﻿68 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  and 
  in 
  the 
  largest 
  nectophores 
  it 
  is 
  represented 
  merely 
  by 
  a 
  slight 
  

  

  thickening 
  of 
  the 
  ventral 
  canal. 
  

  

  In 
  the 
  general 
  structure 
  of 
  the 
  colony, 
  in 
  the 
  arrangement 
  of 
  the 
  

  

  nectophores, 
  and 
  in 
  size, 
  pentacantlia 
  very 
  closely 
  resembles 
  spinosa- 
  

  

  Oneof 
  thespeci. 
  

   ....'■■""" 
  mens 
  is 
  in 
  good 
  

  

  enough 
  condition 
  

   to 
  show 
  that 
  the 
  

   nectophores 
  are 
  

   borne 
  on 
  an 
  elon- 
  

   gate 
  ''Knospung- 
  

   zone" 
  (pi. 
  6, 
  fig. 
  0), 
  

   just 
  exactly 
  as 
  in 
  

   Hippo2)odius, 
  and 
  

   the 
  same 
  is 
  true 
  of 
  

   V. 
  spinosa 
  (fig. 
  1), 
  

   as 
  I 
  have 
  pre- 
  

   %aously 
  pointed 
  out 
  

   (1911&, 
  p. 
  211). 
  

   Chun 
  (1897a) 
  has 
  

   given 
  a 
  very 
  ^ood 
  

   figure 
  and 
  an 
  ac- 
  

   count 
  of 
  the 
  rela- 
  

   tion 
  of 
  nectophores 
  

   to 
  stem 
  in 
  Hippo- 
  

   podius, 
  and 
  as 
  the 
  

   two 
  genera 
  are 
  

  

  built 
  on 
  exactly 
  the 
  same 
  plan 
  in 
  this 
  respect, 
  no 
  further 
  account 
  is 
  

  

  needed 
  here. 
  Each 
  cormidium, 
  as 
  in 
  spinosa, 
  consists 
  of 
  siphon 
  with 
  

  

  its 
  tentacles, 
  and 
  gonophores, 
  both 
  female 
  and 
  male, 
  but 
  not 
  bract. 
  

  

  Palpons 
  are 
  absent, 
  as 
  indeed 
  in 
  all 
  Calycophores. 
  

  

  Family 
  DIPHYIDAE 
  Eschscholtz, 
  1829. 
  

  

  SulDfaixiily 
  j^BYLlN'^E 
  Ij. 
  Agassiz, 
  1863. 
  

   Genus 
  ABYLOPSIS 
  Chun, 
  1888. 
  

  

  ABYLOPSIS 
  TETRAGONA 
  (Otto) 
  Bigelow. 
  

   Pyramis 
  tetracjona 
  Otto, 
  1823, 
  p. 
  306, 
  pi. 
  42, 
  figs. 
  2a-2e. 
  

  

  (For 
  synonymy, 
  see 
  Bigelow, 
  19116, 
  p. 
  224). 
  

  

  Fig. 
  1.— 
  Vogtia 
  spinosa. 
  Most 
  of 
  the 
  appendages 
  and 
  necto- 
  

   phores 
  ARE 
  STRIPPED 
  OFF, 
  TO 
  SHOW 
  THE 
  RELATIONSHIP 
  OF 
  THE 
  

   STEM 
  8 
  TO 
  THE 
  ELONGATED 
  " 
  KNOSPUNGZONE 
  " 
  k 
  WHICH 
  BEARS 
  THE 
  

   NECTOPHORES. 
  «, 
  YOUNG 
  NECTOPHORE. 
  

  

  Station 
  4906, 
  369-0 
  fathoms; 
  1 
  entire 
  colony. 
  

   Station 
  4928, 
  300-0 
  fathoms; 
  8 
  entire 
  colonies. 
  

   Station 
  4930, 
  300-0 
  fathoms; 
  3 
  entire 
  colonies. 
  

  

  