- 57 - 



Submarine Daylight: 



Phytoplanktou: depth (m) of chlorophyll a (mg/m ), 1, 0.21; 5, 0. 22; 15, 0. 19; 25, 0. 18; 50, 0.65; 100, 0.21. 



Water column chlorophyll a: 39 mg/m . 



Phytoplankton haul taken. 



Zooplankton: N-C N, o to 309 m, 1754-1827 GCT, 130 ml T, 130 ml S; H at m, 1803-1832 GCT, 19 ml T, 19 ml S. 



STATION 73 

 (regular night) 



May 26, 1958; 0600-0830 GCT; 10°35.5'N, 87°29'W; 1980 fm; wind, direction missing, force 1; temp. , 83.9°F dry, 

 79.0°F wet; weather, 02; clouds, type missing, amt. , 4; sea, 1; swell, 200°, missing; time zone 6. 



Biological Data 



Zooplankton: N-C N, o to 288 m, 0720-0753 GCT, 191 ml T, 182 ml S; H at m, 0726-0756 GCT, 475 ml T, 



475 ml S. 



Nekton: o to 80 m, 0609-0713 GCT, 389 ml T. (Incomplete, net torn.) 

 Ni^t- lighting operations. 



