﻿244 
  ACTINOPTEKYGII. 
  

  

  41392, 
  41870-73. 
  Four 
  fragments 
  and 
  one 
  small 
  much 
  -worn 
  vomer 
  ; 
  

   Weymouth. 
  Purchased, 
  1869. 
  

  

  P. 
  3787. 
  Portion 
  of 
  large 
  vomer 
  with 
  much-worn 
  teeth 
  ; 
  Kim- 
  

   meridge 
  Clay, 
  Ely. 
  EnnisHUen 
  Coll. 
  

  

  32549. 
  Dentition 
  of 
  large 
  left 
  splenial 
  ; 
  Kirameridge 
  Clay, 
  Havre. 
  

  

  Tesson 
  Coll. 
  

  

  41391, 
  44088. 
  Two 
  examples 
  of 
  the 
  left 
  splenial 
  ; 
  Weymouth. 
  

  

  Purchased, 
  1869, 
  1873. 
  

  

  P. 
  1614 
  a. 
  Two 
  right 
  splenials 
  ; 
  Weymouth. 
  Egerton 
  Coll. 
  

  

  P. 
  3786 
  C. 
  Right 
  and 
  left 
  splenials 
  with 
  very 
  irregular 
  principal 
  

   teeth, 
  and 
  the 
  former 
  showing 
  a 
  supplementary 
  inner 
  

   series 
  of 
  minute 
  teeth 
  ; 
  Weymouth. 
  Enniskillen 
  Coll. 
  

  

  Gyrodus 
  planidens, 
  sp. 
  nov. 
  

  

  1880. 
  Gyrodus 
  ornatissimus, 
  R. 
  Damon, 
  Geol. 
  Weymouth, 
  ed. 
  2, 
  Suppl. 
  

   pi. 
  xi. 
  fig. 
  6 
  (errore). 
  

  

  Type. 
  Vomer 
  ; 
  British 
  Museum. 
  

  

  A 
  species 
  of 
  moderate 
  or 
  small 
  size, 
  known 
  only 
  by 
  the 
  vomer, 
  

   which 
  bears 
  highly 
  ornamented 
  and 
  widely 
  spaced 
  teeth. 
  Teeth 
  

   of 
  median 
  series 
  on 
  the 
  vomer 
  much 
  less 
  in 
  width 
  than 
  the 
  two 
  

   flanking 
  series, 
  neither 
  the 
  median 
  nor 
  the 
  outermost 
  teeth 
  much 
  

   more 
  elevated 
  than 
  those 
  of 
  the 
  inner 
  flanking 
  series, 
  which 
  are, 
  

   however, 
  the 
  smallest. 
  

  

  The 
  splenial 
  dentition 
  of 
  this 
  species 
  is 
  either 
  unknown 
  or 
  indis- 
  

   tinguishable 
  from 
  that 
  of 
  G. 
  cuvieri. 
  

  

  Form. 
  Sf 
  Loc. 
  Kimmeridgian 
  : 
  Dorsetshire. 
  

  

  P. 
  6166 
  a. 
  Type 
  specimen 
  figured 
  by 
  Damon, 
  loc. 
  cit. 
  ; 
  Kimmeridge 
  

   Clay, 
  Weymouth. 
  Damon 
  Coll. 
  

  

  44086. 
  Vomer 
  ; 
  Weymouth. 
  Purchased, 
  1873. 
  

  

  P. 
  3785 
  b. 
  Another 
  fine 
  vomer 
  ; 
  Weymouth. 
  EnnisHUen 
  Coll. 
  

  

  P. 
  1615 
  a. 
  Imperfect 
  vomer 
  ; 
  Weymouth. 
  Egerton 
  Coll. 
  

  

  41393. 
  Two 
  small 
  specimens 
  ; 
  Weymouth. 
  Purchased, 
  1869. 
  

  

  Gyrodus 
  murchisoni, 
  Mantell. 
  

  

  1844. 
  Gyrodus 
  murchisoni, 
  G. 
  A. 
  Mantell, 
  Medals 
  of 
  Creation, 
  p. 
  643, 
  

   fig. 
  134. 
  

  

  Type. 
  Portion 
  of 
  vomer 
  ; 
  British 
  Museum. 
  

  

  A 
  large 
  species 
  known 
  only 
  by 
  the 
  vomerine 
  dentition. 
  Teeth 
  of 
  

  

  