﻿348 
  ACTINOPTBRYGII. 
  

  

  with 
  a 
  very 
  slender 
  incurved 
  apex. 
  Splenial 
  teeth 
  for 
  the 
  most 
  

   part 
  strongly 
  incurved, 
  and 
  the 
  largest 
  not 
  more 
  than 
  half 
  the 
  size 
  

   of 
  the 
  principal 
  teeth 
  on 
  the 
  dentary. 
  

  

  Form, 
  of 
  Loc. 
  Kimmeridgian 
  : 
  Oxfordshire. 
  

  

  46318. 
  Type 
  specimen 
  comprising 
  the 
  right 
  maxilla 
  with 
  the 
  

   imperfect 
  right 
  mandibular 
  ramus 
  and 
  other 
  fragments 
  ; 
  

   Kimmeridge 
  Clay, 
  Culham, 
  Oxfordshire. 
  The 
  small 
  inner 
  

   row 
  of 
  curved 
  mandibular 
  teeth 
  described 
  by 
  Owen 
  is 
  

   evidently 
  borne 
  by 
  the 
  splenial 
  bone, 
  which 
  enters 
  and 
  

   strengthens 
  the 
  mandibular 
  symphysis. 
  Cunnington 
  Coll. 
  

  

  46337. 
  Abraded 
  fragment 
  of 
  the 
  anterior 
  end 
  of 
  the 
  right 
  maxilla, 
  

   doubtfully 
  ascribed 
  to 
  this 
  species 
  ; 
  Kimmeridge 
  Clay, 
  

   Devizes. 
  Cunnington 
  Coll. 
  

  

  Caturus 
  (Strobilodus) 
  purbeckensis 
  (A. 
  S. 
  Woodward). 
  

  

  1890. 
  Strobilodus 
  purbeckensis, 
  A. 
  S. 
  Woodward, 
  Proc. 
  Zool. 
  Soc. 
  

   p. 
  350, 
  pi. 
  xxix. 
  fig. 
  4. 
  

  

  Type. 
  Head 
  ; 
  British 
  Museum. 
  

  

  Head 
  with 
  opercular 
  apparatus 
  ordinarily 
  measuring 
  about 
  0*1 
  in 
  

   length 
  ; 
  external 
  bones 
  without 
  ornament. 
  Maxilla 
  comparatively 
  

   slender, 
  the 
  oral 
  border 
  slightly 
  convex 
  in 
  its 
  anterior 
  two-thirds, 
  

   then 
  a 
  little 
  concave, 
  finally 
  turned 
  downwards 
  behind 
  where 
  the 
  

   teeth 
  are 
  remarkably 
  slender 
  and 
  closely 
  arranged 
  ; 
  teeth 
  of 
  middle 
  

   of 
  maxilla 
  about 
  twice 
  as 
  deep 
  as 
  the 
  bone 
  at 
  their 
  insertion, 
  with 
  

   much 
  produced 
  slender 
  apical 
  portion. 
  Mandible 
  very 
  slender, 
  

   pointed 
  but 
  not 
  curved 
  downwards 
  in 
  front 
  ; 
  height 
  of 
  middle 
  

   dentary 
  teeth 
  about 
  equal 
  to 
  depth 
  of 
  bone 
  at 
  their 
  insertion. 
  All 
  

   the 
  teeth 
  indented 
  at 
  the 
  base 
  on 
  the 
  outer 
  face. 
  

  

  Form. 
  6f 
  Loc. 
  Purbeckian 
  : 
  Dorsetshire. 
  

  

  46911. 
  Type 
  specimen 
  described 
  and 
  figured, 
  loc. 
  cit. 
  ; 
  Swanage. 
  

  

  Purchased, 
  1875. 
  

  

  P. 
  4273. 
  Imperfect 
  right 
  dentary 
  with 
  well-preserved 
  teeth 
  ; 
  

   Swanage. 
  Ennishillen 
  Coll. 
  

  

  The 
  following 
  specimens 
  may 
  also 
  be 
  referred 
  to 
  Caturus 
  but 
  

   are 
  not 
  specifically 
  determined 
  : 
  — 
  

  

  P. 
  3578. 
  Fragmentary 
  remains 
  of 
  a 
  large 
  fish 
  ; 
  Lower 
  Lias, 
  Lyme 
  

   Regis. 
  Ennishillen 
  Coll. 
  

  

  P. 
  530. 
  Imperfect 
  skeleton 
  nearly 
  a 
  metre 
  in 
  length 
  ; 
  Upper 
  Lias, 
  

   Boll, 
  Wiirtemberg. 
  Egerton 
  Coll. 
  

  

  