Plate P10. Transmitted light microphotographs of radiolarians from Holes 1218A, 1219A, and 1220A. Scale bar = 100 µm. 1–6. Theocyrtis tuberosa group; (1) Sample 199-1218A-25X-7, 75–77 cm (H51/3), (2) Sample 199-1218A-25X-5, 120–122 cm (L18/0), (3) Sample 199-1218A-25X-7, 75–77 cm (A44/3), (4) Sample 199-1218A-25X-7, 75–77 cm (L36/2), (5) Sample 199-1218A-25X-1, 120–122 cm (C51/2), (6) Sample 199-1218A-22X-5, 30–32 cm (A48/0). 7–10. Theocyrtis tuberosa form A; (7) Sample 199-1218A-25X-5, 120–122 cm (F41/4), (8) Sample 199-1218A-25X-5, 120–122 cm (W40/2), (9) Sample 199-1218A-25X-5, 120–122 cm (L39/4), (10) Sample 199-1218A-24X-5, 71–73 cm (N34/4). 11, 12. Theocyrtis tuberosa form B; (11) Sample 199-1220A-9H-7, 63–65 cm (P43/2), (12) Sample 199-1218A-24X-1, 65

Plate P10. Transmitted light microphotographs of radiolarians from Holes 1218A, 1219A, and 1220A. Scale bar = 100 µm. 1–6. Theocyrtis tuberosa group; (1) Sample 199-1218A-25X-7, 75–77 cm (H51/3), (2) Sample 199-1218A-25X-5, 120–122 cm (L18/0), (3) Sample 199-1218A-25X-7, 75–77 cm (A44/3), (4) Sample 199-1218A-25X-7, 75–77 cm (L36/2), (5) Sample 199-1218A-25X-1, 120–122 cm (C51/2), (6) Sample 199-1218A-22X-5, 30–32 cm (A48/0). 7–10. Theocyrtis tuberosa form A; (7) Sample 199-1218A-25X-5, 120–122 cm (F41/4), (8) Sample 199-1218A-25X-5, 120–122 cm (W40/2), (9) Sample 199-1218A-25X-5, 120–122 cm (L39/4), (10) Sample 199-1218A-24X-5, 71–73 cm (N34/4). 11, 12. Theocyrtis tuberosa form B; (11) Sample 199-1220A-9H-7, 63–65 cm (P43/2), (12) Sample 199-1218A-24X-1, 65–67 cm (H43/3).