﻿PYCNODONTUXffl. 
  267 
  

  

  thirds 
  of 
  the 
  depth 
  of 
  the 
  head 
  at 
  its 
  insertion 
  ; 
  its 
  sides 
  marked 
  

   with 
  fine, 
  regular 
  longitudinal 
  ridges, 
  and 
  the 
  anterior 
  and 
  posterior 
  

   margins 
  delicately 
  serrated. 
  Yomerine 
  teeth 
  triangular 
  in 
  form, 
  

   mammillated, 
  and 
  closely 
  arranged, 
  the 
  median 
  series 
  considerably 
  

   larger 
  than 
  the 
  flanking 
  series 
  and 
  alternating 
  with 
  the 
  latter 
  ; 
  

   splenial 
  dentition 
  imperfectly 
  known, 
  but 
  the 
  teeth 
  with 
  hollowed 
  

   crown 
  and 
  blunt 
  lateral 
  extremities. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Senonian 
  : 
  Mt. 
  Lebanon, 
  Syria. 
  

  

  P. 
  4742. 
  Imperfect 
  laterally 
  compressed 
  specimen, 
  described 
  and 
  

   figured 
  by 
  Davis, 
  loc. 
  cit. 
  ; 
  Hakel. 
  The 
  original 
  descrip- 
  

   tion 
  is 
  not 
  altogether 
  accurate, 
  and 
  requires 
  some 
  supple- 
  

   menting 
  and 
  correction. 
  The 
  yomer 
  is 
  crushed 
  so 
  that 
  

   part 
  of 
  its 
  dentition 
  is 
  exposed, 
  displaying 
  the 
  three 
  

   series 
  of 
  teeth 
  as 
  described 
  in 
  the 
  above 
  diagnosis 
  ; 
  and 
  

   the 
  two 
  principal 
  series 
  of 
  the 
  right 
  splenial 
  are 
  also 
  

   shown 
  from 
  the 
  oral 
  aspect. 
  So 
  far 
  as 
  can 
  be 
  ascertained, 
  

   the 
  inferior 
  expanded 
  extremity 
  of 
  the 
  left 
  half 
  of 
  the 
  

  

  Tig. 
  32. 
  

  

  Coccodus 
  armatus 
  ; 
  left 
  clavicle, 
  outer 
  aspect. 
  [No. 
  P. 
  4742.] 
  

  

  pectoral 
  arch 
  has 
  the 
  form 
  indicated 
  in 
  the 
  accompanying 
  

   diagrammatic 
  sketch 
  (fig. 
  32), 
  there 
  being 
  one 
  anterior, 
  

   and 
  two 
  posteriorly 
  directed 
  spines. 
  The 
  right 
  half 
  of 
  the 
  

   arch 
  in 
  this 
  specimen 
  has 
  been 
  displaced 
  and 
  overturned, 
  

   and 
  the 
  angle 
  between 
  the 
  two 
  posterior 
  spines 
  increased 
  

   by 
  fracture. 
  The 
  facial 
  and 
  opercular 
  bones, 
  and 
  some 
  

   elements 
  behind 
  the 
  occiput, 
  are 
  too 
  much 
  crushed 
  for 
  

   precise 
  recognition; 
  and 
  little 
  can 
  be 
  said 
  of 
  the 
  axial 
  

   skeleton 
  of 
  the 
  trunk 
  beyond 
  noting 
  that 
  it 
  exhibits 
  the 
  

   ordinary 
  Pycnodont 
  characters. 
  There 
  are 
  short 
  ribs 
  in 
  

   the 
  abdominal 
  region. 
  The 
  remains 
  of 
  the 
  anal 
  fin 
  

   opposed 
  to 
  the 
  dorsal 
  are 
  very 
  fragmentary, 
  and 
  only 
  

   part 
  of 
  the 
  lower 
  lobe 
  of 
  the 
  caudal 
  fin 
  is 
  preserved. 
  

  

  Lewis 
  Coll. 
  

  

  