Plate P15. Diatoms from rise site: Thalassiosira and Actinocyclus. 1. Thalassiosira vulnifica (Sample 178-1095A-10H-7, 14.5-15.5 cm). 2. Thalassiosira mahoodii (Sample 178-1095B-31X-3, 99-101 cm). 3. Actinocyclus ingens s.s. (Sample 178-1095A-3H-6, 27-28 cm). 4. Thalassiosira striata (Sample 178-1095A-10H-7, 14.5-15.5 cm). 5. Actinocyclus ingens var. ovalis (Sample 178-1095B-28X-5, 88-89 cm). 6, 7. Thalassiosira torokina. (6a-6c) Sample 178-1095B-14X-3, 65-66 cm, (7a, 7b) Sample 178-1095B-13H-4, 120-121 cm.