﻿260 
  AOTINOPTERTGII. 
  

  

  from 
  a 
  single 
  locality 
  (Maastricht). 
  The 
  teeth 
  of 
  the 
  two 
  inner- 
  

   most 
  flanking 
  series 
  are 
  frequently 
  crowded 
  and 
  almost 
  triangular 
  

   in 
  form, 
  and 
  more 
  nearly 
  equal 
  in 
  size 
  than 
  shown 
  in 
  the 
  figure 
  

   quoted. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Cretaceous 
  (Danian 
  and 
  Senonian) 
  : 
  Holland, 
  

   Belgium, 
  and 
  France 
  \ 
  

  

  42991-93. 
  Portion 
  of 
  right 
  splenial 
  dentition 
  and 
  fragments 
  ; 
  Danian, 
  

   Maastricht, 
  Holland. 
  Van 
  Breda 
  Coll. 
  

  

  28717, 
  30752. 
  Detached 
  teeth, 
  probably 
  of 
  this 
  species 
  ; 
  Upper 
  

   Senonian, 
  Ciply, 
  near 
  Mons, 
  Belgium. 
  Purchased, 
  1853. 
  

  

  Anomoeodus 
  distans 
  (Coquand). 
  

  

  1860. 
  Pycnodus 
  distans, 
  H. 
  Coquand, 
  Descript. 
  Geol. 
  etc., 
  Depart. 
  

  

  Charente, 
  vol. 
  ii. 
  p. 
  97. 
  

   1880. 
  Pycnodus 
  distans 
  = 
  Pycnodus 
  cretaceus, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  

  

  Geol. 
  France, 
  [3] 
  vol. 
  viii. 
  p. 
  460, 
  pi. 
  xiv. 
  fig. 
  4. 
  

  

  Type. 
  Imperfect 
  splenial 
  dentition. 
  

  

  A 
  species 
  of 
  moderate 
  size, 
  known 
  only 
  by 
  part 
  of 
  the 
  splenial 
  

   dentition. 
  Teeth 
  of 
  the 
  principal 
  series 
  on 
  the 
  splenial 
  bone 
  much 
  

   arcuated 
  and 
  tapering 
  in 
  the 
  inner 
  half, 
  about 
  three 
  times 
  as 
  broad 
  

   as 
  long 
  ; 
  teeth 
  of 
  the 
  innermost 
  row 
  of 
  the 
  flanking 
  series 
  rouud 
  

   and 
  deeply 
  pitted, 
  smaller 
  than 
  those 
  of 
  the 
  next 
  adjoining 
  row, 
  

   which 
  are 
  almost 
  or 
  quite 
  smooth. 
  

  

  Form. 
  6f 
  Loc. 
  Senonian 
  : 
  Charente, 
  France. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Anomoeodus 
  angustus 
  (Agassiz). 
  

  

  1837-44. 
  Gyrodus 
  angustus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol. 
  ii. 
  pt. 
  ii. 
  

  

  pp. 
  235, 
  246, 
  pi. 
  lxvi. 
  a. 
  figs. 
  14, 
  15. 
  

   (?) 
  1839-44. 
  Pycnodus 
  cretaceus, 
  L. 
  Agassiz, 
  ibid. 
  p. 
  198, 
  pi. 
  lxxii. 
  a. 
  

  

  fig. 
  60. 
  [Splenial 
  teeth 
  ; 
  Manchester 
  Museum.] 
  

   1833-44. 
  Pycnodus 
  angustus, 
  L. 
  Agassiz, 
  ibid. 
  pt. 
  i. 
  p. 
  17, 
  pt. 
  ii. 
  p. 
  199 
  

  

  (name 
  only). 
  

  

  1844. 
  Pycnodus 
  elongatus, 
  L. 
  Agassiz, 
  ibid. 
  p. 
  199. 
  

  

  1845. 
  Gyrodus 
  angustus, 
  A. 
  E. 
  Reuss, 
  Verstein. 
  bohm, 
  Kreideform. 
  pt. 
  i. 
  

   p. 
  9, 
  pi. 
  iv. 
  fig. 
  55. 
  

  

  1845. 
  Pycnodus 
  rhomboidalis, 
  A. 
  E. 
  Reuss, 
  ibid. 
  pt. 
  i. 
  p. 
  10, 
  pi. 
  iv. 
  

   figs. 
  46-54. 
  [Detached 
  teeth.] 
  

  

  1 
  Fragments 
  of 
  dentition 
  from 
  the 
  Upper 
  Senonian 
  and 
  Danian 
  of 
  Scandi- 
  

   navia 
  are 
  also 
  ascribed 
  to 
  this 
  species 
  by 
  J. 
  W. 
  Davis, 
  Trans. 
  Roy. 
  Dublin 
  Soc. 
  

   [2] 
  vol. 
  iv. 
  (1890), 
  p. 
  416, 
  pi. 
  xlii. 
  figs. 
  16-18. 
  

  

  