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Reprint of the original, first published in 1871.
Four Centuries of Geological Travel: The Search for Knowledge on Foot, Bicycle, Sledge and Camel focuses on the complexities of geological exploration and will be of particular interest to earth scientists, historians of science and to the general reader interested in science.
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.