Plate 2. Middle and upper Miocene silicoflagellates. All specimens magnified 500× unless otherwise stated. 1, 6, 7. Distephanus crux longispinus (Schulz). (1) Sample 162-907B-14H-5, 109-110 cm; (6, 7) variety with equant spines, Sample 162-907B-14H-6, 109-110 cm, same specimen at high and low focus. 2. Distephanus crux parvus (Bachmann), Sample 162-982B-48X-5, 99-100 cm. 3. Distephanus crux scutulatus Bukry, Sample 162-982B-39X-3, 99-100 cm. 4, 5. Distephanus crux stradneri (Jerkovic). (4) Sample 162-982B-55X-4, 99-100 cm; (5) Sample 162-907B-14H-1, 109-110 cm. 8, 9. Dictyocha subclinata Bukry. (8) Sample 162-907B-14H-5, 109-110 cm; (9) Sample 162-907B-18H-5, 109-110 cm. 10, 11, 19-22. Distephanus quinarius Locker and Martini. (10, 11) Sample 162-907B-14H-3, 109-110 cm, same specimen at high and low focus; (19, 20) variety with three apical windows, Sample 162-907B-14H-6, 109-110 cm, same specimen (20 magnified at 1250×); (21, 22) variety with two apical windows, Sample 162-907B-14H-5, 109-110 cm, same specimen (22 magnified at 1250×). 12. Bachmannocena triangula (Ehrenberg), Sample 162-982B-25H-1, 99-100 cm. 13. Dictyocha sp. 2, Sample 162-907B-15H-4, 109-110 cm. 14, 15. Dictyocha sp. 3, Sample 162-907B-15H-3, 109-110 cm, same specimen at high and low focus, both magnified at 1250×. 16. Bachmannocena hexalitha (Bukry), Sample 162-907B-14H-2, 109-110 cm. 17. Bachmannocena circulus circulus (Ehrenberg), variety with six irregularly placed spines, Sample 162-907B-17H-1, 109-110 cm. 18. Bachmannocena diodon triodon (Bukry), Sample 162-982B-39X-3, 99-100 cm.