﻿268 
  ACTINOPTERYGII. 
  

  

  P. 
  4003, 
  P. 
  4742 
  a. 
  Head 
  and 
  part 
  of 
  abdominal 
  region, 
  vertically- 
  

   crushed, 
  and 
  cleft 
  along 
  the 
  plane 
  of 
  the 
  dentition 
  ; 
  

   Hakel. 
  The 
  tuberculated 
  roof 
  of 
  the 
  skull 
  is 
  shown, 
  with 
  

   its 
  great, 
  laterally 
  compressed, 
  solid 
  occipital 
  spine 
  ; 
  and 
  

   behind 
  the 
  occiput 
  are 
  portions 
  of 
  a 
  pair 
  of 
  large 
  unorna- 
  

   mented 
  plates 
  too 
  imperfect 
  for 
  determination. 
  No 
  sutures 
  

   can 
  be 
  observed 
  in 
  the 
  cranial 
  roof, 
  and 
  the 
  ethmoidal 
  

   extension 
  is 
  very 
  narrow. 
  The 
  dentition 
  agrees 
  with 
  

   that 
  of 
  the 
  preceding 
  specimen; 
  and 
  the 
  pectoral 
  arch 
  

   again 
  shows 
  the 
  three 
  spines, 
  with 
  some 
  fragments 
  appa- 
  

   rently 
  of 
  fin-rays. 
  The 
  short 
  ribs 
  are 
  also 
  well-preserved. 
  

  

  Lewis 
  Coll. 
  

  

  39227. 
  Imperfect 
  cranium, 
  with 
  complete 
  occipital 
  spine, 
  in 
  side 
  

   view, 
  shown 
  of 
  the 
  natural 
  size 
  in 
  PL 
  XVI. 
  fig. 
  4; 
  

   Hakel. 
  The 
  base 
  of 
  the 
  skull 
  is 
  bent 
  sharply 
  down- 
  

   wards 
  at 
  the 
  anterior 
  extremity 
  of 
  the 
  otic 
  region 
  ; 
  and 
  

   the 
  median 
  ethmoidal 
  plate 
  is 
  shown 
  in 
  advance 
  of 
  the 
  

   orbit. 
  Tristram 
  Coll. 
  

  

  P. 
  3767. 
  Vomerine 
  dentition 
  doubtfully 
  ascribed 
  to 
  this 
  species 
  ; 
  

   Hakel. 
  The 
  dentigerous 
  surface 
  is 
  convex 
  from 
  side 
  to 
  

   side, 
  and 
  the 
  teeth 
  are 
  closely 
  arranged 
  in 
  five 
  series. 
  

   They 
  are 
  irregular 
  in 
  form, 
  not 
  rounded 
  ; 
  and 
  only 
  a 
  few 
  

   of 
  those 
  placed 
  anteriorly 
  exhibit 
  feeble 
  traces 
  of 
  an 
  apical 
  

   pit. 
  Ennishillen 
  Coll. 
  

  

  Coccodus 
  lindstroemi, 
  Davis. 
  

  

  1890. 
  Coccodus 
  lindstroemi, 
  J. 
  W. 
  Davis, 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  

   vol. 
  xlvi. 
  p. 
  565, 
  pi. 
  xxii. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  State 
  Museum, 
  Stockholm. 
  

  

  A 
  smaller 
  species 
  than 
  the 
  type, 
  distinguished 
  by 
  the 
  relatively 
  

   larger 
  size 
  of 
  the 
  head 
  and 
  the 
  coarse 
  denticulations 
  on 
  the 
  hinder 
  

   border 
  of 
  the 
  occipital 
  spine. 
  

  

  In 
  the 
  type 
  specimen 
  the 
  occipital 
  spine 
  is 
  evidently 
  crushed 
  

   backwards, 
  and 
  the 
  description 
  of 
  the 
  remains 
  of 
  the 
  opercular 
  

   apparatus 
  by 
  Davis 
  is 
  based 
  on 
  too 
  fragmentary 
  evidence 
  to 
  be 
  

   accepted 
  as 
  correct. 
  

  

  Form, 
  fy 
  Loc. 
  Upper 
  Senonian 
  : 
  Hakel, 
  Mt. 
  Lebanon, 
  Syria. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  As 
  pointed 
  out 
  by 
  J. 
  W. 
  Davis 
  (Trans. 
  Roy. 
  Dublin 
  Soc. 
  [2] 
  

   vol. 
  iii. 
  1887, 
  p. 
  548), 
  the 
  splenial 
  dentition 
  from 
  Hakel 
  described 
  

   under 
  the 
  name 
  of 
  Gyrodus 
  syriacus 
  by 
  0. 
  Fraas 
  (Aus 
  dem 
  Orient, 
  

  

  