﻿56 
  ACTINOPTERYGII. 
  

  

  more 
  than 
  half 
  as 
  deep 
  as 
  the 
  trunk 
  at 
  its 
  point 
  of 
  origin 
  and 
  

   comprising 
  about 
  16 
  rajs 
  ; 
  anal 
  fin 
  opposed 
  to 
  the 
  hinder 
  half 
  of 
  

   the 
  dorsal, 
  the 
  longer 
  rays 
  when 
  adpressed 
  reaching 
  to 
  the 
  base 
  of 
  

   the 
  caudal. 
  Scales 
  smooth, 
  except 
  those 
  of 
  the 
  middle 
  of 
  the 
  flank, 
  

   which 
  are 
  almost 
  as 
  broad 
  as 
  deep 
  and 
  crimped 
  towards 
  their 
  

   serrated 
  posterior 
  border 
  ; 
  dorsal 
  ridge-scales 
  sharply 
  pointed. 
  

   Form. 
  Sf 
  Log. 
  Keuper 
  : 
  Coburg 
  and 
  Thuringia. 
  

  

  P. 
  7399. 
  Slab 
  of 
  sandstone 
  with 
  three 
  imperfect 
  individuals, 
  variously 
  

   crushed, 
  in 
  counterpart 
  ; 
  Coburg. 
  One 
  specimen 
  is 
  shown 
  

   of 
  the 
  natural 
  size 
  in 
  PI. 
  II. 
  fig. 
  3. 
  The 
  differences 
  in 
  

   the 
  curvature 
  of 
  the 
  dorsal 
  margin 
  are 
  conspicuous 
  and 
  

   doubtless 
  due 
  entirely 
  to 
  accidental 
  distortion. 
  Some 
  of 
  

   the 
  head 
  and 
  opercular 
  bones 
  are 
  shown, 
  ornamented 
  

   with 
  sparse 
  tuberculations 
  ; 
  and 
  part 
  of 
  the 
  upper 
  jaw 
  of 
  

   one 
  individual 
  exhibits 
  a 
  few 
  stout 
  conical 
  teeth, 
  which 
  

   were 
  not 
  improbably 
  arranged 
  upon 
  the 
  vomer, 
  while 
  

   traces 
  of 
  spaced, 
  slender, 
  styliform 
  teeth 
  occur 
  in 
  the 
  

   opposing 
  lower 
  jaw. 
  Some 
  of 
  the 
  fin-rays 
  are 
  well 
  

   displayed, 
  exhibiting 
  the 
  unjointed 
  base 
  and 
  the 
  very 
  close 
  

   articulations 
  beyond. 
  Purchased, 
  1884. 
  

  

  P. 
  3623. 
  Obscure 
  remains 
  of 
  small 
  specimen 
  ; 
  Coburg. 
  

  

  Ennishillen 
  Coll. 
  

  

  Semionotus 
  kapffi, 
  Praas. 
  

  

  1861. 
  Semionotus 
  kapffii, 
  0. 
  Fraas, 
  Wiirtt. 
  Jahresh. 
  vol. 
  xvii. 
  pp. 
  91, 
  95, 
  

   pi. 
  i. 
  figs. 
  1-3. 
  

  

  Type. 
  Imperfect 
  fishes 
  ; 
  Stuttgart 
  Museum. 
  

  

  A 
  small 
  species, 
  about 
  two 
  and 
  a 
  half 
  times 
  as 
  long 
  as 
  its 
  maximum 
  

   depth, 
  attaining 
  a 
  length 
  of 
  about 
  0*1. 
  Trunk 
  deeply 
  fusiform, 
  the 
  

   depth 
  of 
  the 
  caudal 
  pedicle 
  not 
  more 
  than 
  one-third 
  as 
  great 
  as 
  the 
  

   maximum 
  depth 
  of 
  the 
  abdominal 
  region. 
  Head 
  with 
  opercular 
  

   apparatus 
  occupying 
  nearly 
  one-quarter 
  of 
  the 
  total 
  length 
  ; 
  snout 
  

   acutely 
  pointed. 
  Pelvic 
  fins 
  arising 
  much 
  nearer 
  to 
  the 
  anal 
  than 
  

   to 
  the 
  pectoral 
  fins 
  ; 
  median 
  fins 
  as 
  in 
  the 
  type 
  species. 
  Scales 
  

   smooth 
  and 
  not 
  serrated, 
  those 
  of 
  the 
  middle 
  of 
  the 
  flank 
  much 
  

   deeper 
  than 
  broad 
  : 
  dorsal 
  ridge-scales 
  produced 
  into 
  slender 
  points. 
  

  

  Form. 
  Sf 
  Log. 
  Middle 
  Keuper 
  : 
  Wurtemberg. 
  

  

  38654-58. 
  Ten 
  small 
  slabs 
  of 
  sandstone 
  with 
  remains 
  of 
  several 
  

   individuals 
  ; 
  Haslach, 
  near 
  Stuttgart. 
  Purchased, 
  1864. 
  

  

  P. 
  1545. 
  Imperfect 
  specimen, 
  wanting 
  the 
  caudal 
  extremity 
  ; 
  

   Haslach. 
  Egerton 
  Coll. 
  

  

  