Plate P13. Scale bar = 10 µm. 1, 2. Reticulofenestra minutula coccosphere (Sample 189-1172A-23H-3, 15 cm); (1) phase-contrast light (Ph); (2) polarized light (XP). 3, 6. Braarudosphaera bigelowii (Sample 189-1168A-48X-1, 120 cm); (3) differential-interference contrast light (DIC); (6) XP. 4, 5. Reticulofenestra sp. coccosphere (Sample 189-1171C-14X, 15 cm); (4) Ph; (5) XP. 7, 8. Calcidiscus leptoporus coccosphere (Sample 189-1172A-14H-5, 15 cm); (7) DIC; (8) XP. 9, 12. Braarudosphaera discula (Sample 189-1172A-31X-4, 15 cm); (9) DIC; (12) XP. 10. Rhabdosphaera procera (Sample 189-1168A-47X-2, 120 cm) (Ph). 11. Sphenolithus compactus (Sample 189-1172A-29X-2, 15 cm) (Ph).

Plate P13. Scale bar = 10 µm. 1, 2. Reticulofenestra minutula coccosphere (Sample 189-1172A-23H-3, 15 cm); (1) phase-contrast light (Ph); (2) polarized light (XP). 3, 6. Braarudosphaera bigelowii (Sample 189-1168A-48X-1, 120 cm); (3) differential-interference contrast light (DIC); (6) XP. 4, 5. Reticulofenestra sp. coccosphere (Sample 189-1171C-14X, 15 cm); (4) Ph; (5) XP. 7, 8. Calcidiscus leptoporus coccosphere (Sample 189-1172A-14H-5, 15 cm); (7) DIC; (8) XP. 9, 12. Braarudosphaera discula (Sample 189-1172A-31X-4, 15 cm); (9) DIC; (12) XP. 10. Rhabdosphaera procera (Sample 189-1168A-47X-2, 120 cm) (Ph). 11. Sphenolithus compactus (Sample 189-1172A-29X-2, 15 cm) (Ph).