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. 5, 10. Biscutum constans, Sample 173-1069A-12R-3, 27-29 cm, XP (5) and PH (10).