Plate P6. 1, 2. Denticulopsis lauta (Bailey) Simonsen (Sample 191-1179C-19H-6, 75–77 cm). 3, 4. Nitzschia rolandii Schrader emend. Koizumi (Sample 191-1179C-19H-1, 72–74 cm). 5, 6. Neodenticula kamtschatica (Zabelina) Akiba and Yanigasawa (Sample 191-1179C-12H-6, 75–77 cm). 7–10. Neodenticula koizumii Akiba and Yanagisawa (Samples 191-1179C-2H-2, 75–77 cm [7], 191-1179C-7H-5, 75–77 cm [8], 191-1179C-6H-4, 75–77 cm [9], and 191-1179C-7H-6, 75–77 cm [10]). 11–13. Neodenticula seminae (Simonsen and Kanaya) Akiba and Yanagisawa (Sample 191-1179B-3H-5, 75–77 cm). 14, 15. Nitzschia cf. extincta Kozurenko and Sheshukova-Poretzkaya sensu Kozumi (Samples 191-1179C-2H-2, 75–77 cm [14], and 191-1179C-6H-7, 60–62 cm [15]). 16, 17. Nitzschia cf. interruptestriata Simonsen (Samples 191-1179B-3H-5, 75–77 cm [16], and 191-1179C-5H-5, 75–77 cm [17]). 18. Nitzschia sicula var. (Castracane) Hustedt (Sample 191-1179C-12H-6, 75–77 cm). 19–21. Nitzschia reinholdii Kanaya and Koizumi (Samples 191-1179C-19H-3, 75–77 cm [19], 191-1179C-19H-1, 72–74 cm [20], and 191-1179B-5H-5, 75–77 cm [21]). 22. Nitzschia marina Grunow in Cleve and Grunow (Sample 191-1179B-3H-6, 75–77 cm). 23. Nitzschia miocenica Burckle (Sample 191-1179C-18H-3, 75–77 cm). 24, 25. Nitzschia jouseae Burckle (Sample 191-1179C-12H-4, 75–77 cm). 26–28. Fragilariopsis doliolus (Wallich) Medlin and Sims (Samples 191-1179B-5H-6, 75–77 cm [26], 191-1179B-3H-6, 75–77 cm [27], and 191-1179B-3H-5, 75–77 cm [28]). 29, 30. Nitzschia fossilis (Frenguelli) Kanaya (Sample 191-1179C-7H-3, 75–77 cm). 31. Rouxia spp. (Sample 191-1179C-17H-4, 75–77 cm). 32. Rouxia californica Peragallo in Tempère and Peragallo (Sample 191-1179C-18H-1, 75–77 cm). 33. Bogorovia lancettula (Schrader) Yanagisawa (Sample 191-1179C-18H-5, 75–77 cm). 34. Koizumia tatsunokuchiensis (Koizumi) Yanagisawa (Sample 191-1179C-14H-4, 73–75 cm). 35. Rossiella elongata (Barron) Desikachary in Desikachary et al. (Sample 191-1179C-18H-5, 75–77 cm). Scale bars = 10 µm.