The image is a detailed black and white illustration of a radula, specifically from a whelk. It appears to be a magnified view, as indicated by the text 'x 60' at the bottom. The radula is a ribbon-like structure with rows of tiny, tooth-like structures along its central axis. These teeth are sharply pointed and arranged in a regular pattern. The radula is flanked by what appears to be a folded or corrugated structure on either side, resembling a series of overlapping scales or plates. The overall impression is one of a complex and intricate biological structure, likely used for scraping or cutting food. The image is labeled 'FIG. 12. RADULA OF WHELK.'