I just received an advertesement for the 1998 6th edition of Raven, Evert, and Eichhorn's Biology of Plants and the dinoflagellates are listed as Dinophyta! Previous editions used Pyrrhophyta. Scott Shumway Associate Professor of Biology Dept. of Biology Wheaton College Norton, MA 02766 508-286-3945 "Scott_Shumway at WheatonMa.edu" fax 508-285-8278