﻿52 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  pigmentation 
  covered 
  the 
  entire 
  subumbrella, 
  though 
  now 
  it 
  is 
  

   intact 
  over 
  occasional 
  patches 
  only. 
  

  

  Family 
  HALICREASIDAE 
  Fewkes, 
  1886. 
  

   Family 
  HALICREIDAE 
  Vanhoffen, 
  19026. 
  

  

  HALICREAS 
  PAPILLOSUM 
  Vanhoffen. 
  

  

  ? 
  Halkreas 
  minimum 
  Fewkes, 
  18826, 
  p. 
  306; 
  1886, 
  p. 
  953, 
  pi. 
  8. 
  

  

  Halicreas 
  papillosum 
  Vanhoffen, 
  19026, 
  p. 
  C8, 
  pi. 
  9, 
  figs. 
  7, 
  8; 
  pi. 
  11, 
  fig. 
  30. 
  — 
  

   ]\Iaas, 
  1905, 
  p. 
  57, 
  pi. 
  10, 
  fig. 
  70; 
  pi. 
  11, 
  fig. 
  71.— 
  Bigelow, 
  1909a, 
  p. 
  138, 
  

   pi. 
  3, 
  fig. 
  3; 
  pi. 
  34, 
  figs. 
  1-3, 
  5, 
  8, 
  10, 
  11.— 
  Mayer, 
  1910, 
  p. 
  391. 
  

  

  Halicreas 
  papillosum, 
  var. 
  antarcticum 
  Browne, 
  1908, 
  p. 
  237. 
  

  

  Station 
  4774, 
  depth 
  ?; 
  1 
  specimen, 
  25 
  mm. 
  in 
  diameter; 
  frag- 
  

   mentary. 
  

  

  Station 
  4780, 
  1046-0 
  fathoms; 
  3 
  specimens, 
  28-30 
  mm. 
  in 
  diam- 
  

   eter; 
  fragmentary. 
  

  

  Station 
  4797, 
  682-0 
  fathoms; 
  1 
  specimen, 
  30 
  mm. 
  in 
  diameter; 
  

   fragmentary. 
  

  

  Station 
  4800, 
  300-0 
  fathoms; 
  1 
  specimen, 
  15 
  mm. 
  in 
  diameter; 
  

   fragmentary. 
  

  

  Station 
  5064, 
  300-0 
  fathoms; 
  2 
  specimens, 
  35 
  mm. 
  in 
  diameter; 
  

   fragmentary. 
  

  

  Although 
  the 
  specimens 
  are 
  all 
  more 
  or 
  less 
  fragmentary, 
  they 
  

   are 
  interesting 
  as 
  corroborating 
  my 
  earlier 
  account 
  of 
  the 
  tentacles, 
  

   several 
  of 
  which 
  clearly 
  show 
  the 
  soft 
  proximal 
  and 
  stiff 
  spine-like 
  

   distal 
  portion 
  (1909a), 
  and 
  especially 
  since 
  they 
  show 
  that 
  the 
  

   characters 
  on 
  which 
  Browne 
  (1908) 
  based 
  his 
  var. 
  antarcticum 
  — 
  

   that 
  is, 
  presence 
  of 
  tubercles 
  on 
  the 
  central 
  projection 
  of 
  the 
  exum- 
  

   brella 
  — 
  is 
  merely 
  an 
  individual 
  variation, 
  for 
  the 
  projection 
  is 
  smooth 
  

   in 
  two 
  specimens, 
  tuberculous 
  in 
  a 
  third. 
  

  

  Genus 
  BOTRYNEMA 
  Browne, 
  1908. 
  

  

  Alloionema 
  Hartlaub, 
  1909. 
  

  

  This 
  genus, 
  in 
  which 
  the 
  tentacles 
  are 
  in 
  groups, 
  is 
  so 
  far 
  known 
  

   from 
  a 
  single 
  specimen 
  from 
  the 
  Antarctic, 
  the 
  type 
  of 
  B. 
  hrucei 
  

   Browne 
  (1908); 
  and 
  from 
  5 
  described 
  almost 
  simultaneoush^ 
  by 
  Hart- 
  

   laub 
  (19096) 
  from 
  the 
  Arctic 
  Ocean 
  as 
  Alloionema 
  eUinorae. 
  

  

  Four 
  specimens 
  in 
  the 
  Albatross 
  collection 
  likewise 
  belong 
  to 
  

   Botrynema, 
  and 
  are 
  indistinguishable 
  from 
  eUinorae. 
  The 
  latter 
  

   and 
  hrucei 
  are 
  closely 
  allied 
  to 
  each 
  other, 
  the 
  only 
  apparent 
  differ- 
  

   ences 
  being 
  that 
  in 
  hrucei 
  the 
  margin 
  is 
  cleft 
  into 
  lobes 
  and 
  that 
  the 
  

   perradial 
  tentacles 
  lie 
  in 
  exumbral 
  grooves. 
  But 
  until 
  more 
  speci- 
  

   mens 
  of 
  the 
  Antarctic 
  hrucei 
  are 
  studied, 
  it 
  is 
  impossible 
  to 
  tell 
  

   whether 
  these 
  slight 
  differences 
  are 
  significant, 
  or 
  whether 
  they 
  are 
  

  

  