Plate 11

Globuligerina oxfordiana (Grigelis). Plate re-illustrated from Simmons et al. (1997), plate 2.9. Nos. 1–3, Oxfordian of Upper Volga Basin, Russia, deposited in the Geological Faculty of Moscow State University; spiral, side and umbilical views; clear trace of bulla; specimen diameter 150 µm. Nos. 4 and 8, Oxfordian near Moscow, Russia, deposited in the Geological Faculty of Moscow State University; umbilical view, specimens diameter 140 µm; specimen no. 8 with partial bulla (×300) Nos. 5–7, 9 and 10, Oxfordian near Le Havre, N. France; donated by G. Bignot to The Natural History Museum, London; spiral, side and umbilical views (approx. ×300); detail of surface (×1500) and loop-shaped aperture (×1250). Another specimen in no. 11 with pseudomuricae fusing into short ridges and onset of reticulation (×1000). Nos. 12–15, Oxfordian of Upper Volga Basin, Russia; 2 specimens donated by T. Gorbachik to The Natural History Museum, London; spiral and side views, specimen diameter 170 µm (×235); umbilical view, specimen diameter 140 µm (×285)