﻿486 
  ACTINOPTERTGII. 
  

  

  of 
  the 
  fish 
  ; 
  caudal 
  pedicle 
  slender, 
  its 
  width 
  equalling 
  two-thirds 
  

   the 
  depth 
  of 
  the 
  flank-scales 
  in 
  the 
  middle 
  of 
  the 
  abdominal 
  region. 
  

   Pelvic 
  fins 
  arising 
  midway 
  between 
  the 
  pectorals 
  and 
  the 
  anal 
  ; 
  the 
  

   latter 
  fin 
  arising 
  slightly 
  behind 
  the 
  middle 
  point 
  between 
  the 
  pec- 
  

   torals 
  and 
  the 
  caudal. 
  Scales 
  smooth, 
  not 
  serrated. 
  

  

  Form. 
  Sf 
  Loc. 
  Lower 
  Kimmeridgian 
  (Lithographic 
  Stone) 
  : 
  Ain 
  7 
  

   Prance. 
  

  

  P. 
  4691 
  b, 
  C. 
  Two 
  fragments 
  ; 
  Cirin, 
  Ain. 
  Purchased, 
  1884. 
  

  

  Pleuropholis 
  obtusirostris, 
  Sauvage. 
  

  

  1883. 
  Pleuropholis 
  obtusirostris, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  G6oL 
  

   France, 
  [3J 
  vol. 
  xi. 
  p. 
  501, 
  pi. 
  x. 
  fig. 
  2. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Lyons 
  Museum. 
  

  

  A 
  small 
  fish 
  about 
  0*065 
  in 
  length, 
  possibly 
  young 
  of 
  the 
  pre- 
  

   ceding 
  species. 
  Length 
  of 
  head 
  with 
  opercular 
  apparatus 
  about 
  

   equalling 
  the 
  maximum 
  depth 
  of 
  the 
  trunk 
  and 
  contained 
  five 
  times 
  

   in 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  width 
  of 
  caudal 
  pedicle, 
  scales, 
  and 
  

   arrangement 
  of 
  pectoral, 
  pelvic, 
  and 
  anal 
  fins 
  as 
  in 
  P. 
  thiollieri 
  ; 
  

   dorsal 
  fin 
  arising 
  slightly 
  behind 
  origin 
  of 
  anal. 
  

  

  Form. 
  Sf 
  Loc. 
  Lower 
  Kimmeridgian 
  (Lithographic 
  Stone) 
  : 
  Ain, 
  

   France. 
  

  

  P. 
  4691. 
  Imperfect 
  fish, 
  wanting 
  fins, 
  but 
  displaying 
  the 
  course 
  

   of 
  the 
  lateral 
  line 
  along 
  the 
  inferior 
  scales 
  ; 
  Cirin, 
  Ain. 
  

  

  Purchased, 
  1884. 
  

  

  Pleuropholis 
  lienardi, 
  Sauvage. 
  

  

  1883. 
  Pleuropholis 
  lienardi, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  G6ol. 
  France, 
  

   [3] 
  vol. 
  xi. 
  p. 
  501, 
  pi. 
  x. 
  fig. 
  3. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Verdun 
  Museum. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0'065. 
  Length 
  of 
  head 
  

   with 
  opercular 
  apparatus 
  slightly 
  exceeding 
  the 
  maximum 
  depth 
  of 
  

   the 
  trunk, 
  and 
  contained 
  nearly 
  five 
  times 
  in 
  the 
  total 
  length 
  

   of 
  the 
  fish 
  ; 
  width 
  of 
  caudal 
  pedicle 
  equalling 
  two- 
  thirds 
  the 
  

   depth 
  of 
  the 
  flank-scales 
  in 
  the 
  middle 
  of 
  the 
  abdominal 
  region. 
  

   Distance 
  between 
  origin 
  of 
  anal 
  fin 
  and 
  that 
  of 
  the 
  caudal 
  scarcely 
  

   exceeding 
  half 
  that 
  between 
  the 
  former 
  and 
  the 
  pectorals 
  ; 
  dorsal 
  

   fin 
  arising 
  slightly 
  in 
  advance 
  of 
  the 
  anal. 
  Scales 
  smooth, 
  not 
  

   serrated. 
  

  

  Form. 
  Sf 
  Loc. 
  Portlandian 
  : 
  Dept. 
  Meuse, 
  France. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  