Fig. 11 in Patterns of drilling predation of cassid gastropods preying on echinoids from the middle Miocene of Poland

Fig. 11. Drilling predation intensities recognised for the particular size classes of preys; Fq, relative frequency of drill holes; grey areas indicate size classes represented by 30 or more specimens. E. linearis and E. pusillus collected from the coarse−grained Heterostegina Sands, and E. pseudopusillus from the fine−grained Heterostegina Sands. Confidence intervals computed from the formulas presented in captions to Fig. 9.