Plate P2. Magnification for light micrography is 2200x; magnification is indicated on electron micrography (SEM) specimens. Light micrography: PH = phase-contrast light, PL = plain transmitted light, XP = cross-polarized light. 6, 7. Fasciculithus tympaniformis, Sample 173-1068A-11R-3, 70-72 cm, PL (6) and XP (7).