Plate P4. Diatoms from rise site: Nitzschia and Fragilariopsis. 1, 2. Nitzschia clementia. (1) Sample 178-1095B-28X-5, 88-89 cm, (2) Sample 178-1095B-15X-2, 59-61 cm. 3. Fragilariopsis lacrima (Sample 178-1095B-7H-3, 35-36 cm). 4. Nitzschia spp. (Sample 178-1095B-45X-1, 41-42 cm). 5-7. Fragilariopsis pseudonana. (5) Sample 178-1095B-29X-5, 117-119 cm, (6, 7) Sample 178-1095B-28X-5, 88-89 cm. 8. Nitzschia cf. Fragilariopsis arcula (Sample 178-1095B-21X-4, 128-130 cm). 9-11. Nitzschia spp. (9) Sample 178-1095B-7H-3, 35-36 cm, (10) Sample 178-1095B-36X-4, 8-10 cm, (11) Sample 1095B-33X-1, 43-44 cm. 12, 13. Fragilariopsis sp. aff. Fragilariopsis barronii 2 (Sample 178-1095B-5H-3, 120-122 cm). 14-17. Nitzschia spp. (14) Sample 178-1095B-45X-1, 41-42 cm, (15) Sample 178-1095B-29X-5, 117-119 cm, (16) Sample 178-1095B-9H-4, 105-106 cm, (17) Sample 178-1095B-4H-6, 75-76 cm. 18. Nitzschia januaria (Sample 178-1095B-29X-5, 117-119 cm). 19-23. Fragilariopsis praecurta. (19) Sample 178-1095B-42X-6, 115-116 cm, (20, 21) Sample 178-1095B-28X-5, 88-89 cm, (22) Sample 178-1095B-18X-6, 28-29 cm, (23) Sample 178-1095B-12H-5, 30-31 cm. 24. Fragilariopsis cf. Fragilariopsis praecurta (Sample 178-1095B-9H-4, 105-106 cm). 25-28. Fragilariopsis aurica. (25) Sample 178-1095B-9H-4, 105-106 cm, (26) Sample 178-1095B-7H-3, 35-36 cm, (27) Sample 178-1095B-8H-5, 75-76, (28) Sample 178-1095B-13H-4, 120-121 cm.