Figure 8-10. Paratrochammina challengeri Brönnimann and Whittaker, 1988. 8. Spiral view. Recent. Challenger Station 323, South Atlantic Ocean (1900 fm). Natural History Museum, London. NHM ZF1538. 9. Side view of specimen 8. 10. Umbilical view of specimen 8. Scale Bar = 291 microns.