J. McGraw, Editors. 2006. Harvard University Press, Cambridge, Massachusett s. Vol. 1, Mechanisms and Measurements: ix + 589 pp., 32 color plates; ISBN 0-674-01893-1. Vol. 2, Function and Evolution: x + 477 pp., 32 color plates; ISBN 0-674-02176-2. Hardbound, $95.00 each.—In his now classic Animal Biochromes and Structural Colours (1953), Denis Fox surveyed the “physical, chemical, distribution...