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. 20-22. Ahmuellerella octoradiata, Sample 173-1068A-14R-7, 35-36 cm, PH (20) and XP (21, 22).