﻿SEMIONOTID^}. 
  Ill 
  

  

  scales 
  for 
  the 
  dorso-lateral 
  line 
  are 
  also 
  seen 
  as 
  far 
  as 
  the 
  

   origin 
  of 
  the 
  dorsal 
  fin 
  ; 
  and 
  the 
  small 
  ridge-scales, 
  only- 
  

   preserved 
  for 
  a 
  short 
  distance 
  behind 
  the 
  head, 
  exhibit 
  a 
  

   comparatively 
  blunt 
  acumination. 
  At 
  the 
  base 
  of 
  the 
  

   dorsal 
  and 
  caudal 
  fins 
  one 
  fringing 
  row 
  of 
  scales 
  is 
  directly 
  

   related 
  to 
  the 
  fin-rays 
  and 
  fulcra, 
  and 
  does 
  not 
  conform 
  to 
  

   the 
  regular 
  flank- 
  series 
  of 
  the 
  trunk 
  ; 
  at 
  the 
  base 
  of 
  the 
  

   anal 
  fin 
  the 
  squamation 
  is 
  lost. 
  BecMes 
  Coll. 
  

  

  P. 
  4915. 
  A 
  more 
  imperfect 
  and 
  fractured 
  specimen, 
  in 
  counterpart 
  ; 
  

   Hastings 
  Sands, 
  Silver 
  Hill, 
  Hastings. 
  The 
  antorbital 
  

   portion 
  of 
  the 
  skull 
  is 
  wanting, 
  but 
  most 
  of 
  the 
  circum- 
  

   orbital 
  and 
  suborbital 
  bones 
  are 
  preserved 
  and 
  the 
  former 
  

   are 
  larger 
  than 
  the 
  latter. 
  The 
  preoperculum 
  is 
  coarsely 
  

   rugose, 
  while 
  the 
  operculum 
  and 
  suboperculum 
  are 
  closely 
  

   and 
  finely 
  tuberculated 
  ; 
  owing 
  to 
  fracture, 
  the 
  form 
  of 
  

   the 
  operculum 
  cannot 
  be 
  satisfactorily 
  determined, 
  but 
  the 
  

   proportions 
  of 
  the 
  suboperculum 
  seem 
  to 
  be 
  as 
  in 
  the 
  so- 
  

   called 
  L. 
  fittoni, 
  and 
  its 
  anterior 
  ascending 
  process 
  is 
  much 
  

   more 
  robust 
  than 
  in 
  the 
  type 
  specimen 
  of 
  L. 
  mantelli. 
  

   Part 
  of 
  a 
  pectoral 
  fin 
  is 
  preserved, 
  and 
  the 
  rays 
  are 
  shown 
  

   to 
  have 
  been 
  very 
  closely 
  articulated 
  distally. 
  Fragments 
  

   of 
  the 
  dorsal 
  and 
  caudal 
  fins 
  and 
  the 
  imperfect 
  squama- 
  

   tion 
  present 
  no 
  features 
  worthy 
  of 
  special 
  note. 
  

  

  Dawson 
  Coll. 
  

  

  P. 
  6338. 
  Head 
  and 
  greater 
  portion 
  of 
  trunk, 
  apparently 
  much 
  

   abraded, 
  and 
  showing 
  only 
  the 
  origin 
  of 
  the 
  dorsal 
  fin 
  ; 
  

   Hastings. 
  The 
  head-bones 
  show 
  traces 
  of 
  fine 
  tubercula- 
  

   tions 
  besides 
  the 
  coarse 
  rugae, 
  but 
  the 
  much-fractured 
  

   operculum 
  is 
  smooth. 
  The 
  fluted 
  structure 
  of 
  the 
  sca]es 
  

   is 
  exposed 
  by 
  abrasion; 
  the 
  principal 
  flank-scales 
  are 
  

   serrated 
  ; 
  and 
  the 
  dorsal 
  ridge-scales 
  do 
  not 
  exhibit 
  traces 
  

   of 
  an 
  acumination 
  until 
  beyond 
  a 
  considerable 
  distance 
  

   from 
  the 
  head. 
  BecMes 
  Coll. 
  

  

  P. 
  6339-40. 
  Two 
  more 
  imperfect, 
  similarly 
  abraded 
  specimens 
  ; 
  

   Hastings. 
  BecMes 
  Coll. 
  

  

  P. 
  5129. 
  Imperfect 
  abraded 
  head 
  and 
  portion 
  of 
  trunk, 
  displaying 
  

   the 
  symphysis 
  of 
  the 
  mandible 
  and 
  the 
  lower 
  extremity 
  of 
  

   the 
  right 
  clavicle; 
  Horsham. 
  The 
  external 
  head-bones 
  

   are 
  coarsely 
  rugose 
  and 
  in 
  part 
  tuberculated; 
  the 
  oper- 
  

   culum 
  and 
  suboperculum 
  are 
  rugose 
  only, 
  but 
  seem 
  to 
  

   have 
  been 
  much 
  abraded. 
  The 
  ascending 
  process 
  of 
  the 
  

  

  