﻿EUGNATHID^l. 
  293 
  

  

  P. 
  3633 
  b. 
  Head, 
  pectoral 
  fin, 
  and 
  anterior 
  squamation 
  of 
  a 
  large 
  

   fish, 
  exhibited 
  from 
  the 
  left 
  side 
  and 
  shown 
  of 
  the 
  natural 
  

   size 
  in 
  PI. 
  IY. 
  fig. 
  1. 
  Many 
  of 
  the 
  bones 
  are 
  well 
  

   displayed, 
  and 
  are 
  indicated 
  in 
  the 
  figure 
  by 
  the 
  lettering. 
  

   There 
  are 
  very 
  few 
  traces 
  of 
  a 
  tubercular 
  ornament, 
  

   apparently 
  confined 
  to 
  the 
  supratemporal, 
  post-temporal, 
  

   and 
  operculum, 
  though 
  a 
  few 
  isolated 
  tubercles 
  also 
  occur 
  

   on 
  the 
  cranial 
  roof. 
  The 
  postclavicular 
  scales 
  are 
  con- 
  

   spicuous, 
  and 
  some 
  of 
  the 
  anterior 
  flank-scales 
  are 
  deeper 
  

   than 
  broad. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  3633 
  C, 
  d. 
  A 
  small 
  fish 
  about 
  0-32 
  in 
  length, 
  very 
  fragmentary, 
  

   and 
  another 
  more 
  imperfect 
  small 
  specimen. 
  

  

  Enniskillen 
  Coll. 
  

  

  P. 
  3634 
  f. 
  Small 
  head 
  apparently 
  referable 
  to 
  young 
  of 
  this 
  species, 
  

   but 
  not 
  so 
  much 
  elongated 
  as 
  in 
  the 
  typical 
  adult 
  fishes. 
  

  

  Enniskillen 
  Coll. 
  

  

  P. 
  509. 
  Imperfect 
  right 
  mandibular 
  ramus 
  and 
  maxilla, 
  with 
  re- 
  

   mains 
  of 
  surrounding 
  bones 
  and 
  scales 
  ; 
  the 
  undescribed 
  

   type 
  specimen 
  of 
  the 
  so-called 
  Eugnathus 
  scabriusculus, 
  

   Agassiz, 
  loc. 
  cit. 
  The 
  specimen 
  is 
  shown 
  of 
  the 
  natural 
  

   size 
  in 
  PL 
  Y. 
  fig. 
  1. 
  Egerton 
  Coll. 
  

  

  P. 
  865. 
  Fragment 
  of 
  head 
  showing 
  jaws, 
  labelled 
  Eugnathus 
  spe- 
  

   ciosus 
  by 
  Agassiz. 
  Egerton 
  Coll. 
  

  

  Fig. 
  34. 
  

  

  cor 
  

  

  Eugnathus 
  orthostomus 
  ; 
  left 
  mandibular 
  ramus, 
  inner 
  aspect. 
  [No. 
  P. 
  870.] 
  

   ag., 
  angular; 
  art., 
  articular; 
  cor., 
  coronoid 
  ; 
  d., 
  dentary; 
  spl., 
  splenial. 
  

  

  P. 
  870. 
  Left 
  mandibular 
  ramus, 
  inner 
  aspect, 
  probably 
  of 
  this 
  

   species. 
  As 
  shown 
  by 
  the 
  accompanying 
  illustration 
  

   (fig. 
  34), 
  the 
  angular 
  {ag.), 
  articular 
  {art.), 
  coronoid 
  

   {cor.), 
  dentary 
  {d.), 
  and 
  splenial 
  elements 
  {spl.) 
  can 
  be 
  

   distinguished, 
  Egerton 
  Coll. 
  

  

  