﻿422 
  ACTINOPTERYGII. 
  

  

  anal. 
  The 
  quadrate, 
  symplectic, 
  epihyal, 
  and 
  ceratohyal 
  

   bones 
  are 
  conspicuous. 
  The 
  delicate 
  ribs 
  are 
  shown. 
  

  

  Haberlein 
  Coll. 
  

  

  P. 
  6940. 
  Fine 
  specimen, 
  0'56 
  in 
  length 
  ; 
  Eichstadt. 
  

  

  By 
  exchange, 
  1893. 
  

  

  37068. 
  Head 
  of 
  a 
  similar 
  fish 
  in 
  lateral 
  aspect, 
  displaying 
  the 
  

   dentition 
  of 
  the 
  maxilla, 
  dentary, 
  and 
  splenial 
  bones 
  ; 
  

   Solenhofen. 
  A 
  small 
  plate 
  above 
  the 
  hinder 
  end 
  of 
  the 
  

   maxilla 
  seems 
  to 
  be 
  the 
  supramaxilla. 
  Haberlein 
  Coll. 
  

  

  P. 
  973. 
  Another 
  head 
  with 
  opercular 
  apparatus, 
  well 
  preserved 
  in 
  

   lateral 
  aspect, 
  showing 
  some 
  of 
  the 
  ornament 
  of 
  the 
  

   operculum 
  and 
  cranial 
  roof. 
  A 
  small 
  supramaxilla 
  occurs 
  

   above 
  the 
  hinder 
  end 
  of 
  the 
  maxilla 
  ; 
  and 
  the 
  apertures 
  of 
  

   the 
  lateral 
  line 
  are 
  conspicuous 
  along 
  the 
  outer 
  face 
  of 
  the 
  

   dentary. 
  Egerton 
  Coll. 
  

  

  P. 
  3805. 
  Somewhat 
  larger 
  head, 
  lateral 
  aspect, 
  with 
  several 
  bones 
  

   crushed 
  and 
  displaced 
  ; 
  Kelheim. 
  The 
  palato-pterygoid 
  

   dentition 
  is 
  shown 
  within 
  the 
  mouth, 
  and 
  part 
  of 
  the 
  

   suture 
  between 
  the 
  angular 
  and 
  dentary 
  elements 
  in 
  the 
  

   mandible 
  can 
  be 
  distinguished. 
  One 
  of 
  the 
  branchial 
  

   arches 
  with 
  its 
  gill-supports 
  is 
  displaced 
  below 
  the 
  

   mandible. 
  The 
  series 
  of 
  branchiostegal 
  rays 
  is 
  also 
  well- 
  

   shown, 
  about 
  12 
  in 
  number 
  on 
  one 
  side, 
  and 
  there 
  are 
  

   remains 
  of 
  the 
  ossified 
  sclerotic 
  ring. 
  EnnisTcillen 
  Coll. 
  

  

  P. 
  970, 
  P. 
  3806. 
  Head 
  and 
  greater 
  portion 
  of 
  trunk 
  of 
  a 
  fish 
  about 
  

   0*45 
  in 
  length, 
  very 
  imperfectly 
  preserved 
  in 
  counterpart 
  ; 
  

   Solenhofen. 
  The 
  position 
  of 
  the 
  notochord 
  is 
  indicated 
  

   by 
  a 
  vacant 
  space, 
  the 
  absence 
  of 
  calcified 
  ring- 
  vertebrae 
  

   being 
  doubtless 
  due 
  to 
  the 
  immaturity 
  of 
  the 
  specimen. 
  

   The 
  scales 
  are 
  smooth. 
  Egerton 
  fy 
  EnnisTcillen 
  Colls. 
  

  

  37803. 
  Head 
  and 
  anterior 
  abdominal 
  flank-scales 
  of 
  a 
  very 
  small 
  

   fish, 
  with 
  slender 
  rostrum 
  equalling 
  nearly 
  half 
  of 
  the 
  

   total 
  length 
  of 
  the 
  cranium 
  ; 
  Solenhofen. 
  

  

  Haberlein 
  Coll. 
  

  

  P. 
  970 
  a. 
  A 
  slightly 
  larger 
  head 
  with 
  much 
  elongated 
  rostrum 
  ; 
  

   Solenhofen. 
  Egerton 
  Coll. 
  

  

  