Plate P17. Diatoms from rise site: Thalassiosira and Actinocyclus. 1, 2. Thalassiosira aff. trifulta. (1, 2) Sample 178-1095B-45X-1, 41-42 cm. 3. Thalassiosira spp. (Sample 178-1095B-7H-3, 35-36 cm). 4. Thalassiosira spp. (Sample 178-1095B-8H-2, 74-75 cm). 5-8. Thalassiosira spp. (5, 6) Sample 178-1095B-12H-6, 60-61 cm, (7) Sample 178-1095B-22X-1, 92-94 cm, (8) Sample 178-1095B-10H-2, 60-61 cm. 9, 10. Thalassiosira nativa (Sample 178-1095B-45X-1, 41-42 cm). 11. Thalassiosira baldaufii?, inner valve view (Sample 178-1095B-8H-2, 74-75 cm). 12, 13. Thalassiosira aff. trifulta group. (12) Sample 178-1095B-34X-1, 44-45 cm, (13) Sample 178-1095B-43X-2, 64-65 cm. 14, 15. Thalassiosira spp. (14a, 14b) Sample 178-1095B-34X-1, 44-45 cm, (15) Sample 178-1095B-29X-5, 117-119 cm. 16, 17. Thalassiosira spp. (16) Sample 178-1095B-22X-2, 42-44 cm (#381), (17) Sample 178-1095B-27X-3, 139-140 cm. 18, 19. Thalassiosira spp. (18a, 18b) Sample 178-1095B-45X-1, 41-42 cm (#225/224), (19) Sample 178-1095B-12H-6, 60-61 cm. 20. Actinocyclus sp. (Sample 178-1095B-43X-2, 64-65 cm). 21, 22. Thalassiosira sp. g of Fenner et al., 1976 (Sample 178-1095B-34X-1, 44-45 cm).