A. General Section. 1. Morphology, Biology, and Terminology. 2. Phylogeny 3 Previous Classifications and Revisions. 4. Parasitism. 5. Ecology, Occurrence, and Geographic Distribution. 6. Collecting, Culturing, Observing, and Staining of Urostyloid Ciliates. 7. Species Concept and Nomenclature -- B. Systematic Section. Urostyloidae. Taxa of Unknown Position within the Urostyloidea. Supplement to the Oxytrichidae. Taxa not Considered -- Addenda. References. Systematic Index -- Table Index.