Figure 5. — Contour lines showing relative density (geonnet- 

 ric mean of number per ml.) of Gymnodinium breve in 

 North-South areas 0-3, September-November, 1954-60. 



Figure 7. — Contour lines showing relative density {geomet- 

 ric mean of number per ml.) of Gymnodinium breve in 

 North-South areas 0-3, December- February, 1954-60. 



Figure 6. — Contour lines showing relative density (geomet- 

 ric mean of number per ml.) of Gymnodinium breve in 

 North-South areas 4-7, September-November, 1954-60. 



Figure 8. — Contour lines showing relative density (geomet- 

 ric mean of number per ml.) of Gymnodinium breve in 

 North-South areas 4-7, December- February, 1954-60. 



11 



