Plate P1. 1, 2. Actinocyclus oculatus Jousé (Samples 191-1179B-3H-6, 75–77 cm [1], and 191-1179C-2H-2, 75–77 cm [2]). 3. Actinocyclus ehrenbergii Ralfs in Pritchard (Sample 191-1179-18H-4, 75–77 cm). 4, 5. Actinocyclus ellipticus Grunow in Van Heurck (Sample 191-1179C-19H-1, 72–74 cm). 6. Actinocyclus ellipticus var. elongatus (Grunow) Kolbe (Sample 191-1179C-17H-6, 75–77 cm). 7. Actinocyclus tenellus (Brébisson) Andrews (Sample 191-1179C-19H-1, 72–74 cm). 8. Actinoptychus spp. (Sample 191-1179B-3H-6, 75–77 cm). Scale bars = 10 µm.