Plate 17

Conoglobigerina helvetojurassica (Haeusler), Sample 4 mid, Eisengraben Section, Birmenstorfer Schichten, Transversarius Zone, Oxfordian, Canton Aargau, Switzerland. No. 1a shows umbilical view; no. 1b shows side view; no. 1c shows spiral view; nos. 1d and 1e show reticulate wall texture. Scale bar for the specimen represents 50 µm; scale bars for wall texture scans are 10 µm long. This specimen may have been sessile for part of its life cycle; for details see text. Plate 4, nos. 2 and 3. Unknown planktonic genus, sample 4 mid, Eisengraben Section, Birmenstorfer Schichten, Transversarius Zone, Middle Oxfordian, Canton Aargau, Switzerland. Scale bars represent 50 µm. For details, see text