Plate P1. 1. Actinocyclus curvatulus Janisch, Sample 172-1063D-2H-2, 23-24 cm, >25. 2, 3. Actinocyclus octonarius Ehrenberg, (2) Sample 172-1063D-4H-2, 8-9 cm, >25; (3) Sample 172-1061A-11H-CC, >20. 4. A. octonarius var. tenella (Brebisson) Hajós, Sample 172-1063D-4H-2, 113-114 cm, >25. 5. Actinoptychus splendens Ralphs, Sample 172-1063D-3H-6, 33-34 cm, >25. 6. Actinoptychus senarius (Ehrenberg) Ehrenberg, Sample 172-1063D-2H-2, 28-29 cm, >25. Scale bars = 10 µm. Click on image for close-up.