﻿EUGNATHID.E. 
  

  

  345 
  

  

  and 
  hypocentra, 
  the 
  latter 
  with 
  a 
  pair 
  of 
  short 
  processes 
  

   for 
  the 
  support 
  of 
  the 
  delicate 
  ribs. 
  In 
  the 
  abdominal 
  

   region 
  the 
  series 
  of 
  curved 
  robust 
  neural 
  spii.es, 
  separate 
  

   from 
  the 
  supporting 
  arches, 
  is 
  well 
  exhibited. 
  The 
  

   imperfect 
  left 
  clavicle 
  is 
  displaced 
  upwards, 
  and 
  the 
  

   comparatively 
  thin 
  and 
  laminar 
  supraclavicle 
  lies 
  above 
  

   it. 
  In 
  the 
  remains 
  of 
  the 
  pectoral 
  fin, 
  the 
  stout 
  foremost 
  

   ray 
  is 
  conspicuous 
  ; 
  and 
  the 
  very 
  fine 
  distal 
  subdivision 
  

   of 
  most 
  of 
  the 
  rays 
  is 
  well 
  shown. 
  One 
  of 
  the 
  pelvic 
  fins 
  

   occurs 
  almost 
  in 
  its 
  natural 
  position, 
  comprising 
  seven 
  or 
  

   eight 
  rays, 
  with 
  a 
  series 
  of 
  large 
  fulcra 
  on 
  its 
  anterior 
  

   margin. 
  About 
  sixteen 
  rays 
  are 
  preserved 
  in 
  the 
  frag- 
  

   mentary 
  dorsal 
  fin, 
  with 
  a 
  few 
  displaced 
  fulcra 
  and 
  

   thirteen 
  of 
  its 
  basal 
  bones. 
  The 
  caudal 
  fin 
  is 
  too 
  im- 
  

   perfect 
  for 
  description, 
  and 
  the 
  anal 
  is 
  wanting. 
  The 
  

   squamation 
  is 
  also 
  very 
  imperfect, 
  and 
  the 
  only 
  ornament 
  

   is 
  observable 
  on 
  some 
  of 
  the 
  scales 
  of 
  the 
  flank, 
  which 
  are 
  

   crimped 
  much 
  like 
  the 
  scales 
  of 
  Eugnathus. 
  

  

  Enniskillen 
  Coll. 
  

  

  P. 
  3645. 
  An 
  imperfect 
  head, 
  exposed 
  from 
  the 
  right 
  side 
  ; 
  Lyme 
  

   Regis. 
  A 
  fragment 
  of 
  the 
  occipital 
  portion 
  of 
  the 
  

   cranium 
  occurs 
  behind, 
  and 
  the 
  squamosal 
  is 
  shown 
  to 
  be 
  

   ornamented 
  with 
  a 
  few 
  sparse 
  tubercles. 
  The 
  cheek- 
  

   plates 
  are 
  mostly 
  smooth, 
  but 
  sometimes 
  feebly 
  tuber- 
  

   culated 
  and 
  frequently 
  rugose 
  towards 
  the 
  margin. 
  The 
  

   maxilla 
  (mx.) 
  and 
  suprama^l 
  11 
  ^ 
  (s.mx.) 
  are 
  shown 
  of 
  the 
  

   natural 
  size 
  in 
  PI. 
  VII. 
  fig. 
  3. 
  The 
  bases 
  of 
  two 
  very 
  

   large 
  premaxillary 
  teeth 
  are 
  seen, 
  and 
  there 
  is 
  evidence 
  

   also 
  of 
  equally 
  large 
  teeth 
  in 
  the 
  mandible, 
  which 
  is 
  

   unfortunately 
  much 
  obscured. 
  The 
  preoperculuni 
  is 
  

   rugose 
  near 
  its 
  hinder 
  margin 
  ; 
  while 
  the 
  crushed 
  

   remains 
  of 
  the 
  operculum 
  and 
  suboperculum 
  exhibit 
  a 
  

   few 
  small 
  sparse 
  tuberculations. 
  Enniskillen 
  Coll. 
  

  

  P. 
  514. 
  Crushed 
  fragment 
  of 
  jaws, 
  the 
  dentary 
  shown 
  of 
  the 
  

   natural 
  size 
  in 
  PI. 
  VII. 
  fig. 
  2, 
  and 
  intended 
  by 
  Agassiz 
  to 
  

   be 
  described 
  as 
  the 
  type 
  specimen 
  of 
  Conodus 
  ferox; 
  

   Lyme 
  llegis. 
  Three 
  large 
  dentary 
  teeth 
  are 
  preserved, 
  

   though 
  somewhat 
  broadened 
  at 
  the 
  base 
  by 
  accidental 
  

   crushing; 
  and 
  there 
  are 
  the 
  bases 
  of 
  smaller 
  teeth 
  in 
  

   fragments 
  of 
  the 
  maxilla. 
  The 
  very 
  small 
  and 
  stout 
  

   splenial 
  teeth 
  are 
  also 
  seen. 
  Egerton 
  Coll. 
  

  

  