Plate P4. Eiffellithaceae, Rhagodiscus asper group. Images with black background are cross-polarized light images; those with light backgrounds are phase contrast images. 1, 2. Helicolithus leckiei (Sample 198-1213B-1R-1, 42 cm). 3, 4. Helicolithus trabeculatus (Sample 198-1214A-2R-CC). 5, 6. Tegumentum stradneri (Sample 198-1207B-35R-CC). 7–11. Rhagodiscus asper; (7) Sample 198-1213B-26R-1, 15 cm, (8, 11) Sample 198-1214A-20R-1, 23 cm, (9) Sample 198-1214A-19R-1, 2 cm, (10) Sample 198-1207B-46R-CC. 12–18. Rhagodiscus amplus; (12) Sample 198-1207B-40R-CCi, (13) holotype (Sample 198-1270B-42R-CCi), (14, 15) Sample 198-1207B-42R-CCi), (16, 17) Sample 198-1207B-41R-CCii, (18) Sample 198-1207B-39R-CCi. 19–36. Rhagodiscus robustus; (19–21) Sample 198-1213B-4R-1, 48 cm, (22) holotype (Sample 198-1214A-19R-1 37 cm), (23, 24, 27) Sample 198-1214A-19R-1, 37 cm, (25) Sample 198-1214A-19R-1, 2 cm, (26) Sample 198-1213B-6R-1, 81 cm, (28, 29) Sample 198-1207B-40R-CCi, (30, 36) Sample 198-1207B-35R-CC, (31, 32) Sample 198-1214A-15R-1, 54 cm, (33–35) Sample 198-1207B-45R-CC. 37–42. Rhagodiscus sageri; (37) holotype (Sample 198-1207B-39R-CC), (38–40) Sample 198-1207B-39R-CC, (41) Sample 198-1214A-25R-1, 22 cm, (42) Sample 198-1207B-30R-CC.