﻿NO. 
  1946. 
  PACIFIC 
  MEDUSAE 
  AND 
  8IPH0N0PH0RAE—BIGEL0W. 
  

  

  57 
  

  

  that 
  they 
  probably 
  belong 
  to 
  the 
  form 
  which 
  I 
  described 
  from 
  the 
  

   eastern 
  Pacific 
  as 
  S. 
  incisa 
  Fewkes. 
  It 
  is 
  distinguished 
  from 
  the 
  better 
  

   known 
  marshalli 
  and 
  albescens 
  by 
  its 
  much 
  more 
  numerous 
  antimeres 
  

   and 
  less 
  numerous 
  otocysts, 
  as 
  well 
  as 
  by 
  its 
  rounded 
  gastric 
  pockets 
  

   and 
  very 
  large 
  size. 
  Probabl}' 
  8. 
  faheri 
  and 
  S. 
  Ueelcii 
  of 
  Haeckel 
  

   are 
  synonyms 
  of 
  incisa 
  (Bigelow, 
  1909a, 
  p. 
  64), 
  and 
  the 
  Solmaris 
  

   rhodoloma 
  of 
  Vanhoffen 
  (1908), 
  which 
  likewise 
  has 
  a 
  large 
  number 
  

   of 
  tentacles, 
  can 
  not 
  be 
  distinguished 
  from 
  incisa, 
  so 
  far 
  as 
  his 
  brief 
  

   account 
  of 
  rather 
  fragmentary 
  specimens 
  shows. 
  

  

  SOLMISSUS 
  INCISA 
  (Fewkes). 
  

  

  Solmaris 
  incisa 
  Fewkes, 
  1886, 
  p. 
  954, 
  pi. 
  9.— 
  Bigelow, 
  1909a, 
  p. 
  67, 
  pi. 
  21, 
  figs. 
  

  

  1-3, 
  5.— 
  Mayer, 
  1910, 
  p. 
  483 
  

   Solmissus 
  faheri 
  Haeckel, 
  1879, 
  p. 
  350. 
  

   Solmissus 
  bleekii 
  Haeckel, 
  1879, 
  p. 
  351. 
  

   ?,Sol7naris 
  rhodoloma 
  Vanhoffen, 
  1908. 
  p. 
  60, 
  pi. 
  1, 
  fig. 
  5 
  (not 
  Brandt, 
  1838). 
  

  

  The 
  series 
  gives 
  the 
  following 
  data; 
  

  

  Fragments 
  probably 
  belonging 
  to 
  this 
  species 
  were 
  taken 
  at 
  sta- 
  

   tions 
  4758, 
  4766, 
  4767, 
  4774, 
  and 
  4797, 
  m 
  the 
  trawl 
  or 
  in 
  "interme- 
  

   diate" 
  hauls. 
  

  

  The 
  specimens 
  are 
  all 
  in 
  poor 
  condition, 
  bemg 
  variously 
  torn 
  and 
  

   distorted, 
  with 
  the 
  entire 
  lower 
  wall 
  of 
  the 
  gastric 
  system 
  torn 
  awa^', 
  

   except 
  around 
  the 
  margins 
  of 
  the 
  gastric 
  pockets 
  and 
  in 
  the 
  septal 
  

   regions 
  separating 
  them. 
  Consequently 
  I 
  can 
  add 
  little 
  to 
  my 
  pre- 
  

   vious 
  account. 
  

  

  The 
  most 
  valuable 
  thing 
  about 
  the 
  series 
  is 
  the 
  data 
  which 
  it 
  

   affords 
  as 
  to 
  the 
  number 
  of 
  antimeres 
  and 
  tentacles. 
  In 
  the 
  eastern 
  

   Pacific 
  series 
  they 
  ranged 
  from 
  16 
  to 
  31 
  in 
  specimens 
  10-68 
  mm. 
  in 
  

   diameter, 
  all 
  the 
  large 
  ones 
  (17 
  mm. 
  or 
  upward) 
  having 
  upward 
  of 
  

   20. 
  And 
  Vanhoffen's 
  specimens 
  of 
  71, 
  75, 
  and 
  82 
  mm., 
  w^hich 
  prob- 
  

   ably 
  belong 
  here, 
  had 
  30, 
  28, 
  and 
  29, 
  respectivelj^ 
  

  

  These 
  numbers, 
  together 
  with 
  those 
  listed 
  above, 
  show 
  that 
  the 
  

   tentacles 
  increase 
  irregularly 
  with 
  growth 
  (a 
  specimen 
  of 
  45 
  mm. 
  has 
  

   19, 
  another 
  smaller 
  one, 
  of 
  43 
  mm., 
  has 
  24), 
  and 
  that 
  in 
  large 
  speci- 
  

   mens 
  there 
  are 
  always 
  many 
  more 
  tentacles 
  than 
  in 
  either 
  marshalli 
  

   or 
  albescens, 
  for 
  both 
  of 
  which 
  16 
  is 
  the 
  maximum 
  yet 
  recorded. 
  

  

  No 
  otocysts 
  were 
  found, 
  but 
  the 
  pads 
  on 
  which 
  these 
  organs 
  were 
  

   situated 
  are 
  preserved 
  in 
  a 
  few 
  antimeres 
  of 
  the 
  largest 
  specimens, 
  the 
  

  

  