brs 09/15/99 -- revised cladogram.
Copyright information for the living sea cucumber image is as follows:
A Sea Cucumber
(Pseudocolochirus axiologus) from the Smithsonian's National Zoological Park
in Washington, D.C. The
Zoo, with more than 3 million visitors annually, promotes
awareness of the need to save vanishing animal populations
Photo by Jessie Cohen. (c) 1991 Smithsonian Institution.