Fig. 8 in A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA

Fig. 8. The neritimorph gastropod Thalassonerita eocenica Squires and Goedert, 1996a from the middle Eocene Satsop Weatherwax seep deposit, Washington State, USA. A. NRM Mo 185015, specimen with nicely preserved aperture. B. NRM Mo 185016, juvenile specimen; apertural view B1); apical view showing spiral sculpture and outline of protoconch (B2); side view showing spiral sculpture (B3). C. NRM Mo 185017, moderately sized specimen; oblique view showing dissolved interior of shell (C1); apical view showing spiral and reticulate sculpture (C2), note that the distinct, fine ribbing near the aperture is most likely the result of dissolution and not sculpture; close-up of protoconch (C3). D. NRM Mo 185018, juvenile specimen in which the protoconch is preserved as internal mold, showing that its internal walls were dissolved; note also reticulate sculpture.