43 AMERICAN DIATOMS S C 967 A West Point, New York S C 968 B East River, New York; F. Frey S C 969 C Sag Harbor, New York S C 970 D Hudson River, New York S C 971 E Catskill, New York; stream in Stony Clove S P C 972 F Catskill Lake, New York; infusoria S C 973 G Catskill, New York; basin of Dog Hole Fall S C 974 H Catskill Lake, New York; infusoria S C 975 I Hyde Park, New York; stream; Sept. 1854; no. 2 S C 976 J Hyde Park, New York; stream; Sept. 1854; no. 3 S C 977 K Jamaica Bay, Long Island, New York; infusoria S C 978 L Niagara, New York; remarkable circular disc from mud adhering to Chara near Biddle's stairs; this specimen has been treated with acid S P C 979 M West Point, New York S P C 980 N West Point, New York S P C 981 O West Point, New York S C 982 P Amboy, New Jersey S C 983 Q Hoboken, New Jersey S C 984 R Hoboken, New Jersey; Mr. Edwards S C 985 S Hoboken, New Jersey; Mr. Edwards S C 986 T Milford, Connecticut S C 987 U New Haven, Connecticut S C 988 V Smithfield, Rhode Island S P C 989 W Smithfield, Rhode Island S P C 990 X Smithfield, Rhode Island S C 991 Y Boston, Massachusetts; filtered from Cochituate water; Prof. Hersford