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''THE SYSTEMATIC ACCOUNT OF THE AMERICAN SEASHELLS includes the scientific and common names, geographical ranges, descriptions, comparative remarks and habitats of 1500 of the 6000 species of marine mollusks found in North American waters. The areas covered are from Alaska to southern California and from Labrador to the Gulf of Mexico. Consequently a large part of the molluscan fauna of Bermuda, the West Indies, Lower California and the Gulf of California is included. Monographic accounts and more detailed information on the remaining species and their ecology, anatomy and habits may be found by consulting the papers listed by subject matter in the appendix on molluscan literature.''