Listed are periodicals in the biological sciences, selected according to the following criteria: they are current publications, issued at least twice a year, covered by at least three of four major indexing and abstracting services, acquisitioned currently by at least one of the three national libraries, comprise part of the collections of other major domestic libraries, and are devoted entirely or mainly to the publication of original research. Periodicals are arranged alphabetically by title, with the place and frequency of publication indicated. The list is introduced by a description of the procedures used to collate the list, and a list of information sources is included. (EB)