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. 12, 13. Markalius inversus, Sample 173-1068A-14R-1, 6-8 cm, PH (12) and XP (13).