﻿ECllILKOlU 
  WUK.MS 
  OF 
  NUHllI 
  I'AflFlC 
  — 
  FISHER 
  219 
  

  

  Tlio 
  spcciinons 
  upon 
  svhirh 
  tliis 
  ])apfr 
  is 
  based 
  have 
  been 
  accuinu- 
  

   lati'il 
  slowly 
  over 
  a 
  considerable 
  perioti 
  of 
  3'ears.' 
  In 
  addition, 
  the 
  

   material 
  belonjrinf: 
  to 
  the 
  United 
  States 
  National 
  Museum 
  was 
  

   placed 
  at 
  my 
  disposal, 
  and 
  an 
  iiu])ortaTit 
  collection 
  belon<rin<2: 
  to 
  the 
  

   Allan 
  Hancock 
  Foundation 
  of 
  the 
  I'niviTsit}' 
  of 
  Southern 
  California 
  

   was 
  tcndereil 
  by 
  Dr. 
  C)l<;a 
  Ilartman. 
  The 
  types 
  of 
  all 
  the 
  new 
  species 
  

   are 
  in 
  the 
  collection 
  of 
  the 
  National 
  Museum. 
  

  

  The 
  followino; 
  ni'W 
  <^eiuis, 
  based 
  on 
  an 
  extralimital 
  species, 
  will 
  be 
  

   found 
  in 
  the 
  text: 
  Lissomyema, 
  tyj)e 
  Thalassema 
  mellita 
  Conn 
  (under 
  

   Listriolobus). 
  

  

  Phylum 
  Echiuroidea' 
  

  

  Ik'hiuroidea 
  Sedgwick, 
  1898, 
  p. 
  527 
  (class 
  of 
  Annelida). 
  

  

  Unsegmented. 
  bilateral, 
  fusiform 
  or 
  saccuUform 
  animals 
  with 
  

   anterior 
  mouth 
  and 
  posterior 
  anus, 
  but 
  no 
  proctodacum; 
  a 
  long 
  con- 
  

   voluted 
  alimentary 
  canal 
  lying 
  in 
  a 
  spacious 
  coelom 
  of 
  scliizocoelous 
  

   type; 
  a 
  muscular 
  body 
  wall 
  composed 
  of 
  three 
  layers, 
  of 
  which 
  the 
  

   middle 
  (with 
  one 
  I'xception) 
  is 
  composed 
  of 
  longitudinal 
  fibers; 
  with 
  

   one 
  to 
  very 
  numerous 
  anterior 
  nephridia 
  functioning 
  as 
  gonothecae; 
  

   with 
  typically 
  two 
  anal 
  vesicles 
  having 
  numerous 
  ciliated 
  fuimels 
  

   and 
  functioning 
  as 
  excretor}' 
  organs; 
  alimentary 
  canal 
  tyjiically 
  with 
  

   collateral 
  intestine 
  or 
  siphon; 
  usually 
  with 
  a 
  ])rostomial 
  proboscis, 
  

   which 
  nuiy 
  exceed 
  length 
  of 
  boily 
  but 
  which 
  is 
  sometimes 
  absent; 
  

   usually 
  with 
  ectodermal 
  setae, 
  of 
  which 
  two, 
  ventrally 
  situated 
  be- 
  

   hind 
  mouth, 
  are 
  most 
  constantly 
  present, 
  together 
  with 
  sometimes 
  

   one 
  or 
  two 
  circles 
  at 
  posterior 
  end 
  of 
  body; 
  but 
  setae 
  absent 
  in 
  a 
  few 
  

   genera; 
  ventral 
  nerve 
  cord 
  unsegmented 
  forming, 
  around 
  the 
  mouth, 
  

   a 
  loop 
  which 
  follows 
  border 
  of 
  proboscis; 
  gonad, 
  where 
  known, 
  in 
  

   mesentery 
  above 
  nerve 
  cord, 
  or 
  hi 
  the 
  mesenteries 
  surrounding 
  cloaca. 
  

  

  KEY 
  TO 
  CLASSES 
  

  

  o'. 
  Body 
  wall 
  with 
  inncniiowt 
  circular 
  or 
  oljliijiic 
  layer 
  uf 
  inu«ck's 
  well 
  dcvoloped; 
  

   anal 
  vcHicles 
  present; 
  collateral 
  intestine 
  or 
  siphon 
  well 
  developed; 
  pro- 
  

   bosciH 
  and 
  anterior 
  setae 
  present 
  in 
  nearly 
  all 
  species 
  Echiurida 
  (p. 
  220) 
  

  

  • 
  I 
  am 
  Mix-cifilly 
  ln-holflon 
  to 
  niy 
  foriiuT 
  colloiKiic 
  I'rof. 
  fii'<)rKe 
  E. 
  Mncniiilllc 
  for 
  iiiiitcriMi 
  of 
  I'rrrhit 
  

   caupo, 
  LiMriolobu* 
  prlodfM, 
  nrul 
  Ochdottoma 
  ocloinvotum; 
  to 
  Eilwnrd 
  F. 
  Kickctts 
  for 
  tlu' 
  type 
  of 
  l-xhiurua 
  

   eehiurui 
  ataikanut 
  nn<l 
  n 
  sriinll 
  colli-ctlon 
  miiric 
  by 
  lilni 
  and 
  Join) 
  Stcliilx'rk 
  In 
  the 
  (liilfof 
  C'liliforniii: 
  to 
  Dr. 
  

   Olitn 
  llHrtiiinn 
  (or 
  n 
  spccltncii 
  of 
  Limnmvrmn 
  mrlliln: 
  to 
  I'rof. 
  S. 
  K. 
  Lluht 
  for 
  ft 
  [M-rfcct 
  sihtImicii 
  of 
  lAntrMnlitu 
  

   ptlodtt; 
  Ui 
  tlm 
  Mii.wum 
  of 
  Companitivo 
  '/ool'>Ky 
  for 
  a 
  .^in'i-lmoii 
  of 
  L'reckin 
  chtlentin; 
  to 
  Dr. 
  \V. 
  I,. 
  I.loyd, 
  

   Cnbrillo 
  .Vlarlni^ 
  Miiacum, 
  San 
  I'wlro, 
  Calif., 
  for 
  the 
  loan 
  of 
  a 
  spiclnii'ii 
  of 
  Ochiloitoma 
  octorni/ntum; 
  to 
  I'rof. 
  

   John 
  n. 
  (iprnuM 
  for 
  the 
  loan 
  of 
  scvcml 
  rare 
  rcprlnU; 
  and 
  to 
  Dr. 
  Waldo 
  L. 
  Schinitt, 
  U. 
  S. 
  National 
  Museum, 
  

   for 
  numerous 
  favors. 
  

  

  • 
  Kchluroldra 
  wa.i 
  Introdutwl 
  m 
  a 
  subphylum 
  by 
  A. 
  II. 
  riark 
  (Hull. 
  Inst. 
  OcAannpr. 
  Monaco, 
  No. 
  400, 
  

   p. 
  24, 
  1021) 
  and 
  a.s 
  a 
  [iliyluni 
  by 
  W. 
  W. 
  Newby 
  (IWO. 
  p. 
  210) 
  Bn<l 
  I.lbblc 
  II. 
  Ilyinan 
  (HMO, 
  pp. 
  34, 
  M). 
  As 
  a 
  

   matter 
  of 
  record, 
  F.dwaril 
  K. 
  Hlcketls 
  wiwt 
  the 
  first 
  to 
  u.ifl 
  Kcliluroldi-a 
  aa 
  n 
  i>liyluin 
  name. 
  In 
  an 
  exwllont 
  

   semlpopulnr 
  text 
  "Betweon 
  Pacific 
  Tl«|t«" 
  (UlcketLs 
  and 
  C'ajvln, 
  19.10, 
  p. 
  272), 
  i>ertiap.s 
  incited 
  thereto 
  by 
  

   tho 
  present 
  writer 
  who 
  has 
  a>l%'ocnted 
  this 
  proc«<luro 
  to 
  his 
  classes 
  for 
  20 
  ycnrs. 
  

  

  