﻿SEMIOSTOTIDJE. 
  

  

  101 
  

  

  right 
  and 
  left 
  suboperculum, 
  post-temporals, 
  supraclavicles, 
  

   left 
  clavicle, 
  and 
  numerous 
  scales 
  ; 
  Oxford 
  Clay, 
  Peter- 
  

   borough. 
  The 
  operculum, 
  suboperculum, 
  and 
  imperfect 
  

   right 
  mandibular 
  ramus 
  are 
  shown 
  of 
  two 
  -thirds 
  the 
  

   natural 
  size 
  in 
  figs. 
  20, 
  20 
  a. 
  Leeds 
  Coll. 
  

  

  P. 
  6173-a. 
  Two 
  specimens 
  of 
  imperfect 
  right 
  dentary 
  and 
  splenial, 
  

   showing 
  the 
  robust 
  teeth 
  on 
  the 
  latter 
  element, 
  the 
  first 
  

   specimen 
  figured 
  in 
  Damon's 
  ' 
  Geol. 
  Weymouth,' 
  Suppl. 
  

   pi. 
  xi. 
  fig. 
  12 
  ; 
  Kimmeridge 
  Clay, 
  "Weymouth. 
  

  

  Damon 
  Coll. 
  

  

  P. 
  6173b. 
  Imperfect 
  left 
  dentary 
  showing 
  bases 
  of 
  teeth; 
  Ximme- 
  

   ridge 
  Clay, 
  Weymouth. 
  Damon 
  Coll. 
  

  

  41964 
  a-d. 
  Fragment 
  of 
  upper 
  dentition, 
  detached 
  teeth, 
  imperfect 
  

   left 
  dentary 
  with 
  three 
  complete 
  teeth, 
  and 
  a 
  small 
  left 
  

   dentary 
  showing 
  bases 
  of 
  teeth 
  ; 
  Kimmeridge 
  Clay, 
  Wey- 
  

   mouth. 
  The 
  left 
  dentary 
  with 
  teeth 
  is 
  shown 
  of 
  two- 
  

   thirds 
  the 
  natural 
  size 
  in 
  fig. 
  21. 
  Purchased, 
  1870. 
  

  

  41964 
  e. 
  Left 
  operculum, 
  much 
  fractured, 
  0'115 
  in 
  depth 
  ; 
  Kimme- 
  

   ridge 
  Clay, 
  Weymouth. 
  Purchased, 
  1870. 
  

  

  41178. 
  Portion 
  of 
  squamation 
  ; 
  Kimmeridge 
  Clay, 
  Weymouth. 
  

  

  Purchased, 
  1868. 
  

  

  P. 
  1112. 
  Fragmentary 
  portion 
  of 
  squamation 
  and 
  some 
  detached 
  

   scales 
  ; 
  Kimmeridge 
  Clay, 
  Kimmeridge. 
  Egerton 
  Coll. 
  

  

  P. 
  6174. 
  Two 
  scales, 
  with 
  fractured 
  hinder 
  margin, 
  one 
  figured 
  by 
  

   Damon, 
  op. 
  cit. 
  pi. 
  xii. 
  fig. 
  10 
  ; 
  Kimmeridge 
  Clay, 
  Wey- 
  

   mouth. 
  Damon 
  Coll. 
  

  

  Lepidotus 
  affinis, 
  Fricke. 
  

  

  1875. 
  Lepidotus 
  affinis, 
  K. 
  Fricke, 
  Paheontogr. 
  vol. 
  xxii. 
  p. 
  378, 
  pi. 
  xxi. 
  

   figs. 
  2-6. 
  

  

  Type. 
  Fragments 
  of 
  dentition 
  ; 
  University 
  Geological 
  Museum, 
  

   Gottingen. 
  

  

  A 
  species 
  of 
  moderate 
  size, 
  known 
  only 
  by 
  the 
  dentition. 
  Mar- 
  

   ginal 
  teeth 
  styliform 
  and 
  slender 
  ; 
  inner 
  teeth 
  short, 
  stout, 
  smooth, 
  

   and 
  rounded. 
  Splenial 
  teeth 
  in 
  three 
  irregular 
  concentric 
  series, 
  

   the 
  innermost 
  excessively 
  large 
  ■ 
  pterygo-palatine 
  teeth 
  relatively 
  

   large, 
  and 
  in 
  four 
  irregular 
  longitudinal 
  series 
  ; 
  vomerine 
  dentition 
  

   increasing 
  in 
  size 
  backwards, 
  the 
  anterior 
  teeth 
  in 
  about 
  three 
  

  

  