Cover artwork. Figures 11 and 15 from Biogeography of Some Eocene Larger Foraminifera, and Their Application in Distinguishing Geological Plates, by Peter Lunt. Figure 15. Thin section of white limestone facies showing a slightly oblique, slightly off-axial section through Grzybowskia jasoni n.sp. and two specimens of the small species Discocyclina oceanica Nuttall . Below: Figure 11. Grzybowskia jasoni. Oblique median section through a microspheric specimen.