Plate 10. 1-3. Helicosphaera ampliaperta Bramlette and Wilcoxon. 1. Distal view, ×6000, Sample 149-900A-22R-1, 122 cm. (2, 3) Sample 149-898A-20R-1, 72 cm, XP (2) and Ph (3). 4-6. Helicosphaera paleocarteri Theodoridis. (6) Proximal view, ×4000, Sample 149-900A-22R-1, 122 cm. (4, 5)Sample 149-900A-25R-1, 79 cm, XP (4) and Ph (5). 7-9. Blackites tenuis (Bramlette and Sullivan) Bybell. 7, 8. Sample 149-900A-53R-1, 141 cm, XP (7) and Ph (8). 9. Sample 149-900A-53R-2, 45 cm, XP. 10, 11. Rhabdosphaera procera Martini, Sample 149-900A-38R-2, 57 cm, Ph (10) and Ph (11). 12, 13. Helicosphaera limasera n. sp., Holotype, Sample 897C-47R-6, 6 cm, XP (12) and PL (13). 14, 15. Helicosphaera aff. H. carteri (Wallich) Kamptner, Sample 149-897C-47R-6, 6 cm, XP (14) and PL (15). 16, 17. Sphenolithus orphanknollensis Perch-Nielsen, Sample 149-900A-53R-6, 86 cm, XP, 0° (16) and XP, 45° (17). 18-21. Sphenolithus distentus (Martini) Bramlette and Wilcoxon. (18, 19) Sample 149-897C-45R-4, 109 cm, XP, 0° (18) and XP, 45° (19). (20) Sample 149-900A-49R-4, 99 cm, XP, 45°. (21) Sample 149-900A-49R-3, 113 cm, XP, 45°. 22, 23, 25. Sphenolithus ciperoensis Bramlette and Wilcoxon. (22) Sample 149-900A-44R-1, 131 cm, XP, 45°. (23) Sample 149-900A-44R-1, 131 cm, XP, 45°. (25) Sample 149-899B-9R-5, 21 cm, XP, 45°. 24, 26, 27. Sphenolithus calyculus Bukry, Sample 149-900A-36R-1, 56 cm. (24) XP, 0°. (26-27) XP, 0° and XP, 45°.