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. 11-13. Heliolithus kleinpellii, Sample 173-1068A-10R-3, 123-125 cm, PH (11), PL (12), and XP (13).