﻿PLATE 
  V. 
  

  

  Fig. 
  Page 
  

  

  1. 
  Eugnathus 
  orthostomus, 
  Agassiz 
  (type 
  specimen 
  of 
  so-called 
  

  

  E. 
  scabriusculus, 
  Agassiz, 
  MS.); 
  lower 
  portion 
  of 
  head, 
  

   right 
  lateral 
  aspect. 
  — 
  Lower 
  Lias 
  ; 
  Lyme 
  Regis, 
  ag. 
  

   Angular, 
  br. 
  Branchiostegal 
  rays. 
  cl. 
  Dentary. 
  g. 
  Gular 
  

   plate, 
  i.op. 
  Interoperculum. 
  mx. 
  Maxilla, 
  p.op. 
  Pre- 
  

   operculum. 
  s.o. 
  Suborbital, 
  s.op. 
  Suboperculum. 
  

  

  [P. 
  509.] 
  293 
  

  

  2. 
  Eugnathus 
  philpotce, 
  Agassiz; 
  right 
  opercular 
  apparatus 
  

  

  and 
  clavicle, 
  outer 
  aspect. 
  — 
  Ibid. 
  cl. 
  Clavicle, 
  op. 
  Oper- 
  

   culum, 
  x. 
  .Fracture 
  across 
  clavicle. 
  Other 
  letters 
  as 
  

   above. 
  [38104.] 
  295 
  

  

  3. 
  Eugnathus 
  minor, 
  Agassiz 
  ; 
  head 
  and 
  opercular 
  apparatus, 
  

  

  left 
  lateral 
  and 
  superior 
  aspect. 
  — 
  Ibid. 
  c.o. 
  Circum- 
  

   orbitals. 
  fr. 
  Frontal, 
  pa. 
  Parietal, 
  p.t. 
  Post-tem- 
  

   poral, 
  s.mx. 
  Supramaxilla. 
  s.t. 
  Supratemporal. 
  sq. 
  

   Squamosal. 
  Other 
  letters 
  as 
  above. 
  [P. 
  3628.] 
  298 
  

  

  

  