Diane Stoecker notes:


 Samples obtained from 30 liter Go-Flo bottles, 26 liters of water filtered
 through a modified Buchner funnel with 20 um nitex mesh screen.
 Samples were preserved with 20% buffered formalin.  Strontium chloride was
 added to aid with acantharian preservation.  Samples stored in dark and
 refrigerated.