﻿166 
  Prof. 
  M'Intosh's 
  Notes 
  from 
  the 
  

  

  unusually 
  long. 
  The 
  bristles 
  are 
  proportionally 
  longer 
  than 
  

   in 
  C. 
  setosa, 
  and 
  their 
  bases 
  have 
  a 
  deep 
  brown 
  tinge. 
  

  

  Besides 
  the 
  foregoing, 
  two 
  fragmentary 
  examples 
  ( 
  x 
  ) 
  

   apparently 
  agreeing 
  with 
  C. 
  setosa 
  occur, 
  but 
  as 
  only 
  the 
  

   anterior 
  region 
  is 
  present 
  in 
  each, 
  there 
  is 
  doubt. 
  The 
  

   snout 
  in 
  one 
  is 
  acutely 
  conical, 
  whereas 
  in 
  the 
  other 
  it 
  is 
  

   retracted 
  into 
  a 
  blunt 
  cone, 
  and 
  reddish-brown 
  pigment 
  

   marks 
  the 
  origin 
  of 
  each 
  capillary 
  bristle-bundle, 
  both 
  

   dorsally 
  and 
  ventrally. 
  

  

  Chcetozone 
  carpenteri 
  *. 
  

  

  The 
  anterior 
  region 
  of 
  a 
  form 
  presenting 
  characteristic 
  

   features 
  was 
  dredged 
  in 
  the 
  ' 
  Porcupine 
  ' 
  Expedition 
  of 
  

   1870 
  in 
  Bono 
  Bay, 
  on 
  the 
  coast 
  of 
  Algiers, 
  in 
  25 
  fathoms. 
  

   It 
  also 
  appeared 
  off 
  Cape 
  Guardia, 
  off 
  Cape 
  Finisterre, 
  

   in 
  the 
  same 
  Expedition. 
  It 
  is 
  a 
  somewhat 
  larger 
  and 
  

   more 
  rounded 
  form 
  and 
  does 
  not 
  show 
  the 
  dorsal 
  and 
  

   ventral 
  grooves 
  of 
  C. 
  setosa. 
  The 
  snout 
  (PI. 
  VI. 
  fig. 
  5) 
  is 
  

   somewhat 
  longer 
  than 
  in 
  the 
  common 
  form 
  and 
  in 
  one 
  has 
  

   a 
  dark 
  speck 
  on 
  each 
  side 
  at 
  the 
  posterior 
  border 
  of 
  the 
  

   prostomium, 
  and 
  these 
  specks 
  are 
  best 
  seen 
  on 
  the 
  ventral 
  

   surface, 
  or 
  from 
  the 
  front 
  ; 
  the 
  mouth 
  opens 
  on 
  the 
  ventral 
  

   surface, 
  a 
  short 
  distance 
  behind 
  them. 
  The 
  body 
  has 
  the 
  

   usual 
  fusiform 
  shape, 
  its 
  largest 
  diameter 
  being 
  about 
  the 
  

   anterior 
  third. 
  The 
  bristles, 
  which 
  stretch 
  from 
  each 
  side 
  

   with 
  an 
  upward 
  and 
  backward 
  curve, 
  are 
  proportionally 
  

   longer 
  than 
  in 
  C. 
  setosa. 
  They 
  commence 
  as 
  considerable 
  

   tufts 
  in 
  the 
  first 
  foot, 
  the 
  slightly 
  yellow 
  shaft 
  being 
  con- 
  

   stricted 
  about 
  the 
  level 
  of 
  the 
  skiu, 
  and 
  then 
  the 
  tip 
  flattens 
  

   out 
  more 
  in 
  the 
  shorter 
  and 
  less 
  in 
  the 
  long 
  forms, 
  and 
  

   finally 
  tapers 
  to 
  a 
  long 
  hair-like 
  curved 
  extremity. 
  The 
  

   broader 
  blades 
  (PL 
  VI. 
  fig. 
  5 
  a) 
  readily 
  split 
  in 
  this 
  region 
  

   so 
  as 
  to 
  make 
  a 
  brush-like 
  appearance, 
  the 
  direction 
  being 
  

   downward 
  and 
  backward. 
  The 
  most 
  characteristic 
  feature, 
  

   however, 
  is 
  the 
  appearance 
  about 
  the 
  tenth 
  foot 
  of 
  crotchets 
  

   in 
  the 
  dorsal 
  and 
  then 
  in 
  the 
  ventral 
  division 
  (PL 
  VI. 
  

   fig. 
  ab). 
  In 
  this 
  foot 
  (tenth) 
  the 
  bristles 
  have 
  attained 
  

   great 
  length, 
  the 
  dorsal 
  being 
  considerably 
  longer 
  than 
  the 
  

   ventral, 
  the 
  slight 
  constriction 
  below 
  the 
  long 
  flattened 
  blade 
  

   being 
  noteworthy, 
  as 
  well 
  as 
  the 
  length 
  of 
  the 
  attenuate 
  tip. 
  

   Those 
  injured 
  show 
  the 
  brush-like 
  fractures 
  already 
  alluded 
  

   to. 
  The 
  shorter 
  forms 
  have 
  stouter 
  shafts, 
  and 
  by 
  a 
  little 
  

   modification 
  the 
  crotchets 
  (PL 
  VI. 
  fig. 
  5 
  c), 
  which 
  are 
  still 
  

  

  * 
  Named 
  after 
  the 
  late 
  Dr. 
  W. 
  B. 
  Carpenter. 
  

  

  