Crinoid Creatures - Spectacular photographs and a brief article about modern crinoids. home.mem.net/~zipper/crinoids.htm
Crinoidea - Extensive article about modern and ancient crinoids by William I. Ausich and Charles G. Messing for the Tree of Life project. tolweb.org/tree?group=Crinoidea&contgroup=Echinodermata
