94 S C 1984 21c Hudson River, New York S C 1985 21d Hudson River, New York S C 1986 21e Hudson River, New York; from mud S C 1987 21f Hudson River, New York S C 1988 21g Hudson River, New York S C 1989 21h Hudson River, New York S C 1990 21i Hudson River, New York S C 1991 21j Hudson River, New York S C 1992 21k New York, New York; mud of docks S C 1993 21l Hudson River, Hyde Park, New York; mud S C 1994 21m Hudson River, New York S C 1995 21n Hudson River, New York S C 1996 22a Greenport, New York S C 1997 22b Greenport, New York S C 1998 22c Greenport, New York S C 1999 22d Greenport, New York S C 2000 22e Greenport, New York S C 2001 22f Greenport, New York S C 2002 22g Greenport, Long Island, New York; salt marsh S C 2003 22h Greenport, Long Island, New York S C 2004 22i Greenport, Long Island, New York S C 2005 22j Greenport, Long Island, New York S C 2006 23a West Point, New York S C 2007 23b Catskill Pond, New York S C 2008 23c Round Pond near West Point, New York; Recent infusoria S C 2009 23d Mill Pond, West Point, New York S C 2010 23e Mill Pond, West Point, New York S C 2011 23f Mill Pond, West Point, New York