﻿94 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  CYANEA, 
  variety? 
  

  

  Station 
  5008, 
  near 
  Sakhalin 
  Island, 
  surface; 
  1 
  fragmentary 
  speci- 
  

   men, 
  140 
  mm. 
  in 
  diameter. 
  

  

  This 
  specimen 
  has 
  lost 
  part 
  of 
  the 
  margin, 
  and 
  all 
  the 
  tentacles 
  and 
  

   mouth-arms, 
  but 
  what 
  remains 
  shows 
  that 
  it 
  was 
  almost 
  exactly 
  

   intermediate 
  between 
  var. 
  capillata 
  and 
  var. 
  nozakii. 
  The 
  sense 
  organs 
  

   agree 
  with 
  those 
  of 
  the 
  latter; 
  the 
  rhopalar 
  lappets 
  are 
  marked 
  

   off 
  by 
  very 
  shallow 
  notches, 
  that 
  is, 
  they 
  are 
  intermediate, 
  and 
  the 
  

   circular 
  musculature 
  is 
  especially 
  instructive, 
  as 
  the 
  9 
  or 
  10 
  outer 
  

   bands 
  are 
  separated 
  into 
  16 
  groups 
  by 
  broad 
  spaces, 
  while 
  the 
  4 
  

   or 
  5 
  inner 
  ones 
  are 
  unbroken, 
  and 
  it 
  is 
  interesting 
  that 
  it 
  is 
  inter- 
  

   mediate 
  in 
  geographic 
  occurrence, 
  as 
  well 
  as 
  anatomically. 
  

  

  Family 
  AURELIIDAE 
  L. 
  Agassiz, 
  1862. 
  

  

  Family 
  ULMARIDAE 
  i 
  Haeckel 
  (1879). 
  

  

  Genus 
  PARUMBROSA 
  Kishinouye, 
  1910. 
  

  

  Aureliidae 
  with 
  8 
  sense 
  organs; 
  with 
  24 
  tentacles; 
  with 
  blind 
  

   canals 
  extending 
  from 
  the 
  ring 
  canal 
  outward 
  into 
  the 
  marginal 
  

   lappets. 
  

  

  Parumbrosa 
  is 
  closely 
  allied 
  to 
  Discomedusa 
  and 
  Undosa; 
  but 
  it 
  

   differs 
  from 
  the 
  type 
  species 
  of 
  both 
  of 
  these 
  in 
  the 
  occurrence 
  of 
  

   blind 
  branches 
  from 
  the 
  ring 
  canal 
  into 
  the 
  marginal 
  lappets, 
  such 
  as 
  

   are 
  present 
  in 
  PTiacello'phora. 
  Mayer 
  (1910) 
  does 
  not 
  consider 
  tliis 
  

   character 
  of 
  generic 
  importance, 
  but 
  separates 
  Parumhrosa 
  from 
  

   Discomedusa 
  solely 
  on 
  the 
  ground 
  that 
  there 
  are 
  twice 
  as 
  many 
  mar- 
  

   ginal 
  lappets, 
  i. 
  e., 
  two 
  instead 
  of 
  one, 
  between 
  every 
  two 
  marginal 
  

   organs 
  (that 
  is, 
  tentacles 
  or 
  rhopalia). 
  In 
  the 
  present 
  case 
  it 
  seems 
  

   clear 
  that 
  the 
  number 
  of 
  lappets 
  has 
  less 
  phylogenetic 
  meaning 
  than 
  

   the 
  presence 
  of 
  canals, 
  because, 
  as 
  Mayer 
  himself 
  points 
  out, 
  the 
  two 
  

   lappets 
  between 
  every 
  two 
  tentacles 
  of 
  Parumhrosa 
  polylohafa 
  are 
  

   merely 
  the 
  result 
  of 
  the 
  fission 
  of 
  single 
  lappets. 
  

  

  The 
  features 
  separating 
  Parumbrosa 
  iiliili'p'pina 
  Mayer 
  from 
  P, 
  

   folylohata 
  are 
  that 
  m 
  the 
  former 
  there 
  is 
  only 
  one 
  lappet 
  between 
  

   every 
  two 
  canals, 
  and 
  that 
  the 
  branching 
  and 
  anastomosis 
  of 
  the 
  

   per- 
  and 
  interradial 
  canals 
  is 
  rather 
  more 
  complex 
  than 
  Kishinouye 
  

   (1910) 
  represents 
  it 
  for 
  the 
  latter. 
  

  

  PARUMBROSA 
  POLYLOBATA 
  Kishinouye. 
  

   Parumhrosa 
  polylobata 
  Kishinouye, 
  1910, 
  p. 
  19, 
  pi. 
  4, 
  fig. 
  20-23. 
  

   Station 
  4898, 
  207-0 
  fathoms; 
  1 
  specimen, 
  65 
  mm. 
  in 
  diameter. 
  

   Station 
  4899, 
  207-0 
  fathoms; 
  1 
  specimen, 
  110 
  mm. 
  m 
  diameter, 
  and 
  

   fragments 
  of 
  another. 
  

  

  Both 
  of 
  these 
  stations 
  are 
  off 
  the 
  Goto 
  Islands. 
  

   The 
  specimens 
  have 
  both 
  lost 
  most 
  of 
  their 
  mouth 
  parts 
  and 
  are 
  

   otherwise 
  damaged, 
  but 
  fortunately 
  they 
  still 
  show 
  the 
  canal 
  system, 
  

  

  » 
  Untenable, 
  because 
  Ulmaris 
  Haeckel 
  is 
  a 
  synonym 
  ol 
  Discomedusa 
  Claua- 
  

  

  