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The Fourth Edition of The Light and Smith Manual continues a sixty-five-year tradition of providing to both students and professionals an indispensable, comprehensive, and authoritative guide to Pacific coast marine invertebrates of coastal waters, rocky shores, sandy beaches, tidal mud flats, salt marshes, and floats and docks. This classic and unparalleled reference has been newly expanded to include all common and many rare species from Point Conception, California, to the Columbia River, one of the most studied areas in the world for marine invertebrates. In addition, although focused on the central and northern California and Oregon coasts, this encyclopedic source is useful for anyone working in North American coastal ecosystems, from Alaska to Mexico. More than one hundred scholars have provided new keys, illustrations, and annotated species lists for over 3,500 species of intertidal and many shallow water marine organisms ranging from protozoans to sea squirts. This expanded volume covers sponges, sea anemones, hydroids, jellyfish, flatworms, polychaetes, amphipods, crabs, insects, snails, clams, chitons, and scores of other important groups. The Fourth Edition also features introductory chapters on marine habitats and biogeography, interstitial marine life, and intertidal parasites, as well as expanded treatments of common planktonic organisms likely to be encountered in near-to-shore shallow waters.
Invertebrate assemblages analogous to the Aleutain molluscan province indicate a former cool-temperate marine climate.
Chitons form a peculiar and highly interesting class of molluscs, known with certainty to exist since the Ordovician, and widespread in all world seas to depths from 0 to over 7,000 m. In recent years taxonomists all over the world have much contributed to our knowledge of the chitons and their synonymy, so that the number of living species now amounts to some 800. The authors propose to not only compile all actual knowledge about the living chitons, but, where possible, a after a careful study of the type material, to systematically describe and illustrate every known -- or hitherto unknown -- species. In most cases the detailed figures are new and drawn by the senior author, P. Kaas. The Monograph of Living Chitons is planned to appear in ten volumes.