Plate P7. Scale bar = 10 µm. Sample 183-1138A-52R-3, 140-141 cm. 1A-1C. Kamptnerius magnificus; (1A) crossed polarizers, (1B) transmitted light, (1C) differential interference contrast light (DIC). 2A-2C. Nephrolithus frequens; (2A) crossed polarizers, (2B) transmitted light, (2C) DIC. 3A, 3B. Arkhangelskiella cymbiformis; (3A) crossed polarizers, (3B) DIC. 4. Prediscosphaera cretacea (crossed polarizers).

Plate P7. Scale bar = 10 µm. Sample 183-1138A-52R-3, 140-141 cm. 1A-1C. Kamptnerius magnificus; (1A) crossed polarizers, (1B) transmitted light, (1C) differential interference contrast light (DIC). 2A-2C. Nephrolithus frequens; (2A) crossed polarizers, (2B) transmitted light, (2C) DIC. 3A, 3B. Arkhangelskiella cymbiformis; (3A) crossed polarizers, (3B) DIC. 4. Prediscosphaera cretacea (crossed polarizers).