Plate 4. 1. Chiasmolithus expensus, Sample 149-900A-68R-1, 83-84 cm, ph. 2. Cruciplacolithus staurion, Sample 149-900A-73R-2, 106-107 cm, pol. 3. Chiasmolithus grandis, Sample 149-900A-69R-1, 44-45 cm, pol. 4. Pemma papillatum, Sample 149-900A-62R-1, 90-91 cm, pol. 5. Discoaster sublodoensis, (sample 149-900A-73R-1, 21-22 cm, ph. 6. Discoaster lodoensis, Sample 149-900A-75R-2, 29-30 cm, ph. 7. Thoracosphaera spp., Sample 149-900A-53R-1, 1141-142 cm, pol. 8. Discoaster tani nodifer, Sample 149-900A-61R-3, 76-77 cm, ph. 9. Discoaster saipanensis, Sample 149-900A-54R-4, 78-79 cm, ph. 10. Discoaster barbadiensis, Sample 149-900A-54R-3, 35-36 cm, ph. 11. Tribrachiatus contortus, Sample 149-900A-77R-2, 120-121 cm, ph. 12. Tribrachiatus bramlettei, Sample 149-900A-77R-3, 3-4 cm, ph. 13. Discoaster binodosus, Sample 149-900A-60R-1, 91-92 cm, ph. 14, 15. Micrantholithus altus, Sample 149-897C-54R-4, 1-2 cm (14, ph; 15, pol). 16. Blackites spinosus, Sample 149-900A-53R-1, 141-142 cm, pol. 17. Blackites tenuis, Sample 149-900A-54R-4, 178-79 cm, pol. 18. Pseudotriquetrorhabdulus inversus, Sample 149-900A-71R-1, 93-94 cm, pol. Light micrograph abbreviations: pol = polarized light, ph = phase contrast light. Magnification = ×2000.