CONTENTS 



Page 



Introduction i 



Arctic explorations I 



Location, general surroundings, and facilities 3 



Personnel 4 



Equipment 5 



Physical and chemical features 5 



Climate and vegetation 5 



Geology 7 



Ice 10 



Currents 14 



Temperature (ocean) 17 



Salinity 20 



Light 21 



Oxygen 24 



Tides, winds, and storms 24 



General discussion 25 



Distribution 25 



Food 29 



Abundance of animals 31 



Storage of oil 35 



Reproduction phenomena 36 



Methods of collecting and preserving specimens 53 



Dredging, summer, 1948 and 1949 53 



Dredging, winter, 1949-50 53 



Bottom sampling, winter, 1949-50 56 



Dredging, summer, 1950 57 



Plankton sampling, summer 58 



Plankton sampling, winter 58 



Caring for animals in the laboratory 59 



Dredging stations and collecting data 60 



Zonation 60 



Dredging stations and representative animals 62 



Trapping through the ice 85 



Records of surf conditions and shore collecting 92 



Analysis of plankton sampling 104 



Parasites and commensals 113 



Discussion of animals by phyla 115 



Protozoa 115 



Porif era ii5 



Coelenterata 116 



Class Scyphozoa 120 



Class Anthozoa 121 



Ctenophora 123 



iii 



