502 A Arnold, Mrs Augusta (Foote) 1844-1903. The sea- each at ebb-tide; a guide to the study of the seaweeds and the lower animal lifefound botween tidemarks. By Augusta Foote Arnold, with moroe than 600 illustrations. New York, Tho Contury co., 1901. xii, 490 p. illus. 21 cm