﻿MEDUSAE 
  AND 
  SIPHONOPHORAE 
  COLLECTED 
  BY 
  THE 
  

   U. 
  S. 
  FISHERIES 
  STEMIER 
  "ALBATROSS" 
  IN 
  THE 
  

   NORTHWESTERN 
  PACIFIC, 
  1906. 
  

  

  By 
  Henry 
  B. 
  Bigelow, 
  

  

  Of 
  the 
  Museum 
  of 
  Comparative 
  Zoology, 
  Cambridge, 
  Massachusetts. 
  

  

  INTRODUCTION. 
  

  

  The 
  medusae 
  and 
  siphonopliorae 
  described 
  in 
  the 
  following 
  pages 
  

   were 
  collected 
  by 
  the 
  U. 
  S. 
  Fisheries 
  steamer 
  Albatross 
  chiefly 
  in 
  the 
  

   northwestern 
  Pacific, 
  Bermg 
  Sea, 
  the 
  Sea 
  of 
  Okhotsk, 
  and 
  the 
  Sea 
  of 
  

   Japan 
  during 
  the 
  summer 
  of 
  1906. 
  The 
  itinerary 
  of 
  the 
  cruise 
  will 
  be 
  

   found 
  in 
  the 
  Report 
  of 
  the 
  Commissioner 
  of 
  Fisheries 
  for 
  1906, 
  but 
  

   for 
  the 
  convenience 
  of 
  the 
  reader 
  the 
  locahties 
  of 
  the 
  stations 
  at 
  

   which 
  medusae 
  were 
  taken 
  are 
  tabulated 
  below. 
  

  

  The 
  material 
  as 
  a 
  whole 
  is 
  in 
  excellent 
  condition, 
  and 
  I 
  am 
  indebted 
  

   to 
  Dr. 
  H. 
  B. 
  Torrey 
  for 
  the 
  use 
  of 
  his 
  field 
  notes. 
  

  

  The 
  collection 
  comprises 
  58 
  species 
  of 
  medusae 
  and 
  22 
  of 
  siphono- 
  

   phorae, 
  of 
  which 
  only 
  5 
  species 
  and 
  1 
  variety 
  of 
  medusae 
  are 
  new. 
  

   But 
  the 
  paucity 
  of 
  the 
  new 
  species 
  is 
  no 
  index 
  to 
  the 
  value 
  of 
  the 
  

   collection, 
  because 
  two 
  of 
  them 
  are 
  interesting 
  additions 
  to 
  the 
  

   mesoplankton, 
  while 
  additional 
  data 
  on 
  most 
  of 
  its 
  members 
  are 
  

   very 
  welcome, 
  and 
  the 
  opportunity 
  to 
  compare 
  them 
  with 
  their 
  

   nearest 
  allies 
  in 
  the 
  Atlantic 
  has 
  afforded 
  much 
  information 
  of 
  zoo- 
  

   geographic 
  interest. 
  

  

  There 
  are 
  no 
  new 
  siphonophores; 
  but 
  the 
  collection 
  contains 
  a 
  

   series 
  of 
  the 
  genus 
  Clausophyes 
  previously 
  known 
  only 
  from 
  a 
  frag- 
  

   ment 
  (Lens 
  and 
  Van 
  Riemsdijk) 
  and 
  from 
  one 
  record 
  which 
  has 
  

   long 
  been 
  regarded 
  as 
  problematical. 
  The 
  genus 
  proves 
  to 
  be 
  of 
  

   great 
  anatomic 
  interest. 
  

  

  The 
  collection 
  also 
  shows 
  that 
  the 
  species 
  earlier 
  described 
  by 
  me 
  

   (19116) 
  as 
  " 
  Muggiaea 
  Tcochii 
  Will" 
  is 
  the 
  Diphyes 
  truncata 
  of 
  Sars 
  — 
  

   a 
  discovery 
  of 
  geographic 
  interest. 
  

  

  Proceedings 
  U. 
  S. 
  National 
  Museum, 
  Vol, 
  44— 
  No. 
  1946. 
  

   69077°— 
  Proc.N.M.vol.44— 
  13 
  1 
  

  

  