﻿NO. 
  1959. 
  SIPUNCULIDS 
  OF 
  EASTERN 
  NORTH 
  AMERICA— 
  OEROVLD. 
  395 
  

  

  the 
  hermaphroditism 
  of 
  minutum, 
  in 
  reference 
  to 
  which 
  he 
  says: 
  "Paul 
  

   hat 
  sichcr 
  nebcn 
  den 
  Eiern 
  immer 
  Spermien 
  und 
  ihre 
  Bildungsstadien 
  

   angetroffen, 
  wie 
  er 
  es 
  beschrieben 
  hat, 
  und 
  das 
  auch 
  bei 
  ein 
  und 
  

   demselben 
  Individuum 
  von 
  PJi. 
  sahellarise 
  Th6el." 
  

  

  In 
  view 
  of 
  such 
  trustworthy 
  testimony 
  I 
  have 
  made 
  a 
  renewed 
  

   search 
  for 
  evidences 
  of 
  hermaphroditism 
  in 
  the 
  specimens 
  from 
  station 
  

   2084, 
  but 
  the 
  examination) 
  of 
  three 
  males 
  full 
  of 
  sperm 
  and 
  of 
  several 
  

   females 
  containing 
  oocytes 
  gives 
  only 
  negative 
  results, 
  though 
  it 
  does 
  

   not 
  of 
  course 
  exclude 
  the 
  possibility 
  of 
  hermaphi'oditism 
  if 
  we 
  assume, 
  

   as 
  Paul 
  does, 
  that 
  an 
  individual 
  may 
  successively 
  produce 
  ova 
  and 
  

   thereafter 
  sperm. 
  

  

  If 
  further 
  investigation 
  should 
  show 
  that 
  these 
  forms 
  from 
  European 
  

   waters 
  are 
  identical 
  and 
  hermaphroditic, 
  and 
  that 
  the 
  one 
  just 
  de- 
  

   scribed 
  from 
  the 
  American 
  coast 
  is 
  dioecious, 
  it 
  may 
  be 
  necessary 
  to 
  

   give 
  the 
  latter 
  a 
  new 
  name; 
  in 
  which 
  case 
  I 
  would 
  suggest 
  PJiasco- 
  

   losoma 
  diaphanes, 
  new 
  species. 
  In 
  other 
  respects 
  the 
  American 
  form 
  

   closely 
  resembles 
  the 
  form 
  described 
  as 
  Ph. 
  sahellarise 
  Theel, 
  and 
  

   varies 
  only 
  slightly 
  (in 
  the 
  thinness 
  of 
  the 
  body 
  wall) 
  from 
  the 
  earlier 
  

   described 
  Phascolosoma 
  (Petalostoma) 
  minutum 
  Keferstein. 
  

  

  PHASCOLOSOMA 
  IMPROVISUM 
  Theel. 
  

   [= 
  PHASCOLOSOMA 
  (PETALOSTOMA) 
  MINUTUM 
  Keferstein?]. 
  

  

  Under 
  this 
  name 
  Theel 
  (1905) 
  described 
  a 
  form 
  with 
  distinct 
  

   papillae 
  on 
  the 
  posterior 
  end 
  of 
  the 
  trunk 
  and 
  on 
  the 
  introvert, 
  and 
  a 
  

   girdle 
  of 
  hooks 
  behind 
  the 
  short, 
  rounded 
  tentacles. 
  Otherwise 
  this 
  

   type 
  appears 
  to 
  be 
  identical 
  with 
  Ph. 
  saheJlarix 
  Tlieel, 
  and 
  Paul 
  (1909) 
  

   regards 
  both 
  forms 
  as 
  identical 
  with 
  Petalostoma 
  minutum 
  Keferstein. 
  

   However 
  this 
  may 
  be, 
  I 
  shall 
  tentatively 
  apply 
  the 
  name 
  to 
  certain 
  

   small 
  sipunculids 
  in 
  the 
  United 
  States 
  National 
  Musuem 
  from 
  the 
  

   following 
  localities: 
  

  

  Station 
  2234, 
  lat. 
  39° 
  09' 
  N.; 
  long. 
  72° 
  03' 
  15" 
  W. 
  (east 
  of 
  New 
  

   Jersey) 
  in 
  green 
  mud, 
  from 
  810 
  fathoms; 
  temperature 
  at 
  bottom, 
  

   38.6° 
  F. 
  One 
  specimen. 
  

  

  Station 
  549, 
  off 
  Niantic 
  Bay, 
  Connecticut, 
  from 
  a 
  sandy 
  bottom, 
  5 
  

   fathoms. 
  Twelve 
  specimens. 
  

  

  Thus 
  it 
  appears 
  that 
  this 
  form 
  lives 
  in 
  shallow 
  water 
  near 
  the 
  shore, 
  

   as 
  is 
  the 
  case 
  in 
  Sweden, 
  but 
  it 
  also 
  is 
  found 
  at 
  a 
  long 
  distance 
  from 
  

   shore 
  and 
  at 
  a 
  depth 
  of 
  810 
  fathoms. 
  In 
  these 
  respects 
  it 
  resembles 
  

   the 
  closely 
  alUed 
  or 
  identical 
  form 
  Ph. 
  sabellarise. 
  Theel 
  in 
  this 
  country, 
  

   which 
  in 
  Sweden 
  has 
  been 
  found 
  only 
  near 
  the 
  shore 
  with 
  Ph. 
  

   improvisum. 
  

  

  The 
  largest 
  specimen 
  was 
  the 
  one 
  taken 
  from 
  the 
  off-shore 
  station, 
  

   the 
  trunk 
  of 
  which 
  measures 
  10 
  mm. 
  The 
  largest 
  specimen 
  from 
  

   Niantic 
  Bay 
  has 
  a 
  total 
  length 
  of 
  13 
  mm. 
  (introvert 
  5 
  mm., 
  trunk 
  8 
  

   mm.). 
  Another 
  has 
  an 
  introvert 
  of 
  3 
  mm., 
  a 
  trunk 
  of 
  4.5 
  mm. 
  

  

  