Fig. 2 in An enigmatic, possibly chemosymbiotic, hexactinellid sponge from the early Cambrian of South China

Fig. 2. Plot of maximum sponge diameter (measured across most distant two points on outer surface) versus maximum width (in millimetres) for the available specimens, with intercept set to 0 and a quadratic correlation plotted with regression coefficient R2 = 0.997. Largest two specimens are incomplete, and measurements are approximate; assume errors in d of up to 5 mm for these two only.