﻿pycnodontid^;. 
  263 
  

  

  Anomceodus 
  willetti, 
  A. 
  S. 
  Woodward. 
  

  

  1893. 
  Anomceodus 
  willetti, 
  A. 
  S. 
  Woodward, 
  Geol. 
  Mag. 
  [3] 
  vol. 
  x. 
  

   p. 
  489, 
  pi. 
  xvii. 
  fig. 
  1. 
  

  

  Type. 
  Imperfect 
  skull, 
  with 
  dentition 
  ; 
  Brighton 
  Museum. 
  

  

  A 
  small 
  species, 
  with 
  teeth 
  very 
  irregularly 
  arranged. 
  Teeth 
  of 
  

   the 
  principal 
  series 
  on 
  the 
  splenial 
  bone 
  obliquely 
  set, 
  very 
  irregular 
  

   in 
  size 
  and 
  shape, 
  wide 
  mesially, 
  tapering 
  at 
  each 
  extremity, 
  and 
  

   not 
  much 
  broader 
  than 
  long 
  ; 
  inner 
  teeth 
  relatively 
  large, 
  in 
  one 
  

   series, 
  usually 
  broader 
  than 
  long, 
  with 
  axis 
  oblique 
  ; 
  outer 
  teeth 
  in 
  

   about 
  three 
  very 
  irregular 
  series, 
  mostly 
  smaller 
  than 
  the 
  teeth 
  of 
  

   the 
  inner 
  series. 
  Vomerine 
  dentition 
  anteriorly 
  . 
  in 
  three 
  series, 
  

   posteriorly 
  in 
  five, 
  but 
  extremely 
  irregular 
  ; 
  the 
  largest 
  teeth 
  much 
  

   antero-posteriorly 
  elongated 
  and 
  comprised 
  in 
  the 
  outermost 
  series. 
  

   Nearly 
  all 
  the 
  teeth 
  indented, 
  the 
  smaller 
  ones 
  having 
  the 
  pit 
  

   especially 
  conspicuous 
  and 
  surrounded 
  with 
  a 
  crenulated 
  margin. 
  

  

  Form. 
  Sf 
  Loc. 
  Turonian 
  : 
  Sussex. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  The 
  type 
  and 
  only 
  known 
  

   specimen, 
  from 
  the 
  Lower 
  Chalk 
  of 
  Glynde, 
  is 
  preserved 
  in 
  the 
  

   Willett 
  Collection, 
  Brighton 
  Museum, 
  and 
  is 
  important 
  as 
  exhibiting 
  

   some 
  features 
  in 
  the 
  cranial 
  osteology 
  of 
  the 
  fish. 
  The 
  vomer 
  is 
  

   single 
  ; 
  the 
  mandibular 
  suspensorium 
  is 
  strongly 
  inclined 
  forwards 
  ; 
  

   the 
  pterygopalatine 
  arcade 
  is 
  delicate, 
  toothless, 
  and 
  fused 
  through- 
  

   out 
  the 
  greater 
  part 
  of 
  its 
  length 
  with 
  the 
  base 
  of 
  the 
  skull 
  ; 
  the 
  

   parasphenoid 
  has 
  a 
  deep 
  inferior 
  lamellar 
  keel 
  ; 
  the 
  articulation 
  of 
  

   the 
  mandible 
  is 
  very 
  deep 
  and 
  narrow 
  ; 
  and 
  there 
  is 
  a 
  large 
  super- 
  

   ficial 
  bone 
  apparently 
  to 
  be 
  identified 
  with 
  the 
  preoperculum. 
  

  

  Anomceodus 
  fraiponti, 
  Forir. 
  

  

  1889. 
  Anomceodus 
  fraiponti, 
  H. 
  Forir, 
  Ann. 
  Soc. 
  Ge*ol. 
  Belgique, 
  

   vol. 
  xvi. 
  Mem. 
  p. 
  445, 
  pi. 
  xiv. 
  fig. 
  1. 
  

  

  Type. 
  Splenial 
  dentition 
  ; 
  Ubaghs 
  Collection, 
  Maastricht. 
  

  

  A 
  species 
  somewhat 
  smaller 
  than 
  the 
  type, 
  known 
  only 
  by 
  the 
  

   splenial 
  dentition. 
  Teeth 
  of 
  the 
  principal 
  series 
  on 
  the 
  splenial 
  

   bone 
  scarcely 
  arcuated, 
  blunt 
  at 
  each 
  extremity, 
  attaining 
  a 
  breadth 
  

   more 
  than 
  three 
  times 
  as 
  great 
  as 
  their 
  length, 
  and 
  usually 
  sub- 
  

   divided 
  into 
  small 
  teeth 
  in 
  the 
  anterior 
  part 
  of 
  the 
  bone 
  ; 
  inner 
  

   teeth 
  very 
  small, 
  in 
  two 
  irregular 
  series 
  ; 
  outer 
  teeth 
  equally 
  small, 
  

   in 
  three 
  or 
  four 
  irregular 
  series. 
  

  

  Form. 
  <£" 
  Loc. 
  Upper 
  Cretaceous 
  (Danian) 
  : 
  Holland. 
  

  

  42994. 
  Part 
  of 
  principal 
  series 
  of 
  splenial 
  teeth 
  of 
  right 
  side 
  ; 
  

   Maastricht. 
  Van 
  Breda 
  Coll. 
  

  

  