Plate P18. Diatoms from rise site: Thalassiosira and Porosira?. 1, 2. Thalassiosira spp. (Sample 178-1095A-10H-7, 14.5-15.5 cm). 3. Porosira? spp. (Sample 178-1095B-27X-3, 139-140 cm). 4. Thalassiosira spp. (Sample 178-1095B-26X-1, 39-40 cm). 5, 6, 8. Thalassiosira sp. aff Thalassiosira marujanica of Akiba, 1986. (5) Sample 178-1095B-24X-1, 35-36 cm, (6) Sample 178-1095B-29X-5, 117-119 cm, (8a, 8b) Sample 178-1095B-22X-1, 92-94 cm. 7. Thalassiosira spp. (Sample 178-1095B-12H-4, 41-42 cm). 9. Porosira? spp. (Sample 178-1095B-8H-1, 74-75 cm).