﻿ECHIUROID 
  WORMS 
  OF 
  NORTH 
  PACIFIC 
  — 
  FISHER 
  287 
  

  

  Ml, 
  iiitorbftsal 
  muscle 
  of 
  sctao; 
  X, 
  iiophridiiiin; 
  \C, 
  nerve 
  cord; 
  0, 
  esoph- 
  

   ag:iis; 
  P, 
  pharynx; 
  P\ 
  posterior 
  end 
  of 
  pharynx; 
  8, 
  seta;«Si/, 
  anterior 
  end 
  of 
  

   siphon; 
  VM, 
  ventral 
  mesentery; 
  X, 
  parasite. 
  

  

  Plate 
  23 
  

  

  Ochetostoma 
  octomyotum, 
  new 
  species 
  

  

  1, 
  Dissection, 
  X 
  2; 
  the 
  spiral 
  funnels 
  of 
  the 
  nephridia 
  and 
  longitudinal 
  muscle 
  

  

  hands 
  have 
  been 
  omitted 
  except 
  the 
  midventral, 
  which 
  is 
  lighter 
  shaded. 
  

  

  2, 
  Interval 
  between 
  right 
  ventrolateral 
  and 
  lateral 
  muscles 
  at 
  middle 
  of 
  body 
  

  

  showing 
  fascicles 
  of 
  the 
  oblique 
  layer. 
  On 
  the 
  lower 
  left 
  corner 
  the 
  oblique 
  

   layer 
  has 
  been 
  removed, 
  X 
  20. 
  

  

  3, 
  Cloaca 
  and 
  adjacent 
  part 
  of 
  intestine 
  opened 
  to 
  show 
  relation 
  with 
  intestinal 
  

  

  coecum 
  and 
  anal 
  vesicles, 
  X 
  5. 
  

   Lettering 
  as 
  for 
  plate 
  24. 
  

  

  Pl.\te 
  24 
  

  

  Ochetostoma 
  octomyotum, 
  new 
  species 
  

  

  The 
  anterior 
  portion 
  of 
  plate 
  23, 
  figure 
  1, 
  enlarged 
  X 
  5 
  and 
  with 
  addition 
  of 
  

   details. 
  

  

  A, 
  anus; 
  AV, 
  anal 
  vesicles; 
  AV\ 
  their 
  opening 
  into 
  cloaca; 
  B', 
  dorsal 
  blood 
  ves- 
  

   sel; 
  D*, 
  ring 
  vessel; 
  IP, 
  neurointestinal 
  connective 
  of 
  which 
  B^ 
  is 
  merely 
  a 
  

   part; 
  B*, 
  ventral 
  vessel; 
  C, 
  stomach; 
  CF, 
  ciliated 
  funnel 
  or 
  nephrostome; 
  

   CG, 
  ciliated 
  groove 
  of 
  intestine; 
  CI, 
  cloaca; 
  DM, 
  dorsal 
  mesentery 
  of 
  pharynx, 
  

   G, 
  gizzard; 
  IC, 
  intestinal 
  coecum; 
  IC\ 
  its 
  opening 
  into 
  cloaca; 
  MC, 
  outer 
  

   circular 
  muscle 
  layer; 
  MD, 
  dorsal 
  muscle 
  band; 
  MDL, 
  dorsolateral 
  muscle 
  

   band; 
  ML, 
  lateral 
  muscle 
  band; 
  MO, 
  oblique 
  inner 
  layer 
  of 
  muscles; 
  MVL, 
  

   ventrolateral 
  muscle 
  band; 
  N, 
  nephridium; 
  NC, 
  nerve 
  cord; 
  O, 
  esophagus; 
  

   P, 
  pharynx; 
  S, 
  seta; 
  Si, 
  siphon; 
  Sil, 
  entrance 
  to 
  siphon; 
  Si2, 
  end 
  of 
  siphon; 
  

   VM, 
  ventral 
  mesentery 
  of 
  pharynx. 
  

  

  Plate 
  25 
  

  

  Arhynchite 
  inamoenua, 
  new 
  species 
  

  

  1, 
  \'entral 
  view 
  of 
  paratype, 
  X 
  1. 
  

  

  2, 
  Seta 
  of 
  type, 
  X 
  10. 
  

  

  3, 
  Di.s.section 
  of 
  anterior 
  complex 
  of 
  type, 
  X 
  7, 
  showing 
  foregut 
  in 
  situ. 
  

  

  4, 
  Skin 
  of 
  figure 
  1, 
  from 
  near 
  midventral 
  lino, 
  enlarged. 
  

  

  ."J, 
  TyjK>, 
  X 
  7; 
  the 
  interbasal 
  muscle 
  has 
  been 
  cut 
  aii<l 
  the 
  liberatod 
  foregut 
  drawn 
  

  

  to 
  the 
  right; 
  ventral 
  mesentery 
  is 
  dotted. 
  

   B', 
  B*, 
  B*, 
  dorsal, 
  neurointestinal, 
  and 
  ventral 
  blood 
  ves.sels, 
  respectively; 
  CF, 
  

  

  nephrostome; 
  C, 
  gizzard; 
  M, 
  mouth; 
  MI, 
  interbasal 
  muscle; 
  A^, 
  nephridium; 
  

  

  NC, 
  nerve 
  cord; 
  O, 
  e.soi>hagus; 
  P, 
  ])liarynx; 
  S, 
  8(;ta. 
  

  

  Plate 
  2G 
  

  

  BonelliopKig 
  aUiHknnn, 
  new 
  geriu.M 
  and 
  sjjecies 
  

  

  1, 
  Di.s.Hoction 
  of 
  si)ecirnen 
  from 
  I'liala-Hka, 
  dorsal 
  view, 
  X 
  4. 
  

  

  2, 
  Ti]) 
  of 
  one 
  of 
  the 
  priinar\- 
  l)rancheH 
  of 
  an 
  anal 
  vesicle, 
  showing 
  two 
  secondary 
  

  

  branches 
  with 
  their 
  ciliated 
  funnels, 
  X 
  50. 
  

  

  3, 
  One 
  of 
  the 
  ciliated 
  funnels, 
  X 
  200. 
  

  

  4, 
  Nephrostome, 
  X 
  10. 
  

  

  