﻿226 
  Prof. 
  Carl 
  Chun 
  on 
  the 
  

  

  dantly 
  than 
  M. 
  brevitruncata, 
  together 
  with 
  the 
  Diplophysre 
  

   belonging 
  to 
  them 
  (D. 
  inermis 
  and 
  truncata) 
  from 
  September 
  

   to 
  April. 
  

  

  Subfara. 
  2. 
  Cymboxectid.%, 
  Hackel. 
  

  

  DORAMASIA, 
  g. 
  n. 
  

  

  Nectocalyx 
  Diphyidiform, 
  slender, 
  with 
  a 
  long, 
  tubularly 
  

   drawn-out 
  apex 
  to 
  the 
  subumbrella. 
  Eudoxiaj 
  with 
  sterile 
  

   special 
  nectocalyces 
  (Erscea 
  Bojani^ 
  Esch.). 
  

  

  4. 
  Doramasia 
  picta 
  } 
  sp. 
  n. 
  

  

  Sheath 
  (hydrcecium) 
  elongated, 
  funnel-shaped. 
  Oil-recep- 
  

   tacle 
  long, 
  reaching 
  to 
  the 
  tubular 
  constriction 
  of 
  the 
  subum- 
  

   brella. 
  Stem 
  short, 
  with 
  only 
  two 
  groups 
  of 
  appendages. 
  

   The 
  Eudoxice 
  become 
  developed 
  into 
  Ersaja 
  Bojani, 
  Eschsch. 
  

   (Eudoxia 
  Bojani, 
  Huxl.). 
  

  

  Doramasia 
  represents 
  a 
  remarkably 
  elegant 
  Monophyid 
  

   which 
  immediately 
  strikes 
  one 
  by 
  its 
  splendid 
  colouring. 
  

   The 
  ventral 
  surface 
  of 
  the 
  subumbrella 
  with 
  its 
  tubular 
  portion 
  

   is 
  of 
  an 
  intense 
  orange 
  or 
  bright 
  yellow 
  colour. 
  Large 
  orange 
  

   spots 
  also 
  appear 
  on 
  the 
  dorsal 
  and 
  ventral 
  margins 
  of 
  the 
  

   umbrella, 
  and, 
  further, 
  the 
  siphosoma 
  (polypite) 
  of 
  the 
  oldest 
  

   group 
  is 
  also 
  very 
  frequently 
  intensely 
  tinged 
  with 
  orange. 
  

   The 
  lowest 
  ventral 
  cell 
  of 
  the 
  fluid-receptacle 
  is 
  constantly 
  eme- 
  

   rald-green 
  (changing 
  by 
  transmitted 
  light 
  to 
  the 
  complementary 
  

   rose-colour). 
  Frequently 
  at 
  the 
  opening 
  of 
  the 
  dorsal 
  um- 
  

   brellar 
  vessel 
  into 
  the 
  annular 
  canal 
  there 
  is 
  a 
  vascular 
  plate 
  

   formed 
  by 
  numerous 
  ramifications 
  and 
  anastomoses, 
  which 
  

   also 
  has 
  a 
  greenish 
  lustre. 
  

  

  The 
  strict 
  proof 
  that 
  a 
  Siphonophore 
  furnished 
  only 
  with 
  

   a 
  single 
  nectocalyx 
  really 
  belongs 
  to 
  the 
  Monophyidse 
  can 
  be 
  

   obtained, 
  according 
  to 
  my 
  previous 
  statements, 
  only 
  by 
  that 
  

   of 
  the 
  absence 
  of 
  the 
  rudiment 
  of 
  a 
  second 
  calyx 
  at 
  the 
  base 
  

   of 
  the 
  stem. 
  I 
  have 
  examined 
  nearly 
  forty 
  specimens 
  of 
  

   Doramasia 
  upon 
  this 
  point 
  at 
  the 
  most 
  different 
  times, 
  and 
  

   have 
  often 
  preserved 
  and 
  carefully 
  observed 
  the 
  same 
  indivi- 
  

   dual 
  for 
  several 
  days 
  without 
  being 
  able 
  to 
  detect 
  a 
  trace 
  of 
  a 
  

   second 
  calyx. 
  

  

  Hackel, 
  in 
  his 
  tabular 
  revision, 
  regards 
  Ersosa 
  Bojani 
  as 
  

   the 
  offspring 
  of 
  Diphyes 
  dispar, 
  Cham. 
  ; 
  but 
  this 
  can 
  only 
  be 
  

   upon 
  suppositions 
  which 
  are 
  not 
  confirmed. 
  I 
  have 
  traced 
  

   Ersrea 
  Bojani 
  with 
  its 
  characteristic 
  widened 
  oil-receptacle 
  in 
  

   the 
  scutiform 
  hydrophyllium, 
  in 
  all 
  stages 
  of 
  development, 
  

  

  