PLANKTON : LARVAE 



1. Crab zoea ; 2. Fish egg; 3. Sea Urchin pluteus ; 4. Barnacle 



nauplius ; 5. Fish larva ; 6. Mussel larva ; 7. Copepod nauplius ; 



8. Worm larva. 



4- 5 \* 



PLANKTON : UNICELLULAR ORGANISMS 



1, 2, 3, 7, 10, 11, 12, 13, 16, 17, 18. Diatoms ; 4, 5, 7, 9, Peridinians 

 8. An Algal spore ; 14. Noctiluca ; 15. A Radiolarian. 



FIG, 6 



