Plate P8. Dinoflagellate cysts from lithologic Unit IV, Hole 1138A. Scale bars = 20 µm. 1, 3-10. Sample 183-1138A-67R-2, 118-120 cm (smear slide). (1) Adnatosphaeridium filiferum (Cookson and Eisenack, 1958) Williams and Downie, 1968 (scale bar a). (3, 6) Cribroperidinium cooksoniae Norwick, 1976 (scale bar b). (4) Indeterminate (scale bar b). (5) Chatangiella cf. tripartita (Cookson and Eisenack, 1960a) Lentin and Williams, 1976 (scale bar b). (7) Hexagonifera cf. glabra Cookson and Eisenack, 1961a (scale bar a). (8, 9) Cribroperidinium muderongense (Cookson and Eisenack, 1958) Davey, 1969 (scale bar b). (10) Trithyrodinium? sp. (scale bar b). 2. Hapsocysta peridictya (Eisenack and Cookson, 1960) Stover and Evitt, 1978 (Sample 183-1138A-69R-5, 124-125 cm) (scale bar a) (smear slide).