 
  the 
  following 
  specimens 
  are 
  preserved 
  in 
  the 
  Collec- 
  

   tion 
  : 
  — 
  

  

  P. 
  7460. 
  A 
  comparatively 
  large 
  tooth, 
  slightly 
  constricted 
  and 
  

   crimped 
  at 
  the 
  base 
  of 
  the 
  crown 
  ; 
  Chalk, 
  Lewes. 
  

  

  Presented 
  by 
  Rev, 
  T. 
  Wiltshire. 
  

  

  49956. 
  Smaller 
  tooth, 
  described 
  and 
  figured 
  in 
  Proc. 
  Geol. 
  Assoc, 
  

   vol. 
  x. 
  (1888), 
  p. 
  330, 
  pi. 
  i. 
  fig. 
  10 
  ; 
  Lower 
  Chalk, 
  Lewes. 
  

  

  C 
  apron 
  Coll. 
  

  

  P. 
  335. 
  Still 
  smaller 
  dental 
  crown 
  ; 
  Chalk, 
  Hart 
  Hill, 
  Charing, 
  

   Kent. 
  Harris 
  Coll. 
  

  

  The 
  following 
  Cretaceous 
  forms 
  of 
  these 
  prehensile 
  teeth 
  have 
  

   also 
  been 
  named 
  : 
  — 
  

  

  Ankistrodus 
  splendens, 
  L. 
  G. 
  de 
  Koninck, 
  Bull. 
  Acad. 
  Roy. 
  Sci. 
  

  

  Belg. 
  [2] 
  vol. 
  xxix. 
  (1870), 
  p. 
  78, 
  figs. 
  1-3.— 
  Upper 
  

  

  Senonian 
  ; 
  Meudon, 
  near 
  Paris. 
  [Geological 
  Museum, 
  

  

  University 
  of 
  Louvain.] 
  

   Ancistrodon 
  libycus, 
  W. 
  Dames, 
  Zeitschr. 
  deutsch. 
  geol. 
  Ges. 
  

  

  vol. 
  xxxv. 
  (1883), 
  p. 
  663, 
  pi. 
  xix. 
  figs. 
  6-8. 
  — 
  Senonian 
  ; 
  

  

  Gassr-Dachel, 
  Libyan 
  Desert. 
  [Palseontological 
  Museum, 
  

  

  Munich.] 
  

   Ancistrodon 
  mosensis, 
  W. 
  Dames, 
  ibid. 
  p. 
  662, 
  pi. 
  xix. 
  figs. 
  4, 
  5. 
  

  

  — 
  Senonian 
  ; 
  Aix-la-Chapelle 
  and 
  Maastricht. 
  

   Ancistrodon 
  teocanus, 
  W. 
  Dames, 
  ibid. 
  p. 
  664. 
  Ancistrodon 
  sp. 
  

  

  F. 
  Eoemer, 
  Kreidebild. 
  Texas 
  (1852), 
  p. 
  10, 
  pi. 
  i. 
  fig. 
  10.— 
  

  

  Senonian 
  ; 
  Texas. 
  [Geological 
  Museum, 
  University 
  of 
  

  

  Breslau.] 
  

  

  