﻿EUGXATHIDJi. 
  357 
  

  

  P. 
  6364. 
  The 
  type 
  specimen, 
  a 
  waterworn 
  piece 
  of 
  sandstone 
  with 
  

   imperfect 
  coiled-up 
  fish 
  ; 
  Wealden, 
  Hastings. 
  The 
  fish 
  is 
  

   partly 
  exposed 
  on 
  both 
  sides 
  of 
  the 
  slab, 
  and 
  portions 
  of 
  

   its 
  pectoral 
  fin, 
  squamation, 
  and 
  vertebral 
  centra 
  are 
  

   shown 
  of 
  the 
  natural 
  size 
  in 
  PI. 
  VIII. 
  figs. 
  5, 
  5 
  a, 
  b. 
  The 
  

   head 
  and 
  opercular 
  apparatus 
  are 
  too 
  imperfect 
  for 
  

   description, 
  but 
  traces 
  of 
  the 
  characteristic 
  external 
  orna- 
  

   ment 
  are 
  preserved 
  both 
  on 
  the 
  cranial 
  roof 
  and 
  on 
  the 
  

   cheek-plates. 
  The 
  middle 
  of 
  the 
  parasphenoid 
  exhibits 
  a 
  

   cluster 
  of 
  small 
  teeth 
  ; 
  and 
  its 
  lateral 
  ascending 
  portion 
  is 
  

   forked, 
  the 
  anterior 
  limb 
  rising 
  as 
  usual 
  to 
  meet 
  the 
  post- 
  

   frontal, 
  the 
  posterior 
  limb 
  reaching 
  one 
  of 
  the 
  hinder 
  otic 
  

   elements. 
  A 
  horizontal 
  (not 
  median) 
  section 
  across 
  one 
  

   of 
  the 
  short 
  abdominal 
  vertebras 
  is 
  shown 
  in 
  fig. 
  5 
  a 
  ; 
  

   and 
  one 
  of 
  the 
  three 
  elongated 
  centra, 
  as 
  exposed 
  in 
  the 
  

   anterior 
  part 
  of 
  the 
  caudal 
  region, 
  is 
  shown 
  in 
  side 
  view 
  

   in 
  fig. 
  5 
  b. 
  The 
  latter 
  are 
  followed 
  by 
  other 
  centra 
  not 
  

   so 
  much 
  elongated, 
  but 
  still 
  longer 
  than 
  deep. 
  The 
  

   clavicle 
  and 
  pectoral 
  fin 
  are 
  preserved 
  on 
  the 
  left 
  side, 
  

   the 
  latter 
  comprising 
  not 
  less 
  than 
  24 
  rays, 
  of 
  which 
  each 
  

   is 
  undivided 
  in 
  its 
  proximal 
  two-thirds 
  but 
  becomes 
  very 
  

   finely 
  branched 
  and 
  articulated 
  distally. 
  A 
  portion 
  of 
  

   the 
  largest 
  postclavicular 
  plate 
  on 
  the 
  same 
  side 
  (p.cl.) 
  

   displays 
  the 
  characteristic 
  external 
  ornamentation. 
  The 
  

   scales 
  are 
  all 
  remarkably 
  smooth, 
  exhibiting 
  no 
  markings 
  

   beyond 
  feeble, 
  scattered 
  pits 
  ; 
  and 
  the 
  serration 
  of 
  their 
  

   hinder 
  border 
  is 
  extremely 
  fine 
  and 
  inconspicuous. 
  Even 
  

   the 
  principal 
  flank-scales 
  are 
  broader 
  than 
  deep, 
  while 
  the 
  

   ventral 
  scales 
  are 
  not 
  only 
  extremely 
  narrowed 
  but 
  also 
  

   become 
  in 
  part 
  subdivided. 
  Beckles 
  Coll. 
  

  

  Neorhombolepis 
  (?) 
  punctatus 
  (A. 
  S. 
  Woodward). 
  

  

  1844. 
  Lepidotus 
  punctatus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol, 
  ii. 
  pt. 
  i. 
  p. 
  306 
  

  

  (name 
  only). 
  

   1844. 
  Lepidotus 
  punctulatus, 
  L. 
  Agassiz, 
  ibid. 
  pt. 
  ii. 
  p. 
  287 
  (name 
  

  

  only). 
  

   1888. 
  Genus 
  non 
  det., 
  A. 
  S. 
  Woodward, 
  Proc. 
  Geol. 
  Assoc, 
  vol. 
  x. 
  

  

  p. 
  304, 
  pi. 
  i. 
  fig. 
  2. 
  

  

  Type. 
  Detached 
  scales 
  ; 
  British 
  Museum. 
  

  

  A 
  species 
  known 
  only 
  from 
  detached 
  scales, 
  and 
  doubtfully 
  placed 
  

   in 
  Neorhombolepis. 
  The 
  largest 
  known 
  scale 
  measures 
  0-015 
  in 
  

   breadth, 
  and 
  none 
  are 
  so 
  deep 
  as 
  broad 
  ; 
  all 
  specimens 
  exhibit 
  a 
  

   smooth 
  external 
  layer 
  of 
  ganoine, 
  marked 
  with 
  a 
  few 
  punctations, 
  

  

  