﻿CoLENso, 
  — 
  On 
  the 
  Oeims 
  Callorhyncliiis. 
  299 
  

  

  never 
  seen 
  before 
  ; 
  I 
  knew 
  it 
  was 
  of 
  the 
  genus 
  Callorhynchus, 
  and, 
  as 
  I 
  

   thought, 
  distinct 
  from 
  G. 
  antaroticus 
  (the 
  only 
  species 
  of 
  that 
  genus 
  then 
  

   known 
  to 
  me), 
  so 
  I 
  took 
  a 
  sketch 
  drawing 
  of 
  it, 
  with 
  notes 
  of 
  its 
  dimensions, 
  

   etc., 
  wliich 
  I 
  now 
  give. 
  

  

  Callorhi/ncJius 
  dasycaitdatus, 
  mihi. 
  

  

  Total 
  length, 
  3ft. 
  3in.; 
  girth, 
  (belly) 
  1ft. 
  5in.; 
  length 
  of 
  pectoral 
  fin, 
  9in.; 
  

   first 
  dorsal 
  fin, 
  Sin. 
  ; 
  of 
  attached 
  bony 
  ray, 
  7in. 
  ; 
  length 
  of 
  tail, 
  from 
  angle 
  

   in 
  upper 
  surface, 
  12in. 
  ; 
  length 
  from 
  snout 
  to 
  anterior 
  base 
  of 
  first 
  dorsal 
  

   fin., 
  9i-in, 
  ; 
  the 
  bony 
  ray 
  in 
  front 
  of 
  the 
  first 
  dorsal 
  fin 
  is 
  partly 
  separated 
  

   from 
  that 
  fin, 
  it 
  is 
  a 
  little 
  curved, 
  and 
  barbed 
  slightly 
  on 
  the 
  posterior 
  edge 
  ; 
  

   the 
  extremity 
  of 
  the 
  tail 
  is 
  free 
  and 
  feathered, 
  which, 
  being 
  such 
  a 
  great 
  

   peculiarity 
  and 
  so 
  very 
  characteristic 
  of 
  this 
  sxoecies, 
  has 
  given 
  rise 
  to 
  its 
  

   pecific 
  name. 
  Whole 
  fish 
  silvery 
  white, 
  but 
  highly 
  iridescent 
  ; 
  the 
  fins 
  of 
  

   dark 
  gre}^ 
  colour. 
  It 
  had 
  no 
  teeth, 
  only 
  palatal 
  bones 
  ; 
  a 
  crayfish 
  was 
  

   found 
  in 
  its 
  maw. 
  

  

  In 
  its 
  produced 
  whip-like 
  tail 
  and 
  barbed 
  dorsal 
  spine 
  this 
  species 
  

   approaches 
  more 
  nearly 
  to 
  its 
  northern 
  cougener, 
  Chimcsra 
  arctica, 
  Linn., 
  

   formerly 
  the 
  type 
  of 
  the 
  genus, 
  before 
  that 
  Callorhynchus 
  was 
  separated 
  from 
  

   it 
  by 
  Cuvier. 
  

  

  Captain 
  Hutton, 
  in 
  the 
  work 
  above 
  cited 
  (p. 
  74), 
  gives 
  as 
  a 
  character 
  of 
  

   this 
  genus, 
  "extremity 
  of 
  the 
  tail 
  distinctly 
  turned 
  upwards:" 
  I 
  scarcely 
  

   understand 
  this 
  ; 
  such 
  is 
  certainly 
  not 
  the 
  case 
  in 
  the 
  one 
  species 
  mentioned 
  

   by 
  him 
  as 
  belonging 
  to 
  these 
  seas, 
  C. 
  antarcticus 
  ; 
  neither 
  does 
  any 
  such 
  char= 
  

   acter 
  belong 
  to 
  C. 
  austr 
  alls, 
  —^noihex 
  of 
  our 
  species, 
  which 
  I 
  have 
  also 
  seen. 
  

   Both 
  of 
  those 
  species 
  also 
  differ 
  widely 
  from 
  G. 
  dasycaiulatia, 
  in 
  the 
  very 
  

   large 
  size 
  of 
  their 
  pectorals, 
  wliich 
  overlap? 
  the 
  base 
  of 
  their 
  ventrals. 
  

   Drawings 
  of 
  the 
  tails 
  of 
  those 
  two 
  species 
  I 
  also 
  give 
  in 
  the 
  subjoined 
  plate. 
  

  

  I 
  also 
  note 
  that 
  Dr. 
  Eichardson, 
  in 
  a 
  paper 
  on 
  some 
  new 
  Tasmanian 
  

   fishes, 
  read 
  before 
  the 
  Zoological 
  Society 
  in 
  1839, 
  has 
  another 
  new 
  species, 
  

   C. 
  tasmanius, 
  which 
  may 
  also 
  be 
  found 
  here 
  in 
  our 
  seas 
  ; 
  I 
  have, 
  however, 
  

   never 
  seen 
  it. 
  It 
  differs 
  fi-om 
  those 
  two 
  species 
  last 
  mentioned 
  in 
  the 
  size 
  

   of 
  its 
  pectorals 
  ; 
  in 
  which 
  respect 
  it 
  approaches 
  to 
  G. 
  dasycaudatus. 
  Dr. 
  

   Eichardson 
  gives 
  the 
  following 
  characters 
  to 
  distinguish 
  it 
  fi'om 
  G. 
  antarcticus 
  

   (probably 
  at 
  that 
  time 
  G. 
  australis 
  vfSiS 
  unknown 
  to 
  him)—" 
  pinnis 
  i^ectoralibus 
  

   ad 
  ventrales 
  hand 
  attingentibus 
  ; 
  ^ji«?i« 
  dorsi 
  secundd 
  pone 
  ventrales 
  incijnenti, 
  

   ante 
  lobum 
  anteriorem 
  inferiorem 
  loinnm 
  caudm 
  desinenti." 
  And 
  then 
  he 
  adds 
  : 
  

   " 
  This 
  species 
  agrees 
  with 
  the 
  Gallorhynchus 
  smythi 
  of 
  Benne, 
  figured 
  in 
  

   Beechy's 
  Zoological 
  Appendix, 
  in 
  the 
  distance 
  between 
  the 
  pectorals 
  and 
  

   ventrals, 
  but 
  is 
  so 
  u.nnke 
  that 
  figure 
  in 
  other 
  respects 
  that 
  it 
  is 
  impossible 
  to 
  

   assign 
  it 
  to 
  that 
  species." 
  Of 
  this 
  last 
  mentioned 
  species 
  (G. 
  smythi), 
  I 
  

   know 
  no 
  more 
  than 
  what 
  I 
  have 
  here 
  quoted 
  ; 
  should 
  it 
  be 
  found 
  in 
  our 
  

   seas, 
  then, 
  we 
  may 
  probably 
  count 
  on 
  having 
  five 
  species 
  of 
  this 
  genus. 
  

  

  