﻿THE 
  ANNALS 
  

  

  AND 
  

  

  MAGAZINE 
  OF 
  NATURAL 
  HISTORY. 
  

  

  [SIXTH 
  SERIES.] 
  

   No. 
  15. 
  MARCH 
  1889. 
  

  

  XVIII. 
  — 
  Contributions 
  to 
  the 
  Anatomy 
  of 
  the 
  Central 
  Nervous 
  

   System 
  in 
  Ceratodus 
  Forsteri. 
  By 
  Alfred 
  Sanders, 
  

   M.R.C.S., 
  F.L.S. 
  

  

  [Plates 
  VIII.-XIII.] 
  

  

  Ceratodus 
  has 
  been 
  known 
  for 
  so 
  short 
  a 
  time 
  that 
  the 
  litera- 
  

   ture 
  of 
  its 
  nervous 
  system 
  is 
  by 
  no 
  means 
  extensive 
  ; 
  three 
  

   memoirs 
  exhaust 
  the 
  list 
  of 
  those 
  that 
  refer 
  to 
  that 
  subject 
  — 
  

   one 
  by 
  Prof. 
  Huxley 
  *, 
  another 
  by 
  Beauregard 
  f, 
  and 
  a 
  third 
  

   by 
  Prof. 
  Burt. 
  G. 
  Wilder 
  J, 
  to 
  which, 
  may 
  be 
  added 
  two 
  others 
  

   which 
  touch 
  only 
  slightly 
  or 
  not 
  at 
  all 
  on 
  the 
  nervous 
  system 
  ; 
  

   these 
  are 
  a 
  very 
  full 
  account 
  of 
  the 
  anatomy 
  of 
  Ceratodus 
  by 
  

   Dr. 
  Gunther 
  §, 
  a 
  memoir 
  which 
  first 
  introduced 
  the 
  animal 
  to 
  

   the 
  notice 
  of 
  scientific 
  men, 
  and 
  another, 
  more 
  recent, 
  by 
  H. 
  

   Ayers 
  ||, 
  which 
  goes 
  more 
  into 
  the 
  microscopic 
  anatomy. 
  

  

  * 
  u 
  Contributions 
  to 
  Morphology. 
  Ichthyopsida. 
  — 
  No. 
  1. 
  On 
  Ceratodus 
  

   Forsteri,'" 
  Proc, 
  Zool. 
  Soc. 
  1876. 
  

  

  t 
  " 
  Encephale 
  et 
  Nerfs 
  Craniens 
  du 
  Ceratodus 
  Forsteri" 
  Journ. 
  de 
  

   l'Anatoniie 
  et 
  Phys., 
  Oh. 
  Robin 
  and 
  G. 
  Pouchet, 
  1881. 
  

  

  X 
  "The 
  Dipnoan 
  Brain, 
  Ceratodus." 
  American 
  Naturalist, 
  vol. 
  xxi. 
  

   1887. 
  

  

  § 
  Phil. 
  Trans. 
  Roy. 
  Soc. 
  1871. 
  

  

  || 
  " 
  Beitrage 
  z. 
  Anatomie 
  und 
  Physiologie 
  d. 
  Dipnoer," 
  Jenaische 
  

   Zeitschrift 
  f. 
  Naturwissenschaft, 
  Bd. 
  xviii. 
  

  

  Ann. 
  & 
  Mag. 
  N. 
  Hist. 
  Ser. 
  6. 
  Vol. 
  iii. 
  12 
  

  

  