﻿NO. 
  1959. 
  SIPUNCULIDS 
  OF 
  EASTERX 
  XORTTT 
  AMERICA— 
  GEROULD. 
  383 
  

  

  finger-shaped 
  tentacles, 
  its 
  cylindrical 
  trunk 
  and 
  short 
  introvert, 
  and, 
  

   internally, 
  by 
  the 
  presence 
  of 
  four 
  retractor 
  muscles. 
  

  

  The 
  length 
  of 
  one 
  well-expanded 
  specimen 
  is: 
  Trunk, 
  16 
  mm.; 
  

   introvert, 
  5 
  mm.; 
  another 
  has 
  a 
  trunk 
  20 
  mm. 
  long. 
  The 
  length 
  of 
  

   the 
  introvert 
  is 
  therefore 
  slightly 
  less 
  than 
  one-third 
  that 
  of 
  the 
  trunk. 
  

   The 
  thin, 
  smooth 
  skin 
  of 
  the 
  trunk 
  is 
  everywhere 
  studded 
  with 
  

   minute 
  epidermal 
  organs, 
  which 
  are 
  most 
  clearly 
  seen 
  at 
  the 
  'posterior 
  

   end 
  of 
  the 
  body, 
  where 
  the 
  epidermis 
  is 
  marked 
  off 
  into 
  small, 
  squarish 
  

   blocks, 
  each 
  containmg 
  a 
  rounded 
  epidermal 
  organ. 
  Slightly 
  in 
  front 
  

   of 
  tliis 
  region 
  the 
  epidermal 
  organs 
  have 
  an 
  elliptical 
  contour, 
  as 
  

   described 
  by 
  Keferstein. 
  In 
  most 
  cases 
  they 
  do 
  not 
  rise 
  above 
  the 
  

   general 
  surface, 
  though 
  some 
  of 
  them 
  near 
  the 
  posterior 
  end 
  of 
  the 
  

   trunk 
  are 
  capped 
  with 
  exceedingly 
  minute 
  papillae. 
  The 
  larger 
  part 
  

   of 
  the 
  anterior 
  half 
  of 
  the 
  mtrovert 
  is 
  covered 
  with 
  about 
  20 
  distinct 
  

   ch'clets 
  of 
  hooks. 
  The 
  anterior 
  rows 
  are 
  more 
  ^videly 
  separated 
  than 
  

   the 
  posterior, 
  and 
  consist 
  of 
  slender, 
  curved, 
  yellowish-brown 
  hooks 
  

   vfiih. 
  dark-colored 
  tips. 
  The 
  smaller, 
  posterior 
  hooks 
  are 
  less 
  regu- 
  

   larly 
  arranged 
  m 
  circlets. 
  Keferstein 
  found 
  20 
  long 
  thread-like 
  

   tentacles. 
  The 
  one 
  specimen 
  which 
  I 
  examined 
  had 
  only 
  16, 
  and 
  

   they 
  were 
  short 
  and 
  finger-shaped, 
  with 
  a 
  prominent 
  longitudinal 
  

   furrow 
  along 
  the 
  oral 
  surface 
  of 
  each, 
  but 
  they 
  may 
  have 
  been 
  some- 
  

   what 
  contracted. 
  

  

  The 
  dorsal 
  retractors, 
  which 
  are 
  more 
  slender 
  than 
  the 
  ventral, 
  are 
  

   attached 
  to 
  the 
  body 
  wall 
  opposite 
  the 
  anus, 
  and 
  slightly 
  behind 
  the 
  

   nephridial 
  openings; 
  the 
  ventral 
  retractors 
  arise 
  near 
  the 
  posterior 
  

   end 
  of 
  the 
  first 
  third 
  of 
  the 
  length 
  of 
  the 
  trunk. 
  There 
  are 
  numerous 
  

   intestinal 
  coils 
  (25-30) 
  which 
  are 
  free 
  behind, 
  though 
  Keferstein 
  notes 
  

   that 
  they 
  are 
  held 
  behind 
  and 
  in 
  front, 
  respectively, 
  by 
  a 
  pair 
  of 
  

   muscle 
  strands. 
  The 
  rectum 
  is 
  very 
  short. 
  There 
  is 
  a 
  short, 
  simple 
  

   contractile 
  tube. 
  The 
  intestine 
  is 
  filled 
  with 
  calcareous 
  particles 
  — 
  

   grains 
  of 
  coral 
  sand. 
  

  

  PHASCOLOSOMA 
  PROCERUM 
  Moebius. 
  

  

  Specimens 
  were 
  taken 
  from 
  the 
  following 
  localities 
  off 
  the 
  American 
  

   coast 
  : 
  

  

  Station 
  871, 
  lat. 
  40° 
  02' 
  54" 
  N.; 
  long. 
  70° 
  23' 
  40" 
  W.; 
  115 
  fathoms, 
  

   mud 
  and 
  fine 
  sand; 
  temperature 
  at 
  bottom, 
  49° 
  F. 
  One 
  specimen. 
  

  

  Station 
  943, 
  lat. 
  40° 
  00' 
  00" 
  N; 
  long. 
  71° 
  14' 
  30" 
  W.; 
  157 
  fathoms, 
  

   mud, 
  sand, 
  shells 
  ; 
  temperature 
  at 
  bottom, 
  49° 
  F. 
  Three 
  young 
  speci- 
  

   mens. 
  

  

  Station 
  946, 
  lat. 
  39° 
  55' 
  30" 
  N.; 
  long. 
  71° 
  14' 
  00" 
  W.; 
  247 
  fathoms, 
  

   green 
  mud 
  and 
  sand; 
  temperature 
  at 
  bottom, 
  47° 
  F. 
  One 
  specimen. 
  

  

  Station 
  949, 
  lat. 
  40° 
  03' 
  00" 
  N.; 
  long. 
  70° 
  31' 
  00" 
  W.; 
  100 
  fathoms, 
  

   yellow 
  mud; 
  temperature 
  at 
  bottom, 
  52° 
  F. 
  One 
  specimen. 
  

  

  Station 
  999, 
  lat. 
  39° 
  45' 
  13" 
  N.; 
  long. 
  71° 
  30' 
  W.; 
  266 
  fathoms, 
  

   green 
  mud. 
  One 
  specimen. 
  

  

  