﻿LIST 
  OF 
  ILLUSTEATIONS. 
  XI 
  

  

  TEXT 
  FIGURES. 
  

  

  Page. 
  

   Vogtia 
  spinosa 
  68 
  

  

  Diphyes 
  truncatn, 
  anterior 
  nectophore, 
  X 
  5 
  74 
  

  

  Lateral 
  aspect 
  of 
  the 
  head 
  of 
  Tanyderus 
  patagonicus. 
  a, 
  antenna; 
  b, 
  clypeus; 
  

   c, 
  maxillary 
  palpus; 
  d, 
  labrum; 
  e, 
  maxilla;/, 
  hypopharynx 
  (?); 
  g, 
  hypo- 
  

   pharynx 
  (?) 
  ; 
  h, 
  labium 
  332 
  

  

  Dorsal 
  aspect 
  of 
  the 
  head 
  of 
  Tanyderus 
  patagonicus. 
  a, 
  antenna; 
  b, 
  clypeus; 
  

  

  c, 
  maxillary 
  palpus; 
  d, 
  labrum 
  ; 
  e, 
  maxilla 
  333 
  

  

  Wing 
  of 
  Tanyderus 
  patagonicus. 
  Sc^, 
  subcosta 
  1; 
  Ri, 
  radius 
  1; 
  R^, 
  radius 
  5; 
  

  

  Ml, 
  media 
  1; 
  Cui, 
  cubitus 
  1; 
  1st 
  A, 
  anal 
  334 
  

  

  Pentoniscus 
  pruinosus 
  338 
  

  

  Pentoniscus 
  pruinosus. 
  Second 
  antennae 
  338 
  

  

  Pen 
  toniscus 
  pruinosus. 
  Maxilliped 
  338 
  

  

  Pentoniscus 
  pruinosus. 
  Inner 
  lamella 
  of 
  second 
  maxilla 
  338 
  

  

  Pentoniscus 
  pruinosus. 
  Mandible 
  338 
  

  

  Venation 
  of 
  Osmylidia 
  requieta 
  342 
  

  

  Pygidial 
  plate 
  of 
  Libellulapis 
  wilmattx 
  345 
  

  

  Second 
  submarginal 
  cell 
  of 
  Libellulapis 
  wilmattsc 
  345 
  

  

  Map 
  showing 
  distribution 
  of 
  Atlantic 
  Sipunculids 
  377 
  

  

  Dissection 
  showing 
  internal 
  structure 
  of 
  Phascolosoma 
  eremita. 
  an, 
  anus; 
  gn, 
  

   cerebral 
  ganglion; 
  go, 
  reproductive 
  organs; 
  7iph, 
  nephridiuni: 
  ib. 
  P, 
  Polian 
  

  

  tubule 
  3S7 
  

  

  Dissection 
  of 
  Phascolosoma 
  verrillii. 
  an, 
  anus; 
  go, 
  reproductive 
  organs; 
  m. 
  rtr, 
  

   retractor 
  muscle; 
  neph, 
  nephridium; 
  oc, 
  pigmented 
  eye; 
  tb. 
  Pol, 
  Polian 
  

  

  tubule 
  390 
  

  

  Posterior 
  extremity 
  of 
  Phascolosoma 
  sabellarix 
  showing 
  papillae 
  393 
  

  

  jyiesectionoi 
  Phascolosoma 
  sabellarix. 
  X 
  13J. 
  an, 
  anus; 
  (70, 
  reproductive 
  organ; 
  

  

  nph, 
  nephridium 
  393 
  

  

  Dissection 
  of 
  Phascolosoma 
  improvisum 
  from 
  off 
  Niantic 
  Bay, 
  Connecticut, 
  in 
  

   Sfathoms. 
  Intestinal 
  coil 
  not 
  shoAvn. 
  X 
  13^. 
  an, 
  anus 
  ; 
  r^r, 
  retractor 
  muscle; 
  

  

  neph, 
  nephridium; 
  n. 
  v, 
  ventral 
  nerve 
  cord; 
  oe, 
  esophagus 
  396 
  

  

  Hooks 
  from 
  introvert 
  of 
  Phascolosoma 
  cinereum 
  397 
  

  

  Dissection 
  of 
  Phascolosoma 
  cinereum. 
  X 
  5f 
  . 
  an, 
  anus; 
  go, 
  reproductive 
  organs; 
  

  

  m. 
  rtr, 
  retractor; 
  neph, 
  nephridium; 
  ib. 
  Pol, 
  Polian 
  tubule 
  397 
  

  

  Dissection 
  of 
  Phascolosoma 
  cinctum.. 
  X 
  13|. 
  an, 
  anus; 
  m. 
  col, 
  collar 
  muscle; 
  

   m. 
  rtr, 
  retractor 
  muscle; 
  nph, 
  nephridium; 
  n. 
  v, 
  ventral 
  nerve 
  cord; 
  oe, 
  esoph- 
  

   agus 
  399 
  

  

  After 
  Moltchanoff. 
  Transverse 
  section 
  of 
  the 
  atrophied 
  left 
  nephridium 
  of 
  

   Phascolion. 
  c, 
  body 
  cavity; 
  cu, 
  cuticula; 
  ep, 
  epidermis; 
  m, 
  muscular 
  layer; 
  

  

  p, 
  peritoneum 
  402 
  

  

  Phascolion 
  strombi 
  405 
  

  

  Dissection 
  of 
  Phascolion 
  strombi. 
  X 
  6|. 
  an, 
  anus; 
  dvt, 
  diverticulum; 
  go, 
  re- 
  

   productive 
  organ; 
  m. 
  rtr. 
  d, 
  dorsal 
  retractor 
  muscle; 
  neph'st, 
  nephrostome; 
  

  

  n. 
  V, 
  ventral 
  nerve 
  cord; 
  tb. 
  Pol, 
  Polion 
  tubule 
  407 
  

  

  Dissection 
  of 
  Phascolion 
  strombi 
  var. 
  Isevis. 
  X 
  6. 
  an, 
  anus; 
  m, 
  suspensory 
  mus- 
  

   cle 
  of 
  intestine; 
  m. 
  rtr. 
  d, 
  dorsal 
  retractor 
  muscle; 
  m. 
  rtr. 
  v, 
  ventral 
  retractor 
  

  

  muscle; 
  neph, 
  nephridium; 
  n. 
  v, 
  ventral 
  nerve 
  cord 
  414 
  

  

  Den/Irostoma 
  alutaceum. 
  X 
  8J. 
  an, 
  anus 
  417 
  

  

  Dissection 
  of 
  Dendrostoma 
  alutaceum. 
  X 
  10|. 
  an, 
  anus; 
  neph, 
  nephridium; 
  

  

  tb. 
  Pol, 
  Polian 
  tubule 
  418 
  

  

  Dissection 
  of 
  Physcosoma 
  capitatum. 
  X 
  4^. 
  go, 
  reproductive 
  organ; 
  7n. 
  rtr. 
  d, 
  

   dorsal 
  retractor 
  muscle; 
  m. 
  sp, 
  spindle 
  muscle; 
  neph, 
  nephridium; 
  oe, 
  

  

  esophagus 
  423 
  

  

  Diasection 
  oi 
  Aspidosiphon 
  parvulu^. 
  X 
  17J. 
  an, 
  anus; 
  m.rjr, 
  retractor 
  muscle. 
  425 
  

  

  