Plate P4. Magnification for light micrography is 2200x; magnification for scanning electron micrography (SEM) specimens is indicated. Light micrography: PH = phase-contrast light, PL = plain transmitted light, XP = cross-polarized light. 4-7. Fasciculithus schaubii, Sample 173-1068A-8R-6, 19-20 cm, PH (4), PL (5), and XP (6, 7).