As the preparation of an annotated check list of the marine Mollusca of Surinam (Dutch Guiana) will take some more years, it was thought appropriate to publish a preliminary report on the bivalves. This report consists of a list of 126 species with a few notes containing, i.a., the description of seven new species, and a discussion of the local distribution of the marine bivalves. Of the 126 species listed seven are described as new, viz., Nucula surinamensis, Crenella abbotti, Periploma coquettae, Tivela geijskesi, Diplodonta (Sphaerella) rehderi, Lucina (Parvilucina) clenchi, and Mactra (Micromactra) surinamensis.