﻿272 
  Mr. 
  J. 
  W. 
  Pryde 
  on 
  Annelida 
  PolycJiceta 
  

  

  maJdy 
  Bay. 
  It 
  is 
  also 
  found 
  off 
  fclie 
  shores 
  of 
  Norway 
  {Sars) 
  

   and 
  off 
  the 
  Mediterranean 
  shores 
  of 
  France. 
  

  

  The 
  largest 
  specimen 
  lias 
  about 
  60 
  segments 
  and 
  is 
  fusi- 
  

   form 
  in 
  shape. 
  The 
  body 
  dilates 
  behind 
  the 
  iiead, 
  reaches 
  its 
  

   maximum 
  about 
  the 
  anterior 
  third, 
  and 
  then 
  tapers 
  to 
  the 
  

   taih 
  The 
  tail 
  terminates 
  in 
  two 
  modeiately 
  long 
  slender 
  cirri, 
  

   while 
  the 
  dorsum 
  has 
  a 
  lustrous 
  brown 
  colour, 
  which 
  is 
  trans- 
  

   versely 
  banded 
  at 
  intervals 
  with 
  belts 
  of 
  fine 
  iridescent 
  blue. 
  

   In 
  tiie 
  largest 
  specimen 
  nine 
  such 
  bands 
  were 
  seen, 
  besides 
  

   several 
  minor 
  streaks 
  which 
  become 
  fainter 
  and 
  fainter 
  poste- 
  

   riorly. 
  When 
  the 
  animal 
  was 
  placed 
  in 
  spirit 
  the 
  colours 
  

   instantly 
  disappeared, 
  while 
  the 
  animal 
  itself 
  broke 
  up 
  into 
  

   Iragments. 
  The 
  same 
  thing, 
  according 
  to 
  the 
  Monograph, 
  

   takes 
  place 
  on 
  the 
  immersion 
  of 
  the 
  animal 
  in 
  fresh 
  water 
  or 
  

   in 
  impure 
  sea-water. 
  

  

  Many 
  specimens 
  show 
  an 
  extruded 
  proboscis, 
  which 
  is 
  

   j)roportionately 
  large, 
  but 
  is 
  devoid 
  of 
  papillae 
  or 
  jaws. 
  In 
  

   the 
  extruded 
  condition 
  the 
  proboscis 
  is 
  cylindrical, 
  but 
  in 
  

   some 
  there 
  was 
  a 
  swollen 
  basal 
  region. 
  The 
  buccal 
  opening- 
  

   is 
  capable 
  of 
  great 
  dilatation. 
  No 
  specimen 
  showed 
  signs 
  of 
  

   maturity. 
  

  

  Ophiodromus 
  Jlexuosufi 
  does 
  not 
  appear 
  in 
  the 
  'Challenger' 
  

   Reports, 
  but 
  an 
  allied 
  form, 
  Salvatona 
  kergaelensis, 
  is 
  referred 
  

   to. 
  No 
  mention 
  of 
  it 
  is 
  made 
  by 
  Prof. 
  Izuka, 
  of 
  Japan. 
  

  

  Genus 
  Castalia, 
  Savigny, 
  1S20. 
  

   Castalia 
  fusca, 
  Johnston, 
  1836. 
  

  

  This 
  annelid 
  was 
  obtained 
  in 
  dredge 
  7 
  at 
  a 
  depth 
  of 
  

   15 
  fathoms. 
  In 
  all 
  there 
  are 
  five 
  complete 
  specimens 
  and 
  

   six 
  fragments. 
  The 
  specimens 
  are 
  very 
  small, 
  the 
  largest 
  

   only 
  measuring 
  | 
  inch. 
  They 
  usually 
  are 
  found 
  in 
  much 
  

   shallower 
  water, 
  for 
  they 
  occur 
  between 
  tide-marks 
  at 
  various 
  

   points 
  around 
  the 
  British 
  shores. 
  In 
  Shetland 
  they 
  are 
  

   common 
  in 
  the 
  roots 
  of 
  tangles 
  in 
  the 
  Larainarian 
  region. 
  

   Keferstein 
  obtained 
  this 
  species 
  at 
  St. 
  Vaast, 
  Normandy, 
  

   Claparbdeat 
  Naples, 
  Cams 
  m 
  the 
  Mediterranean, 
  and 
  Marion 
  

   at 
  Marseilles; 
  but 
  tliere 
  is 
  no 
  word 
  of 
  it 
  in 
  the 
  Re[)orts 
  of 
  the 
  

   ' 
  Challenger 
  ' 
  Expedition 
  nor 
  in 
  the 
  ' 
  Errantiate 
  Polychteta 
  

   of 
  Japan.' 
  

  

  The 
  specimens 
  are 
  reddish 
  brown 
  and 
  have 
  a 
  well-marked 
  

   dark 
  line 
  down 
  the 
  dorsum. 
  This 
  line 
  is 
  the 
  dorsal 
  blood- 
  

   vessel. 
  The 
  segments 
  number 
  about 
  50, 
  slightly 
  narrowed 
  

   in 
  front, 
  and 
  then 
  they 
  narrow 
  more 
  and 
  more 
  towards 
  the 
  

   tail-region, 
  which 
  terminates 
  in 
  two 
  slender 
  cirri. 
  One 
  

   specimen 
  had 
  a 
  short, 
  cylindrical, 
  and 
  somewhat 
  massive 
  

  

  