﻿ETJGNATHID^. 
  303 
  

  

  P. 
  508. 
  Imperfect 
  squamation 
  and 
  other 
  fragments, 
  specifically 
  

   indeterminable, 
  but 
  marked 
  as 
  the 
  type 
  specimen 
  of 
  

   Eugnathus 
  fasciculatus, 
  Agassiz, 
  Poiss. 
  Poss. 
  vol. 
  ii. 
  pt. 
  ii. 
  

   1844, 
  p. 
  105 
  (name 
  only) 
  ; 
  Upper 
  Lias, 
  Whitby. 
  

  

  Egerton 
  Coll. 
  

  

  P. 
  873, 
  P. 
  4468. 
  Small 
  fish 
  in 
  counterpart, 
  wanting 
  the 
  head, 
  and 
  

   labelled 
  Eugnathus 
  fasciculatus 
  by 
  Agassiz. 
  The 
  pectoral 
  

   fin 
  is 
  relatively 
  large, 
  with 
  about 
  15 
  rays 
  ; 
  the 
  dorsal 
  fin 
  

   arises 
  opposite 
  a 
  point 
  midway 
  between 
  the 
  pectoral 
  and 
  

   anal 
  fins 
  ; 
  the 
  latter 
  is 
  only 
  about 
  half 
  as 
  large 
  as 
  the 
  

   dorsal. 
  Egerton 
  &f 
  Enniskillen 
  Colls. 
  

  

  28855 
  a. 
  Fragmentary 
  small 
  trunk 
  in 
  counterpart 
  ; 
  Upper 
  Lias, 
  

   Cheltenham. 
  Purchased, 
  1854. 
  

  

  32450. 
  Head 
  and 
  greater 
  portion 
  of 
  trunk 
  of 
  a 
  small 
  fish, 
  with 
  

   highly 
  ornamented 
  scales 
  which 
  are 
  serrated 
  even 
  in 
  the 
  

   hinder 
  portion 
  of 
  the 
  caudal 
  region 
  ; 
  Upper 
  Lias, 
  Caen, 
  

   Normandy. 
  The 
  mandibular 
  teeth 
  are 
  only 
  moderately 
  

   robust, 
  and 
  the 
  operculum 
  is 
  considerably 
  deeper 
  than 
  

   broad. 
  Tesson 
  Coll. 
  

  

  P. 
  7563. 
  Portion 
  of 
  abdominal 
  region 
  displaying 
  some 
  of 
  the 
  

   anterior 
  flank-scales 
  ; 
  Lower 
  Lias, 
  Lyme 
  Kegis. 
  

  

  Presented 
  by 
  Edward 
  Charlesworth, 
  Esq. 
  

  

  P. 
  510. 
  Imperfect 
  left 
  maxilla, 
  shown 
  from 
  the 
  outer 
  aspect 
  of 
  the 
  

   natural 
  size 
  in 
  PL 
  IV. 
  fig. 
  2, 
  intended 
  by 
  Agassiz 
  to 
  be 
  

   the 
  type 
  specimen 
  of 
  his 
  undescribed 
  species 
  Eugnathus 
  

   tenuidens 
  (Poiss. 
  Foss. 
  vol. 
  ii. 
  pt. 
  ii. 
  1844, 
  p. 
  105) 
  ; 
  Lower 
  

   Lias, 
  Street, 
  Somersetshire. 
  Egerton 
  Coll. 
  

  

  P. 
  517. 
  Imperfect 
  fish 
  about 
  0-15 
  in 
  total 
  length, 
  intended 
  by 
  

   Agassiz 
  to 
  be 
  the 
  type 
  specimen 
  of 
  his 
  undescribed 
  species 
  

   Pholidophorus 
  leptocejohalus 
  (Poiss. 
  Poss. 
  vol. 
  ii. 
  pt. 
  i. 
  

   1844, 
  p. 
  288) 
  ; 
  Lower 
  Lias, 
  Street. 
  The 
  cranium 
  is 
  

   wanting, 
  but 
  the 
  right 
  opercular 
  and 
  facial 
  bones 
  are 
  

   exhibited 
  in 
  impression. 
  The 
  characteristic 
  maxilla 
  and 
  

   its 
  dentition 
  are 
  distinctly 
  observable 
  ; 
  while 
  the 
  oper- 
  

   culum 
  is 
  shown 
  to 
  be 
  about 
  as 
  deep 
  as 
  broad. 
  The 
  fins 
  

   are 
  represented 
  only 
  by 
  insignificant 
  fragments, 
  but 
  the 
  

   dorsal 
  is 
  proved 
  to 
  have 
  been 
  relatively 
  large. 
  The 
  

   principal 
  flank-scales 
  are 
  very 
  delicately 
  crimped 
  and 
  

   serrated 
  on 
  their 
  hinder 
  margin 
  in 
  the 
  abdominal 
  region, 
  

  

  