﻿Campbell. 
  — 
  On 
  a 
  new 
  Fish. 
  297 
  

  

  The 
  substance 
  of 
  back 
  and 
  top 
  of 
  bead, 
  when 
  first 
  out 
  of 
  water, 
  quite 
  

   transparent; 
  belly 
  white; 
  iris 
  of 
  eye 
  silvery, 
  pupil 
  black, 
  upper 
  and 
  lower 
  

   sides 
  silvery, 
  but 
  lateral 
  band 
  bright 
  polished 
  metallic 
  silver. 
  

  

  Total 
  length 
  .. 
  .. 
  .. 
  ■ 
  .. 
  .. 
  ..6-9 
  inches. 
  

  

  Length 
  of 
  head 
  .. 
  .. 
  .. 
  .. 
  .. 
  1-6 
  ,, 
  

  

  Length 
  of 
  head, 
  body 
  and 
  tail 
  (exclusive 
  of 
  caudal 
  fin) 
  . 
  . 
  . 
  . 
  6-15 
  ,, 
  

  

  Distance 
  from 
  snout 
  to 
  commencement 
  of 
  dorsal 
  .. 
  .. 
  2*8 
  ,, 
  

  

  „ 
  ,, 
  ,, 
  ,, 
  ventrals 
  . 
  . 
  . 
  . 
  3'1 
  „ 
  

  

  „ 
  ,, 
  ,, 
  ,, 
  anal 
  .. 
  .. 
  5-0 
  „ 
  

  

  Width 
  of 
  eye, 
  horizontal 
  dialmeter, 
  -45 
  inch 
  ; 
  vertical 
  diameter, 
  '4 
  inch 
  

   Greatest 
  depth 
  of 
  body 
  (under 
  commencement 
  1st 
  dorsal) 
  . 
  . 
  I'O 
  „ 
  

  

  Length, 
  base, 
  1st 
  dorsal, 
  -5 
  inch 
  ; 
  height, 
  1 
  inch 
  

  

  ,, 
  ventrals, 
  -75 
  ,, 
  

  

  ,, 
  pectorals, 
  "To 
  ,, 
  

  

  ,, 
  base 
  of 
  anal, 
  -55 
  ,, 
  height, 
  -55 
  inch 
  

  

  Distance 
  between 
  commencement 
  1st 
  dorsal 
  and 
  adipose 
  .. 
  . 
  2-55 
  ,, 
  

  

  ,, 
  „ 
  ,, 
  ventrals 
  and 
  anal 
  .. 
  .. 
  1-9 
  ,, 
  

  

  ,, 
  ,, 
  adipose 
  dorsal 
  and 
  commencement 
  caudal 
  . 
  . 
  -9 
  

  

  „ 
  ,, 
  commencement 
  anal 
  and 
  commencement 
  caudal 
  1-18 
  

  

  Short 
  diameter 
  of 
  eye 
  (vertical), 
  J 
  length 
  of 
  head 
  

   Length 
  of 
  head 
  is 
  to 
  body 
  and 
  tail 
  as 
  16 
  is 
  to 
  61 
  

  

  ,, 
  ,, 
  is 
  to 
  total 
  length 
  as 
  16 
  is 
  to 
  69 
  

  

  Greatest 
  depth 
  of 
  body 
  is 
  to 
  total 
  length 
  as 
  10 
  is 
  to 
  69 
  

  

  ,, 
  ,, 
  ,, 
  is 
  to 
  total 
  length 
  of 
  head, 
  body, 
  and 
  tail, 
  as 
  10 
  is 
  to 
  61 
  

  

  Distance 
  from 
  snout 
  to 
  commencement 
  ventrals, 
  3*1 
  inches 
  

  

  „ 
  „ 
  commencement 
  anal 
  to 
  end 
  of 
  tail, 
  3-1 
  inches. 
  

  

  Akt. 
  XXVII.— 
  On 
  a 
  new 
  Fish. 
  By 
  W. 
  D. 
  Campbell, 
  C.E., 
  F.G.S. 
  

  

  [Read 
  before 
  the 
  Westland 
  Institute, 
  8th 
  January, 
  1879.] 
  

   The 
  following 
  description 
  is 
  of 
  a 
  new 
  genus 
  of 
  fish, 
  four 
  specimens 
  of 
  which 
  

   were 
  obtained 
  by 
  myself 
  on 
  the 
  18fch 
  of 
  May 
  last, 
  on 
  the 
  Hokitika 
  beach. 
  

   It 
  has 
  very 
  marked 
  peculiarities. 
  The 
  single 
  dorsal, 
  and 
  the 
  stout 
  spinous 
  

   rays 
  in 
  both 
  it 
  and 
  the 
  anal, 
  connected 
  by 
  a 
  perforated 
  membrane, 
  presents 
  

   entirely 
  distinct 
  characters 
  from 
  any 
  previously 
  described 
  genus. 
  The 
  most 
  

   nearly 
  allied 
  appears 
  to 
  be 
  the 
  genus 
  Brama. 
  There 
  is 
  a 
  possibility 
  that 
  

   the 
  specimens 
  obtained 
  are 
  young, 
  but 
  the 
  characteristic 
  points 
  described 
  

   below 
  appear 
  uniformly 
  in 
  them 
  all. 
  

  

  Fam. 
  ScoMBEiD^. 
  

  

  Group 
  5. 
  Coryphccnina^ 
  

  

  Genus 
  nov. 
  Discus. 
  

  

  Body 
  compressed 
  and 
  elevated 
  ; 
  general 
  form 
  circular-pointed 
  at 
  snout 
  

  

  and 
  tail* 
  Head 
  and 
  lower 
  portion 
  of 
  body 
  scaleless, 
  minute 
  scales 
  on 
  

  

  a8 
  

  

  