﻿ETJGNATHID^:. 
  313 
  

  

  border 
  or 
  from 
  the 
  antero-superior 
  angle. 
  The 
  external 
  bones 
  and 
  

   some 
  of 
  the 
  fin-rays 
  with 
  a 
  similarly 
  fine 
  and 
  close 
  tubercular 
  

   ornament. 
  

  

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

   Bavaria. 
  

  

  P. 
  2060. 
  Type 
  specimen, 
  labelled 
  by 
  Agassiz 
  and 
  Egerton, 
  com- 
  

   prising 
  the 
  imperfect 
  head 
  and 
  scattered 
  remains 
  of 
  the 
  

   anterior 
  portion 
  of 
  the 
  trunk 
  ; 
  Solenhofen. 
  Part 
  of 
  the 
  

   highly 
  ornamented 
  cranial 
  roof 
  is 
  shown 
  in 
  impression, 
  

   while 
  the 
  imperfect 
  facial 
  and 
  opercular 
  bones 
  of 
  the 
  

   right 
  side 
  are 
  exposed 
  from 
  within. 
  The 
  two 
  left 
  lower 
  

   suborbitals 
  are 
  also 
  shown 
  from 
  within 
  where 
  displaced 
  

   above 
  the 
  head 
  ; 
  and 
  neither 
  on 
  these 
  nor 
  on 
  those 
  of 
  the 
  

   opposite 
  side 
  can 
  the 
  course 
  of 
  the 
  sensory 
  canal 
  be 
  

   traced. 
  The 
  outlines 
  of 
  the 
  mandible 
  and 
  maxilla 
  are 
  

   not 
  clear, 
  but 
  a 
  displaced 
  premaxilla 
  exhibits 
  a 
  broad 
  

   ascending 
  process 
  at 
  one 
  end, 
  the 
  height 
  of 
  this 
  equalling 
  

   the 
  length 
  of 
  the 
  dentigerous 
  border 
  of 
  the 
  bone. 
  One 
  

   imperfect 
  element, 
  which 
  seems 
  to 
  be 
  maxilla, 
  has 
  a 
  

   slightly 
  concave 
  oral 
  margin, 
  with 
  very 
  small, 
  closely- 
  

   arranged 
  teeth. 
  The 
  left 
  operculum, 
  though 
  imperfect, 
  

   is 
  shown 
  to 
  have 
  been 
  deeper 
  than 
  broad 
  ; 
  while 
  the 
  

   suture 
  between 
  this 
  and 
  the 
  suboperculum 
  is 
  evidently 
  

   oblique. 
  A 
  few 
  very 
  slender 
  bones, 
  which 
  seem 
  to 
  be 
  

   short 
  ribs, 
  are 
  scattered 
  among 
  the 
  remains 
  of 
  the 
  trunk, 
  

   but 
  there 
  are 
  no 
  traces 
  of 
  vertebrae. 
  Numerous 
  stout 
  fin- 
  

   rays 
  occur, 
  and 
  two 
  apparently 
  from 
  the 
  front 
  of 
  the 
  

   pectoral 
  fin 
  are 
  covered 
  with 
  the 
  tubercular 
  ornament, 
  

   while 
  some 
  others 
  exhibit 
  the 
  same 
  ornament 
  on 
  one 
  

   border. 
  The 
  pelvic 
  bones 
  are 
  shown 
  to 
  be 
  no 
  broader 
  

   distally 
  than 
  proximally, 
  a 
  wing 
  of 
  bone 
  extending 
  

   inwards 
  on 
  each 
  side 
  from 
  the 
  proximal 
  two-thirds 
  of 
  the 
  

   normal 
  triangular 
  element. 
  The 
  scales 
  are 
  remarkably 
  

   scattered 
  and 
  shown 
  in 
  all 
  positions, 
  displaying 
  the 
  stout 
  

   inner 
  rib 
  and 
  peg-and-socket 
  articulation 
  ; 
  but 
  narrowed 
  

   scales 
  are 
  few. 
  Among 
  the 
  remains 
  are 
  the 
  jaws 
  of 
  two 
  

   small 
  Pycnodonts, 
  perhaps 
  the 
  relics 
  of 
  food. 
  

  

  Egerton 
  Coll. 
  

  

  P. 
  3583. 
  Imperfect 
  caudal 
  region 
  with 
  caudal 
  fin, 
  possibly 
  of 
  the 
  

   same 
  individual 
  as 
  the 
  preceding, 
  labelled" 
  Caturus 
  maxi- 
  

   mus 
  or 
  new 
  ? 
  " 
  by 
  Agassiz. 
  All 
  the 
  scales 
  are 
  ornamented, 
  

   and 
  at 
  the 
  base 
  of 
  the 
  upper 
  caudal 
  lobe 
  one 
  ridge-scale 
  is 
  

  

  