Plate P4. Magnification for light micrography is 2200x; magnification for scanning electron micrography (SEM) specimens is indicated. Light micrography: PH = phase-contrast light, PL = plain transmitted light, XP = cross-polarized light. 1. Broinsonia parca constricta, Sample 173-1069A-15R-2, 71-75 cm, SEM. 2. Unknown placolith used to illustrate preservation as seen in Sample 173-1069A-15R-2, 71-75 cm, SEM. 3. Prediscosphaera spp., Sample 173-1069A-15R-2, 71-75 cm, SEM. 4-7. Fasciculithus schaubii, Sample 173-1068A-8R-6, 19-20 cm, PH (4), PL (5), and XP (6, 7). 8-10. Eiffellithus turriseiffelii, Sample 173-1068A-14R, 121-122 cm, PH (8) and XP (9, 10). 11, 12. Cribrospaerella ehrenbergii, Sample 173-1069A-12R-3, 27-29 cm, PH (11) and XP (12). Click on image for close-up.