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  355 
  

  

  Genus 
  NEORHOMBOLEPIS, 
  A. 
  S. 
  Woodward. 
  

  

  [Proc. 
  Geol. 
  Assoc, 
  vol. 
  x. 
  1888, 
  p. 
  304.] 
  

  

  Trunk 
  elongate-fusiform, 
  and 
  head 
  relatively 
  large. 
  External 
  

   head-bones 
  and 
  the 
  opercular 
  bones 
  robust, 
  more 
  or 
  less 
  ornamented 
  

   with 
  tubercles 
  and 
  rugas 
  of 
  enamel 
  ; 
  maxilla 
  with 
  a 
  straight 
  denti- 
  

   gerous 
  border, 
  and 
  a 
  long 
  supramaxillary 
  bone 
  ; 
  teeth 
  in 
  regular 
  

   series, 
  large 
  and 
  hollow, 
  nearly 
  as 
  large 
  on 
  some 
  of 
  the 
  inner 
  bones 
  

   as 
  on 
  the 
  margin 
  of 
  the 
  jaw, 
  but 
  short 
  and 
  tubercular 
  on 
  the 
  

   entopterygoid 
  ; 
  suboperculum 
  at 
  least 
  half 
  as 
  large 
  as 
  the 
  nearly 
  

   rectangular 
  operculum, 
  and 
  separated 
  from 
  the 
  latter 
  by 
  an 
  almost 
  

   horizontally-extended 
  suture. 
  Vertebral 
  centra 
  completely 
  ossified, 
  

   much 
  shorter 
  than 
  deep 
  in 
  the 
  abdominal, 
  more 
  elongated 
  in 
  the 
  

   caudal 
  region. 
  Pectoral 
  fins 
  relatively 
  large, 
  with 
  an 
  especially 
  robust 
  

   preaxial 
  ray 
  ; 
  [other 
  fins 
  unknown]. 
  Scales 
  thick, 
  with 
  a 
  narrow 
  

   overlapped 
  border 
  not 
  produced 
  at 
  the 
  angles, 
  and 
  the 
  peg-and-socket 
  

   articulation 
  feeble 
  or 
  wanting 
  ; 
  superficial 
  ganoine 
  nearly 
  smooth 
  ; 
  

   few 
  principal 
  flank-scales 
  as 
  deep 
  as 
  broad, 
  the 
  majority 
  broader 
  than 
  

   deep, 
  and 
  those 
  of 
  numerous 
  ventral 
  series 
  at 
  least 
  twice 
  as 
  broad 
  

   as 
  deep. 
  

  

  Neorhombolepis 
  excelsus, 
  A. 
  8. 
  Woodward. 
  

   [Plate 
  Till. 
  fig. 
  4.] 
  

  

  1888. 
  Neorhombolepis 
  excelsus, 
  A. 
  S, 
  Woodward, 
  Proc. 
  Geol. 
  Assoc, 
  

   vol. 
  x. 
  p. 
  304, 
  pi. 
  i. 
  fig. 
  1. 
  

  

  Type. 
  Imperfect 
  anterior 
  portion 
  of 
  fish 
  ; 
  British 
  Museum. 
  

  

  The 
  type 
  species, 
  with 
  head 
  attaining 
  a 
  length 
  of 
  about 
  0*085. 
  

   External 
  bones 
  ornamented 
  with 
  closely- 
  arranged 
  elongated 
  

   tubercles 
  and 
  short 
  rugae 
  of 
  ganoine 
  ; 
  marginal 
  teeth 
  slender, 
  with 
  

   incurved 
  apex, 
  in 
  a 
  close 
  regular 
  series, 
  and 
  those 
  of 
  the 
  maxilla 
  

   almost 
  as 
  large 
  as 
  those 
  of 
  the 
  dentary. 
  Preaxial 
  pectoral 
  fin-ray 
  

   ornamented 
  with 
  elongated 
  tubercles 
  and 
  rugge 
  of 
  ganoine. 
  Large 
  

   postclavicular 
  scales 
  ornamented 
  as 
  the 
  head-bones, 
  other 
  scales 
  

   smooth 
  ; 
  scales 
  of 
  the 
  ventral 
  abdominal 
  region 
  very 
  much 
  elon- 
  

   gated, 
  often 
  nearly 
  three 
  times 
  as 
  broad 
  as 
  deep, 
  and 
  some 
  with 
  

   two 
  or 
  three 
  coarse 
  denticulations 
  on 
  the 
  hinder 
  margin. 
  

  

  Form. 
  Sf 
  Loc. 
  Turonian 
  : 
  Kent. 
  

  

  43077. 
  The 
  type 
  specimen, 
  comprising 
  the 
  imperfect 
  head, 
  abdo- 
  

   minal 
  region, 
  and 
  right 
  pectoral 
  fin, 
  shown 
  of 
  the 
  natural 
  

   size 
  in 
  PL 
  YIII. 
  fig. 
  4 
  ; 
  Lower 
  Chalk, 
  Upper 
  Hailing, 
  

   Kent. 
  In 
  the 
  original 
  description 
  of 
  the 
  fossil, 
  only 
  the 
  

   portion 
  behind 
  the 
  cranium 
  is 
  noticed, 
  the 
  imperfect 
  head 
  

  

  2 
  a 
  2 
  

  

  