Ventral view of the small scutociliate, Cyclidium glaucoma (Mueller, 1773). The infraciliature has been stained by the Klein-Foissner silver nitrate technique (see Foissner, W. Europ. J. Protistol.27,313-330;1991). The argyrome or silverline system is revealed. The denser longitudinal argentophilic lines are crossed by finer transverse bridging lines (seen best in the anterior 1/2 here). The reverse "J" shaped paraoral membrane is clearly seen. the line just medial to the paraoral membrane represents the three adoral membranelles. A short dense longitudinal line immediately posterior to the paraoral membrane represents the cytoproct (cell anus). Collected from stagnant freshwater rich in decomposing matter near Boise, Idaho, August 2004. Brightfield.