Plate P4. 1, 2. Asterolampra marylandica Ehrenberg, (1) Sample 172-1063D-2H-2, 28-29 cm, >25; (2) Sample 172-1061A-1H-CC, >20. 3. Asteromphalus elegans Greville, Sample 172-1061A-1H-CC, >20. 4. Asteromphalus heptactis (de Brébisson) Ralphs, Sample 172-1061A-1H-CC, >20. 5. Azpeitia africana (Janisch ex Schmidt) Fryxell & Watkins, Sample 172-1063D-3H-6, 33-34 cm, >25. 6. Azpeitia neocrenulata (Van Landinham) Fryxell & Watkins, Sample 172-1063D-4H-2, 123-124 cm, >25. Scale bars = 10 µm. Click on image for close-up.