Plate P21. Diatoms from rise site: Azpeitia, Hemidiscus, and Actinocyclus. 1, 3. Azpeitia nodulifera. (1a, 1b) Sample 178-1095B-12H-5, 30-31 cm, (3) Sample 178-1095B-6H-5, 40-41 cm. 2. Hemidiscus cuneiformis (Sample 178-1095B-12H-6, 30-31 cm). 4. Azpeitia tabularis (Sample 178-1095A-1H-4, 1-2 cm). 5. Hemidiscus karstenii (Sample 178-1095B-21X-4, 128-130 cm). 6, 7. Azpeitia endoi. (6) Sample 178-1095B-3H-1, 37-38 cm (#2.187), (7) Sample 178-1095B-20X-6, 79-80 cm. 8. Actinocyclus actinochilus (Sample 178-1095B-4H-6, 75-76 cm). 9. Actinocyclus sp. cf. Actinocyclus octonarius (Sample 178-1095B-12H-6, 60-61 cm).