93 NORTHEASTERN AND NORTHCENTRAL UNITED STATES SERIES S C 1958 17a Traverse Bay, Michigan S C 1959 17b Traverse Bay, Michigan S C 1960 17c Traverse Bay, Michigan S C 1961 17d Oakland County, Michigan; Recent infusoria S C 1962 17e Oakland County, Michigan; Lake Elizabeth S C 1963 17f Oakland County, Michigan; no. 4 S C 1964 17g Oakland County, Michigan; no. 3 S C 1965 17h Oakland County, Michigan; Recent infusoria; F.F. S C 1966 17i Oakland County, Michigan; Recent infusoria S C 1967 17j Mackinaw, Michigan S C 1968 17k Oakland County, Michigan; no. 5 C 1969 18a Morris County, New Jersey S C 1970 18b Mapleton, New Jersey; Dr. Torrey; J.S.S. S C 1971 18c Burlington, New Jersey; from mud of Delaware River S C 1972 19a Cleveland, Ohio S C 1973 19b Cleveland, Ohio; pier S* C 1974 20a Rockaway, New York S C 1975 20b Rockaway, New York S C 1976 20c Rockaway, New York S C 1977 20d Rockaway, New York S C 1978 20e Rockaway, New York S C 1979 20f Rockaway, New York S C 1980 20g Rockaway, New York S C 1981 20h Rockaway, New York S C 1982 21a Hudson River, New York S C 1983 21b Hudson River, New York