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Figure 10.— Number of Rangia set and salinity at station Ag from July 1970 to January 1972. 



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Figure 11. -Number of Rangia set and salinity at station Bg from July 1970 to January 1972. 



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 Figure 12.-Number of Rangia set at station D in relation to salinity for September 1970 to January 1972. 



422 



