Introduction to the Ciliata
Life history, ecology, and systematics of ciliates, a group that includes some of the largest free-living protists.
www.ucmp.berkeley.edu/protista/ciliata.html
Micrographia: Ciliates
Offers an introduction to the microscopic unicellular organisms with photomicrographs of holotrich ciliates.
www.micrographia.com/specbiol/protis/cili/cili0100.htm