Plate P3. Magnification for light micrography is 2200x. Light micrography: PH = phase-contrast light, PL = plain transmitted light, XP = cross-polarized light, SEM = scanning electron micrography. 6, 7. Retecapsa crenulata, Sample 173-1068A-15R-2, 92-93 cm, PH (6) and XP (7).