Plate P1 (continued). 13, 14. Ataxiodinium choane (Sample 189-1168A-8H-4, 60-62 cm); 2, V33-4. 15. Ataxiodinium confusum (Sample 189-1168A-4H-3, 60-62 cm); 1, W26-2. 16, 17. Brigantedinium spp. (Sample 189-1168A-03H-3, 60-62 cm); (16) 2, V30-3; (17) 2, U23-2. 18-20. Caligodinium pychnum (Sample 189-1168A-38X-2, 60-62 cm); (18, 19) 1, S37-1; (20) 1, R36. 21, 22. Cannosphaeropsis sp. A (Sample 189-1168A-70X-3, 60-62 cm); 1, E14-4. 23, 24. Cerebrocysta poulsenii (Sample 189-1168A-20X-2, 60-62 cm); 1, O48-3 (scale bar = ~15 µm). (Continued on next page.)

Plate P1 (continued). 13, 14. Ataxiodinium choane (Sample 189-1168A-8H-4, 60-62 cm); 2, V33-4. 15. Ataxiodinium confusum (Sample 189-1168A-4H-3, 60-62 cm); 1, W26-2. 16, 17. Brigantedinium spp. (Sample 189-1168A-03H-3, 60-62 cm); (16) 2, V30-3; (17) 2, U23-2. 18-20. Caligodinium pychnum (Sample 189-1168A-38X-2, 60-62 cm); (18, 19) 1, S37-1; (20) 1, R36. 21, 22. Cannosphaeropsis sp. A (Sample 189-1168A-70X-3, 60-62 cm); 1, E14-4. 23, 24. Cerebrocysta poulsenii (Sample 189-1168A-20X-2, 60-62 cm); 1, O48-3 (scale bar = ~15 µm).