CONTENTS 



List of plates 

 List of text fgiircs 

 Author' s Prejcice 



1. Introduction 



2. Methods 



3. The plants — the phytoplankton 



4. The animals — the zooplankton I 



5. Continued — the zooplankton II 



6. The planktonic larvae 



7. The fish and young fish 



8. Geographic and seasonal distribution 



9. The food chain in the sea 



10. Plankton and its relationship with the fisheries 



11. 'Indicator' species and water movements 



12. Behaviour 



13. Plankton as food for man, and the possibilities of 

 fertilizing the sea 



Index 



page 

 iv 



V 



I 



5 



9 



28 



43 



65 



83 



97 



107 



121 



126 



139 



153 



162 



172 



45. Peridiniiim depressinn, (a) side view, 

 (b) from the top 



; — the phytoplatikton. 



Coscinodiscus radiatus, {a) valve view, 



(b) girdle view 



Thalassiosira gravida 



Lauderia borealis 



Stephaiwpyxis tnrris 



Giiiiiardia flaccida 



Bacteriastrnm dclicattiUim 



Rliizosoknia facroeiise 



Rhizosolcnia setigera 



Rhizosoktiia styliformis 



Chaetoceros borealis 



Chaetoceros decipiens 



Biddiilphia regia 



DityUuni briglitwelli 



Fragillaria islandica 



Thahissiorhri.x longissinia 



Lycniophora lyngbyei 



Bacillaria paradoxa 



Nitzschia seriata 



Amphidininm britannicum 

 Ceratiiim jiirca 

 Ceratiiim macroceros 

 Dinophysis acuta 



Colour drawing by T. Lovegrove 



