﻿SEMIONOTID^E. 
  49 
  

  

  Trunk 
  deeply 
  fusiform 
  or 
  cycloidal 
  ; 
  no 
  

  

  ossifications 
  in 
  notochordal 
  sheath 
  ; 
  

  

  teeth 
  tritoral 
  ; 
  opercular 
  apparatus 
  

  

  reduced 
  ; 
  fulcra 
  absent, 
  and 
  dorsal 
  

  

  fin 
  elongated 
  Pycnodontid^: 
  (p. 
  189.) 
  

  

  II. 
  Mandibular 
  suspensorium 
  inclined 
  back- 
  

   wards 
  and 
  gape 
  of 
  mouth 
  wide. 
  

   Trunk 
  e]ongate 
  or 
  fusiform 
  ; 
  vertebrae 
  

  

  very 
  rarely 
  more 
  than 
  incomplete 
  

  

  rings 
  ; 
  marginal 
  teeth 
  large 
  and 
  

  

  conical, 
  becoming 
  minute 
  on 
  most 
  

  

  of 
  the 
  inner 
  dentigerous 
  bones; 
  

  

  premaxillae 
  in 
  contact 
  mesially 
  ; 
  

  

  fulcra 
  large, 
  and 
  dorsal 
  fin 
  short 
  . 
  . 
  Eugnathid^ 
  (p. 
  285). 
  

   Trunk 
  elongate 
  or 
  elongate-fusiform 
  ; 
  

  

  vertebras 
  variable, 
  often 
  complete 
  

  

  discs; 
  marginal 
  teeth 
  large 
  and 
  

  

  conical, 
  inner 
  teeth 
  mostly 
  minute 
  ; 
  

  

  premaxillae 
  in 
  contact 
  mesially 
  ; 
  

  

  fulcra 
  minute 
  or 
  wanting, 
  and 
  dorsal 
  

  

  fin 
  variable 
  in 
  length 
  AMHDiE 
  (p. 
  360). 
  

  

  Trunk 
  elongate-fusiform 
  ; 
  notochord 
  per- 
  

   sistent, 
  sometimes 
  with 
  very 
  feeble 
  

  

  ossifications 
  in 
  the 
  sheath 
  ; 
  ethmoid 
  

  

  fused 
  with 
  the 
  vomers 
  and 
  forming 
  

  

  a 
  prominent 
  rostrum, 
  which 
  sepa- 
  

   rates 
  the 
  premaxillae 
  ; 
  teeth 
  large 
  

  

  and 
  conical 
  on 
  part 
  at 
  least 
  of 
  all 
  

  

  the 
  dentigerous 
  bones 
  j 
  fulcra 
  minute 
  

  

  or 
  absent, 
  fin-rays 
  slender 
  and 
  closely 
  

  

  set, 
  and 
  dorsal 
  fin 
  short 
  Pachycoemidje 
  (p. 
  374). 
  

  

  Family 
  SEMIONOTID^E. 
  

  

  Trunk 
  more 
  or 
  less 
  deeply 
  fusiform, 
  rarely 
  cycloidal. 
  Cranial 
  

   and 
  facial 
  bones 
  all 
  robust 
  and 
  opercular 
  apparatus 
  complete, 
  

   but 
  branchiostegals 
  sometimes 
  reduced; 
  parietals 
  meeting 
  in 
  the 
  

   middle 
  line 
  ; 
  mandibular 
  suspensorium 
  vertical 
  or 
  inclined 
  forwards, 
  

   and 
  gape 
  of 
  mouth 
  small; 
  teeth 
  styliform 
  or 
  tritoral, 
  especially 
  

   well-developed 
  on 
  the 
  inner 
  bones 
  of 
  the 
  mouth, 
  and 
  with 
  vertical 
  

   successors. 
  Notochord 
  persistent, 
  the 
  vertebras 
  never 
  advancing 
  

   beyond 
  the 
  annular 
  stage. 
  Fin-rays 
  robust, 
  the 
  majority 
  well- 
  

   spaced, 
  articulated 
  and 
  divided 
  distally 
  ; 
  fulcra 
  large 
  ; 
  dorsal 
  fin 
  not 
  

   extending 
  more 
  than 
  half 
  the 
  length 
  of 
  the 
  trunk. 
  Scales 
  rhombic, 
  

   except 
  occasionally 
  in 
  the 
  caudal 
  region. 
  

  

  The 
  osteological 
  characters 
  of 
  this 
  family 
  are 
  best 
  known 
  in 
  

   Lepidotus 
  and 
  Dapedius, 
  and 
  a 
  detailed 
  description 
  of 
  each 
  of 
  those 
  

   genera 
  is 
  given 
  below 
  (pp. 
  78, 
  128). 
  

  

  PART 
  in. 
  E 
  

  

  