﻿1946. 
  PACIFIC 
  MEDUSAE 
  AND 
  SIPHONOPHORAE—BIOELOW. 
  

  

  23 
  

  

  of 
  canals 
  and 
  tentacles, 
  the 
  new 
  species, 
  nematophora, 
  falls 
  witli 
  horch- 
  

   grevinki 
  and 
  higelovn. 
  The 
  Bering 
  Sea 
  specimen 
  which 
  I 
  referred 
  

   (1909) 
  to 
  simulans 
  probably 
  belonged 
  to 
  nematophora 
  because 
  of 
  the 
  

   numerous 
  tentacles. 
  Its 
  geographic 
  origin 
  likewise 
  points 
  in 
  that 
  

   direction, 
  but 
  unfortunately 
  the 
  lip 
  is 
  badly 
  damaged. 
  

  

  CALYCOPSIS 
  NEMATOPHORA, 
  new 
  species. 
  

   Plate 
  2, 
  fig. 
  8; 
  plate 
  3, 
  figs. 
  1-3. 
  

   The 
  series 
  gives 
  the 
  following 
  data: 
  

  

  Type.— 
  Cat. 
  No. 
  31054, 
  U.S.N.M. 
  

  

  At 
  stations 
  4773, 
  338 
  fathoms 
  to 
  surface, 
  and 
  4804, 
  229 
  fathoms 
  

   to 
  surface, 
  one 
  specimen 
  each 
  was 
  taken, 
  but 
  they 
  were 
  too 
  battered 
  for 
  

   counting 
  the 
  tentacles. 
  Also 
  Bering 
  Sea, 
  July, 
  1890 
  (station 
  3307), 
  

   surface, 
  21 
  specimens 
  in 
  alcohol, 
  much 
  contracted, 
  now 
  about 
  15 
  mm. 
  

   high; 
  Bering 
  Sea, 
  August, 
  1895 
  (station 
  Hyd. 
  3629), 
  surface, 
  4 
  speci- 
  

   mens 
  in 
  alcohol, 
  much 
  contracted. 
  

  

  The 
  specimens 
  are 
  of 
  the 
  usual 
  "Calycopsis" 
  outline, 
  rather 
  higher 
  

   than 
  broad 
  except 
  when 
  contracted, 
  and 
  most 
  of 
  them 
  laterally 
  

   flattened. 
  But 
  inasmuch 
  as 
  the 
  flattening 
  may 
  be 
  either 
  radial 
  or 
  

   interradial, 
  and 
  as 
  one 
  example 
  is 
  not 
  flattened 
  at 
  all, 
  this 
  character 
  

   is 
  probably 
  the 
  result 
  of 
  temporary 
  contraction 
  or 
  of 
  preservation, 
  

   as 
  it 
  is 
  in 
  C. 
  typa 
  (Bigelow, 
  19096). 
  

  

  It 
  is 
  mteresting 
  that 
  several 
  of 
  the 
  specimens 
  have 
  a 
  sKght 
  funnel- 
  

   shaped 
  apical 
  depression. 
  These 
  being 
  the 
  best 
  preserved 
  examples, 
  

   and 
  those 
  in 
  which 
  it 
  is 
  lacking 
  being 
  somewhat 
  damaged 
  in 
  that 
  

   region, 
  it 
  is 
  probable 
  that 
  the 
  depression 
  is 
  a 
  normal 
  feature. 
  But 
  it 
  

   is 
  neither 
  as 
  deep 
  nor 
  as 
  narrow' 
  as 
  it 
  is 
  in 
  typa 
  (Bigelow, 
  1909&, 
  pi. 
  

   30, 
  fig. 
  1).^ 
  

  

  Manubrium. 
  — 
  The 
  manubrium 
  is 
  barrel-shaped; 
  separable 
  into 
  well- 
  

   defined 
  basal, 
  gastric, 
  and 
  labial 
  portions. 
  When 
  expanded 
  it 
  is 
  about 
  

   as 
  long 
  as 
  the 
  bell 
  cavity 
  is 
  deep; 
  but 
  in 
  several 
  examples 
  it 
  is 
  very 
  

   much 
  contracted. 
  

  

  Gonads. 
  — 
  In 
  C. 
  typa, 
  C. 
  simulans, 
  and 
  C. 
  ligelowi 
  the 
  gonads 
  consist 
  

   of 
  double 
  series 
  of 
  very 
  regular 
  folds; 
  and 
  in 
  C. 
  chuni 
  they 
  are 
  of 
  the 
  

   same 
  general 
  type 
  though 
  less 
  regular 
  (Vanhoffen, 
  1911). 
  In 
  nema- 
  

   tophora 
  they 
  are 
  rather 
  different, 
  for 
  the 
  two 
  series 
  of 
  folds 
  are 
  less 
  

  

  