﻿SEMIONOTID^!. 
  65 
  

  

  Aphnelepis 
  austral 
  is, 
  A. 
  S. 
  Woodward. 
  

  

  [Described 
  in 
  forthcoming 
  Mem. 
  Geol. 
  Surv. 
  N. 
  S. 
  Wales, 
  Palaeont, 
  

  

  no. 
  9, 
  with 
  drawings 
  on 
  pi. 
  iii. 
  figs. 
  1-4.] 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Geol. 
  Survey 
  Museum, 
  Sydney. 
  

  

  The 
  type 
  species, 
  attaining 
  a 
  length 
  of 
  about 
  # 
  2. 
  Length 
  of 
  head 
  

   with 
  opercular 
  apparatus 
  contained 
  about 
  one-and-a-half 
  times 
  in 
  

   the 
  maximum 
  depth 
  of 
  the 
  trunk, 
  and 
  somewhat 
  less 
  than 
  one- 
  

   quarter 
  of 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  the 
  caudal 
  pedicle 
  one-third 
  

   as 
  deep 
  as 
  the 
  abdominal 
  region 
  at 
  its 
  highest 
  point, 
  where 
  the 
  

   dorsal 
  fin 
  arises. 
  Pelvic 
  fins 
  arising 
  opposite 
  the 
  origin 
  of 
  the 
  

   dorsal, 
  and 
  the 
  latter 
  completely 
  in 
  advance 
  of 
  the 
  anal 
  ; 
  dorsal 
  rays 
  

   about 
  14, 
  anal 
  rays 
  10 
  in 
  number. 
  Scales 
  ornamented 
  with 
  coarse 
  

   crimpings, 
  which 
  are 
  slightly 
  radiating 
  and 
  usually 
  confined 
  to 
  the 
  

   hinder 
  half. 
  

  

  Form. 
  <$f 
  Log. 
  Upper 
  Hawkesbury-Wianamatta 
  Series 
  : 
  Talbralgar, 
  

   New 
  South 
  Wales. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  A 
  large 
  variety 
  of 
  Aphnelepis, 
  perhaps 
  identical 
  with 
  A. 
  australis, 
  

   is 
  also 
  described 
  and 
  figured, 
  he. 
  cit. 
  pi. 
  iii. 
  fig. 
  5. 
  

  

  Genus 
  SERROLEPIS, 
  Quenstedt 
  

   [Handb. 
  Petrefakt. 
  1852, 
  p. 
  207.] 
  

  

  An 
  indefinable 
  genus 
  founded 
  upon 
  detached 
  flank-scales. 
  These 
  

   scales 
  much 
  deeper 
  than 
  broad, 
  with 
  a 
  straight 
  narrow 
  overlapped 
  

   margin, 
  a 
  large 
  peg-and-socket 
  articulation, 
  and 
  no 
  sharp 
  inner 
  keel 
  ; 
  

   the 
  exposed 
  portion 
  ornamented 
  with 
  transverse 
  ridges, 
  terminating 
  

   in 
  denticulations 
  at 
  the 
  posterior 
  border. 
  

  

  A 
  fragment 
  of 
  jaw, 
  exhibiting 
  a 
  close 
  series 
  of 
  stout 
  styliform 
  

   teeth, 
  is 
  described 
  by 
  Dames 
  as 
  having 
  been 
  found 
  in 
  association 
  

   with 
  the 
  scales 
  (Palaeont. 
  Abhandl. 
  vol. 
  iv. 
  1888, 
  p. 
  172, 
  pi. 
  xiii. 
  

   fig. 
  8). 
  It 
  may 
  possibly 
  pertain 
  to 
  the 
  same 
  genus. 
  

  

  Serrolepis 
  suevicus, 
  Dames. 
  

   1852. 
  Serrolepis, 
  F. 
  A. 
  Quenstedt, 
  Handb. 
  Petrefakt. 
  p. 
  207, 
  pi. 
  xvii. 
  

  

  fig. 
  13. 
  

   1888. 
  Serrolepis 
  suevicus, 
  W. 
  Dames, 
  Palseont. 
  Abhandl. 
  vol. 
  iv. 
  p. 
  171, 
  

  

  pi. 
  xiii. 
  figs. 
  4-7 
  (? 
  8). 
  

  

  Type. 
  Isolated 
  scales 
  ; 
  Tubingen 
  University 
  Museum. 
  

  

  The 
  type 
  species, 
  known 
  only 
  by 
  isolated 
  scales, 
  of 
  which 
  the 
  

   largest 
  measure 
  about 
  0-015 
  in 
  total 
  depth, 
  and 
  are 
  four 
  times 
  as 
  

   deep 
  as 
  broad 
  in 
  their 
  exposed 
  portion. 
  Posterior 
  denticulations 
  

  

  PART 
  III. 
  f 
  

  

  