Plate P5. 1, 2. Coscinodiscus marginatus Ehrenberg (Samples 191-1179C-19H-5, 75–77 cm [1], and 191-1179C-2H-4, 75–77 cm [2]). 3, 4. Coscinodiscus radiatus Ehrenberg (Samples 191-1179B-4H-3, 75–77 cm [3], and 191-1179B-3H-5, 75–77 cm [4]). 5. Paralia sulcata (Ehrenberg) Cleve (Sample 191-1179B-2H-4, 75–77 cm). 6, 7. Hemidiscus cuneiformis Wallich (Samples 191-1179C-16H-5, 75–77 cm [6], and 191-1179C-19H-3, 75–77 cm [7]). 8. Roperia tesselata (Roper) Grunow (Sample 191-1179B-3H-5, 75–77 cm). 9. Diploneis cf. bombus (Ehrenberg) Cleve (Sample 191-1179B-3H-5, 75–77 cm). Scale bars = 10 µm.