area where good mixing with open sea water occurs. Aver-

age temperatures were lowest and very constant at Stations

1 and 2. The depth at these stations, 6.9 and 10.7 meters,

respectively, is, however, considerably greater than that

at other sample sites. The shallower more protected parts

of the area tend to be more sensitive to variations in air

temperature than are the deeper better flushed locations.

Thus, during cooler periods and at night, water temperatures

in the shallows fall below those at the deeper, exposed

stations; while during warmer weather or in the daytime,

water temperature in the shallows are higher than those at

deeper stations.

Salinity

 Salinity varied widely, both spatially and temporally

 (Table 1). Generally the shallow, more protected reaches

 of Banner Bay and the Lagoon maintain a higher salinity than

 do the more mobile waters to the south. However, during

 Hay and June, 1970 unusually heavy rains caused considerable

 flooding throughout the island. In May the study area and

 its watershed received sone eight inches of rain, almost

 half of it between May 9 and 10. Seven inches of rain fell

 in June, about four inches from June 14 to 16.

 In Benner Bay and especially the Lagoon, salinities

were depressed considerably; most notably at Station 10


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