﻿NO. 
  1946. 
  PACIFIC 
  MEDUSAE 
  AND 
  SIPHONOPRORAE—BIGELOW. 
  119 
  

  

  Diphyes 
  truncata. 
  

  

  Fig. 
  3. 
  Inferior 
  nectophore; 
  the 
  course 
  of 
  the 
  lateral 
  subumbral 
  canals 
  is 
  partly 
  

   reconstructed 
  (dotted). 
  X7. 
  

  

  4. 
  Ventral 
  view 
  of 
  base 
  of 
  same 
  to 
  show 
  basal 
  wings 
  and 
  open 
  hydroecial 
  groove 
  

  

  bounded 
  by 
  two 
  ridges. 
  

  

  5. 
  Ventral 
  view 
  of 
  base 
  of 
  superior 
  nectophore. 
  (See 
  text 
  fig. 
  2, 
  p. 
  74.) 
  

  

  Vogtia 
  pentacantha. 
  

  

  Fig. 
  6. 
  Part 
  of 
  a 
  colony 
  with 
  the 
  nectophores 
  torn 
  off 
  to 
  show 
  the 
  relationship 
  between 
  

   the 
  muscular 
  stalk 
  or 
  " 
  Knospungzone, 
  " 
  which 
  bears 
  the 
  latter 
  to 
  the 
  stem. 
  

   At 
  its 
  tip 
  are 
  four 
  young 
  nectophores. 
  Only 
  the 
  basal 
  part 
  of 
  the 
  stem, 
  

   with 
  a 
  few 
  siphons 
  and 
  gonophores, 
  is 
  shown. 
  

  

  Archangelopsis 
  typica. 
  

   Fig. 
  7. 
  Side 
  view. 
  X4. 
  From 
  a 
  photograph. 
  

  

  