NATURE ADRIFT 



Underwater television, 26 



upwclling, 112, 113 



utilization of nutrients, 110-112, 167 



Valdivia, 6 



valves, of diatoms, 31-32 

 Velclla, 57, pi. XVI 

 veligers, 87, pi. XXI 

 vertebral number, loi 

 vertical hauls, 18 

 vertical migration, 155 

 vitamins, 119, 122, 139, 162-163 

 dangers of excess, 162-163 



Whales, 133, pi. XXXV 

 whelks, 87 



'white water', 42, 133 

 whiting (with Cyanea), 51 



Wilson, Dr. D. P., 3 



winkles, 87 



wind, 108, 112 



world's food supply, 163, 170-171 



'worms', 59, 85, 124 



Wyville Thomson Ridge, 108 



Xanothophyceae, 39 



Yield offish, 136 

 yield of phytoplankton, 136 

 yield of plankton for food, 165 

 yolk sac, 98 



Zoea, 88, pis. XVIII, XXIV, XXV, fi^ 



21 

 ZoothaiiiiiioH, pl. X 



178 



