Crinoids
Links
BioQUEST Crinoid Education Project
http://bcrc.bio.umass.edu/Crinoid/
Teaching paleoecology using Mississippian crinoids from Iowa.
Charles Messing's Crinoids
http://www.nova.edu/ocean/messing/crinoids/w1title.html
All about the comatulid crinoids.
Building A Crinoid
http://www.fallsoftheohio.org/education/build-crinoid.html
A model-making exercise for young students.