Allen Collins: 6/13/94 to 9/19/94

Ben M. Waggoner: 06/13/94 to 09/19/94; minor updates and revisions 7/12/95

Allen Collins: Rewrote introductory page 4/25/01

David Smith: Minor redesign of Cnidaria pages, some code cleanup, application of style sheet, footer addition 5/9/06