Plate P3. Scanning electron micrographs of calcareous nannofossils from Sample 173-1069A-16R-3, 129 cm, except for figure 2, showing a moderate range of preservations. 1. Somewhat overgrown specimen. 2. (a) Cross-polarized and (b) phase-contrast light micrographs of a specimen from Sample 173-1065A-19R-CC, 7-8 cm. 3. Partially etched and slightly specimen. 4. Ellipsagelosphaera britannica, proximal view. 5. Essentially pristine specimen. 6. Etched specimens. 7. Overgrown specimens. (figs. 6 and 7 are from Wilson et al., in press.) Click on image for close-up.