Plate 1. Stratigraphically important species of Hole 985A in the Oligocene. 1, 2. Hyperammina rugosa Verdenius and van Hinte: note extremely coarse agglutination. (1) 45×; (2) 32×. 3. Spirosigmoilinella compressa Matsunaga, 72×. 4. Psamminopelta gradsteini Kaminski and Geroch [= Psamminopelta sp. of Kaminski et al., 1990], 140×. 5-7. Reticulophragmium rotundidorsatum (Hantken). (5) Lateral view, 65×; (6) apertural view of an extraordinarily well-preserved specimen, 90×; (7) broken specimen showing simple alveoles, 75×. 8. Karreriella siegliei (Gradstein and Kaminski), 80×. 9a, 9b. Adercotryma agterbergi Gradstein and Kaminski. (9a) 200×; (9b) enlargement of aperture, which is umbilical in position with a small flap made of agglutinated particles, 700×.