INDEX OF SUBJECTS 



329 



Vascular system, 301 



evolution of, 302 



liquid in, 302 

 Vertical plankton nets, 121 



circulation in sea, 295 



movements of plankton, 148, 295 

 Viscosity of sea-water and movements 



of plankton, 148 



Water sample bottles, 7 

 and plankton collection, 



West Baltic trawl -fisheries, 



Whalebone whales, 203 

 food of, 203 



White Sea, 202 



Whiting, 107 



138 

 199 



Wild Birds Protection Act, 101 



Winter-fishes, 248 

 herring, 246 



Worms, 72 



Wyville-Thomson Ridge, 31 

 temperature of sea over, 38 

 salinity of sea over, 40 



Xanthellae, 226 



Yeasts in sea, 257 



Zoochlorellae, 226 

 Zoophytes, 73 

 Zoorema, 135 



