﻿232 
  Prof. 
  Carl 
  Chun 
  on 
  the 
  

  

  a 
  sterile 
  .fecial 
  nectocalyx, 
  which 
  may 
  be 
  identical 
  with 
  the 
  

   Eudoxia 
  described 
  by 
  Eschscholz 
  * 
  under 
  the 
  same 
  name. 
  I 
  

   need 
  hardly 
  note 
  that 
  the 
  abundant 
  material 
  at 
  hand 
  gave 
  me 
  

   the 
  opportunity 
  of 
  tracing 
  the 
  development 
  of 
  the 
  Eudoxia- 
  

   groups 
  on 
  the 
  stem 
  through 
  all 
  phases 
  up 
  to 
  their 
  separation. 
  

   Eudoxia 
  Lessonii, 
  like 
  all 
  the 
  Eudoxise 
  of 
  the 
  genus 
  Diphyes, 
  

   is 
  dioecious. 
  In 
  the 
  older 
  Endoxiae 
  I 
  generally 
  found 
  a 
  

   mature 
  gonocalyx 
  with 
  a 
  second 
  smaller 
  one 
  and 
  two 
  bud- 
  

   rudiments 
  of 
  a 
  third 
  and 
  fourth 
  calyx. 
  The 
  special 
  necto- 
  

   calyx, 
  into 
  which 
  the 
  calycal 
  bud 
  first 
  formed 
  on 
  the 
  stem 
  is 
  

   developed, 
  persists 
  and 
  is 
  not 
  displaced 
  by 
  sterile 
  reserve- 
  

   calyces. 
  

  

  Hackel 
  can 
  only 
  rely 
  upon 
  suppositions 
  in 
  regarding 
  

   Eudoxia 
  (Cucullus) 
  Lessonii 
  as 
  derived 
  from 
  the 
  Diphyes 
  

   (ijijn 
  ndiculata 
  insufficiently 
  described 
  by 
  Eschscholtz. 
  

  

  Older 
  specimens 
  of 
  D. 
  campanulifera 
  possessed 
  a 
  sulphur- 
  

   yellow 
  subumbrella 
  on 
  both 
  calyces. 
  The 
  special 
  necto- 
  

   calyx 
  of 
  Eudoxia 
  Lessonii, 
  which 
  is 
  furnished 
  with 
  yellow 
  

   spots, 
  has 
  usually 
  a 
  delicate 
  emerald-green 
  lustre. 
  

  

  Subfam. 
  II. 
  Abylidm, 
  Ag. 
  

  

  Besides 
  the 
  characters 
  given 
  by 
  Agassiz 
  and 
  Hackel, 
  it 
  

   may 
  be 
  indicated 
  as 
  characteristic 
  of 
  the 
  Abylida? 
  that 
  their 
  

   Eudoxia?, 
  in 
  contrast 
  to 
  those 
  of 
  the 
  Epibulidie, 
  are 
  mon- 
  

   oecious. 
  

  

  14. 
  Abyla 
  trigona, 
  Q. 
  & 
  G. 
  

  

  From 
  the 
  middle 
  of 
  December 
  onwards 
  Abyla 
  trigona 
  

   occurred, 
  at 
  first 
  in 
  single 
  specimens, 
  but 
  later 
  on 
  (at 
  the 
  end 
  

   of 
  February 
  and 
  in 
  March) 
  in 
  great 
  swarms. 
  That 
  their 
  

   groups 
  of 
  appendages 
  become 
  developed 
  into 
  Amphirrhoa 
  

   alata, 
  Lesueur, 
  which 
  I 
  regard 
  as 
  identical 
  with 
  Eudoxia 
  

   tn'gona, 
  Gegenb., 
  was 
  rightly 
  supposed 
  by 
  Huxley, 
  and 
  

   proved 
  by 
  Gegenbaur 
  (loc. 
  cit. 
  p. 
  347). 
  I 
  met 
  with 
  the 
  Am- 
  

   phirrhoa 
  as 
  early 
  as 
  October. 
  

  

  15. 
  Bassia 
  perforata 
  [Bassia 
  quadrilateral, 
  Q. 
  & 
  G., 
  Abyla 
  

   bassensis, 
  Huxl., 
  Abyla 
  perforata, 
  Gegenb.). 
  

  

  The 
  present 
  species, 
  wdiich 
  was 
  undoubtedly 
  discovered 
  by 
  

   Quoy 
  and 
  Gaimard, 
  and 
  afterwards 
  figured 
  by 
  them 
  as 
  

   Diphyes 
  bassensis 
  f, 
  is 
  a 
  very 
  abundant 
  form 
  and 
  appeared 
  at 
  

  

  * 
  ' 
  System 
  der 
  Acalephen,' 
  p. 
  126, 
  pi. 
  xii. 
  fig. 
  2. 
  

   + 
  'Voyage 
  de 
  UAstrolabe,' 
  Zoophytes, 
  pi. 
  iv. 
  tip. 
  IS. 
  

  

  