﻿ON 
  THE 
  BRANCHIAL 
  VESSELS 
  OF 
  STERNASPIS. 
  

  

  List 
  of 
  References. 
  

  

  1. 
  Bergh, 
  R. 
  S.— 
  "Eeitr. 
  z. 
  veigl. 
  Histologie," 
  II, 
  'Anat. 
  Hefte/ 
  vol. 
  xiv, 
  

  

  1900. 
  

  

  2. 
  Clapauede. 
  — 
  " 
  Aimelides 
  Chetopodes 
  du 
  Golfe 
  de 
  Naple." 
  

  

  3. 
  Goodrich, 
  E. 
  S.— 
  "Notes 
  on 
  the 
  Anatomy 
  of 
  Sternaspis," 
  'Quart. 
  Journ. 
  

  

  Micr. 
  Sci.,' 
  vol. 
  xl, 
  1897. 
  

  

  4. 
  RiETSCH, 
  M. 
  — 
  "Etude 
  sur 
  le 
  Sternaspis 
  scutata," 
  'Ann. 
  Sci. 
  Nat.,' 
  

  

  Ge 
  ser., 
  Zool., 
  vol. 
  xiii, 
  1882. 
  

  

  5. 
  Vejdovsky, 
  F. 
  — 
  " 
  Unters. 
  iiber 
  die 
  Anatomie, 
  etc., 
  von 
  Sternaspis," 
  

  

  ' 
  Denkschr. 
  d. 
  Wien. 
  Akad. 
  Math.-Naturw. 
  CI.,' 
  vol. 
  xliii, 
  1882. 
  

   e. 
  Vejdovsky, 
  E. 
  — 
  "Bemerk. 
  z. 
  neueren 
  u. 
  jilteren 
  Literatur 
  iiber 
  Ster- 
  

   naspis 
  scutata," 
  'Litz. 
  d. 
  k. 
  Bolim. 
  Gesellscli. 
  d. 
  Wissensliaften 
  , 
  

   1882. 
  

  

  EXPLANATION 
  OF 
  PLATES 
  1 
  & 
  2, 
  

  

  Illustrating 
  Mr. 
  Edwin 
  S. 
  Groodi-ich's 
  paper, 
  ''On 
  the 
  

   Branchial 
  Vessels 
  of 
  Sternaspis." 
  

  

  List 
  of 
  Eeference 
  Letters. 
  

  

  ax. 
  Axial 
  rod. 
  axe. 
  Cell 
  of 
  axial 
  rod. 
  bio. 
  Blood-vessel. 
  Zi;'(?. 
  Brancliint^ 
  

   cell 
  resting 
  on 
  axial 
  rod. 
  c. 
  Coelomic 
  canal, 
  cbw. 
  Cut 
  body-wall. 
  ci. 
  Inner 
  

   coat. 
  CO. 
  Outer 
  coat. 
  cov. 
  Cut 
  wall 
  of 
  ovisac, 
  clt. 
  Connecting 
  strands 
  of 
  

   tissue, 
  cv. 
  Communicating 
  vessel, 
  dbv. 
  Dorsal 
  branchial 
  vessel, 
  do. 
  Main 
  

   dorsal 
  vessel, 
  ep. 
  Epidermis, 
  gf. 
  Gill 
  fllament. 
  lis. 
  Horizontal 
  septum. 
  

   i. 
  Intestine. 
  Idb. 
  Limb 
  of 
  dorsal 
  vessel, 
  ludbv. 
  Lumen 
  of 
  dorsal 
  branchial 
  

   vessel. 
  71. 
  Nucleus 
  of 
  ring-shaped 
  cell. 
  na. 
  Nucleus 
  of 
  axial 
  rod-cell. 
  

   7ic. 
  Nerve-cord. 
  7iet. 
  Protoplasmic 
  contractile 
  network, 
  oa. 
  Outer 
  hyaline 
  

   layer 
  of 
  axial 
  rod. 
  oc. 
  Outer 
  layer 
  of 
  cuticle, 
  ovd. 
  Oviduct, 
  p. 
  Point 
  at 
  

   which 
  the 
  communicating 
  vessel 
  joins 
  the 
  dorsal 
  branchial 
  vessel, 
  r. 
  Rectum. 
  

   s. 
  Septum, 
  sb. 
  Supporting 
  band 
  of 
  tissue, 
  stc. 
  Stalk 
  of 
  the 
  axial 
  rod-cell. 
  

   th. 
  Restraining 
  thread 
  of 
  valvular 
  plug, 
  vbv. 
  Ventral 
  branchial 
  vessel, 
  tf. 
  

   Valvular 
  fold. 
  vp. 
  Valvular 
  plug. 
  vv. 
  Main 
  ventral 
  vessel. 
  

  

  PLATb: 
  1. 
  

  

  Fig. 
  1. 
  — 
  Enlarged 
  view 
  of 
  a 
  dissection 
  of 
  the 
  binder 
  region 
  of 
  a 
  female 
  

   Sternaspis, 
  seen 
  from 
  above. 
  Portions 
  of 
  the 
  ovisac, 
  of 
  the 
  rectum, 
  and 
  of 
  

   yoL. 
  48, 
  part 
  1. 
  — 
  new 
  sekies. 
  2 
  

  

  